{"id":1950,"date":"2026-10-08T06:54:51","date_gmt":"2026-10-08T06:54:51","guid":{"rendered":"https:\/\/metalite.net\/?p=1950"},"modified":"2026-10-08T07:03:12","modified_gmt":"2026-10-08T07:03:12","slug":"rv-vs-wp-worm-gearbox","status":"publish","type":"post","link":"https:\/\/metalite.net\/ru\/application\/rv-vs-wp-worm-gearbox\/","title":{"rendered":"RV vs WP Worm Gearbox: Which Series Should You Choose? | Metalite"},"content":{"rendered":"<div style=\"font-family: 'Segoe UI', Arial, sans-serif; color: #333333; line-height: 1.78; max-width: 960px; margin: 0 auto; padding: 0 16px; box-sizing: border-box;\">\n<p><!-- Intro --><\/p>\n<p style=\"font-size: 17px; color: #444; margin-top: 0; margin-bottom: 18px;\">The RV Series (NMRV) and WP Series are both worm gearboxes \u2014 they share the same 90\u00b0 right-angle power transmission principle and similar gear material specifications. But they are designed for different application profiles, and choosing the wrong one for an installation means either over-engineering a straightforward OEM drive or under-specifying a heavy industrial load. This comparison covers the key differences: housing geometry, weight, motor interface, torque capacity, and the application conditions where each series performs best.<\/p>\n<p style=\"font-size: 17px; color: #444; margin-bottom: 32px;\">The goal is not to declare one series &#8220;better&#8221; \u2014 it is to give engineers and procurement teams the decision criteria to select the right one without back-and-forth with a supplier. Both series are available from EPG Canada; detailed specifications for each are linked at the end of this page.<\/p>\n<p><!-- ======================== SECTION 1: HOUSING ======================== --><\/p>\n<h2 style=\"font-size: 26px; color: #1a4b8c; font-weight: bold; border-bottom: 2px solid #dde8f6; padding-bottom: 10px; margin-top: 0; margin-bottom: 22px;\">Housing Geometry: The Fundamental Difference<\/h2>\n<div style=\"display: flex; flex-wrap: wrap; gap: 20px; margin-bottom: 28px;\">\n<div style=\"flex: 1 1 280px; border: 1px solid #dde5f0; border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #1a4b8c; padding: 14px 18px;\">\n<p style=\"font-weight: bold; color: #fff; font-size: 16px; margin: 0;\">RV Series (NMRV)<\/p>\n<p style=\"color: #c8daf5; font-size: 13px; margin: 4px 0 0 0;\">Square-block flange housing<\/p>\n<\/div>\n<div style=\"padding: 18px;\">\n<p><img decoding=\"async\" style=\"max-width: 100%; height: auto; border-radius: 4px; margin-bottom: 14px;\" src=\"https:\/\/metalite.net\/wp-content\/uploads\/2026\/07\/RV-Series-Worm-Gear-Reducer.webp\" alt=\"RV series NMRV square block flange housing with motor mounting face showing compact profile\" title=\"\"><\/p>\n<ul style=\"padding-left: 18px; margin: 0; font-size: 14px; color: #555; line-height: 1.7;\">\n<li style=\"margin-bottom: 6px;\">Compact square or rectangular block form factor<\/li>\n<li style=\"margin-bottom: 6px;\">Motor mounting face machined directly into the housing on one (or more) sides<\/li>\n<li style=\"margin-bottom: 6px;\">Motor adapter plate and spider coupling supplied as standard<\/li>\n<li style=\"margin-bottom: 6px;\">Motor connects in minutes \u2014 no alignment procedure beyond tightening bolts<\/li>\n<li style=\"margin-bottom: 0;\">Designed to be the smallest possible motor-gearbox assembly for a given torque<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div style=\"flex: 1 1 280px; border: 1px solid #dde5f0; border-radius: 8px; overflow: hidden;\">\n<div style=\"background: #555; padding: 14px 18px;\">\n<p style=\"font-weight: bold; color: #fff; font-size: 16px; margin: 0;\">WP Series<\/p>\n<p style=\"color: #ccc; font-size: 13px; margin: 4px 0 0 0;\">Rectangular foot-mounted housing<\/p>\n<\/div>\n<div style=\"padding: 18px;\">\n<p><img decoding=\"async\" style=\"max-width: 100%; height: auto; border-radius: 4px; margin-bottom: 14px;\" src=\"https:\/\/metalite.net\/wp-content\/uploads\/2026\/07\/WP-Series-Worm-Gearbox.webp\" alt=\"WP series cast iron rectangular foot-mounted worm gearbox housing showing solid heavy duty construction\" title=\"\"><\/p>\n<ul style=\"padding-left: 18px; margin: 0; font-size: 14px; color: #555; line-height: 1.7;\">\n<li style=\"margin-bottom: 6px;\">Traditional rectangular housing with integral foot (base-plate) mounting pads<\/li>\n<li style=\"margin-bottom: 6px;\">Motor connects via a separate coupling and motor adapter bracket<\/li>\n<li style=\"margin-bottom: 6px;\">Larger overall footprint than RV at same torque output<\/li>\n<li style=\"margin-bottom: 6px;\">Multiple sub-models (WPA, WPDA, WPO, WPS\u2026) cover different shaft\/output arrangements<\/li>\n<li style=\"margin-bottom: 0;\">Heavier construction optimised for structural rigidity under large gear forces<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<p style=\"margin-bottom: 32px; font-size: 15px; color: #444; background: #f8fafd; border: 1px solid #dde5f0; border-radius: 6px; padding: 16px 18px;\"><strong>In plain terms:<\/strong> the RV Series is built around the motor \u2014 the housing geometry is designed to make motor mounting as easy and compact as possible. The WP Series is built around the structure \u2014 the housing geometry is designed to handle large forces in sustained industrial service.<\/p>\n<p><!-- ======================== SECTION 2: WEIGHT ======================== --><\/p>\n<h2 style=\"font-size: 26px; color: #1a4b8c; font-weight: bold; border-bottom: 2px solid #dde8f6; padding-bottom: 10px; margin-top: 44px; margin-bottom: 20px;\">Weight and Installation Comparison<\/h2>\n<p style=\"margin-bottom: 16px;\">The RV Series (NMRV) is significantly lighter than a WP Series unit at equivalent torque output, for two reasons: aluminum housing on smaller frame sizes, and a more compact housing geometry that removes the material of the foot-mounting pads and extended housing walls of the WP design.<\/p>\n<div style=\"overflow-x: auto; -webkit-overflow-scrolling: touch; margin-bottom: 12px;\">\n<table style=\"width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 520px;\">\n<thead>\n<tr style=\"background: #1a4b8c; color: #fff;\">\n<th style=\"padding: 11px 13px; text-align: center; font-weight: 600;\">Approx. Torque (Nm)<\/th>\n<th style=\"padding: 11px 13px; text-align: center; font-weight: 600;\">RV Series Frame<\/th>\n<th style=\"padding: 11px 13px; text-align: center; font-weight: 600;\">RV Unit Weight (kg)<\/th>\n<th style=\"padding: 11px 13px; text-align: center; font-weight: 600;\">WP Series Frame<\/th>\n<th style=\"padding: 11px 13px; text-align: center; font-weight: 600;\">WP Unit Weight (kg)<\/th>\n<th style=\"padding: 11px 13px; text-align: center; font-weight: 600;\">Weight Saving<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #f8fafd;\">\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~50<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #1a4b8c; font-weight: 600;\">RV050<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~2.0<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">WP50<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~3.5<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #2a8a3a; font-weight: 600;\">~43%<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~100<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #1a4b8c; font-weight: 600;\">RV063<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~3.5<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">WP60<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~6.0<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #2a8a3a; font-weight: 600;\">~42%<\/td>\n<\/tr>\n<tr style=\"background: #f8fafd;\">\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~200<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #1a4b8c; font-weight: 600;\">RV075<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~5.8<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">WP70<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~9.5<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #2a8a3a; font-weight: 600;\">~39%<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~350<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #1a4b8c; font-weight: 600;\">RV090<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~9.0<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">WP80<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~14.5<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #2a8a3a; font-weight: 600;\">~38%<\/td>\n<\/tr>\n<tr style=\"background: #f8fafd;\">\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~600<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">RV110 (cast iron)<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~22<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">WP100<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~28<\/td>\n<td style=\"padding: 10px 13px; text-align: center; color: #555;\">~21%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"font-size: 12.5px; color: #888; margin-bottom: 32px;\">* Approximate values at mid-range ratio; weights vary by specific ratio and output configuration. Contact our team for exact weight data from dimensional drawings.<\/p>\n<p><!-- ======================== SECTION 3: MOTOR INTERFACE ======================== --><\/p>\n<h2 style=\"font-size: 26px; color: #1a4b8c; font-weight: bold; border-bottom: 2px solid #dde8f6; padding-bottom: 10px; margin-top: 44px; margin-bottom: 20px;\">Motor Interface: Direct Flange vs Separate Coupling<\/h2>\n<div style=\"display: flex; flex-wrap: wrap; gap: 20px; margin-bottom: 32px;\">\n<div style=\"flex: 1 1 260px; background: #f0f8f2; border: 1px solid #b8dfc5; border-radius: 8px; padding: 20px;\">\n<p style=\"font-weight: bold; color: #1d6a3b; font-size: 15px; margin: 0 0 12px 0;\">\u2713 RV Series \u2014 Motor Mounting in Minutes<\/p>\n<ol style=\"padding-left: 20px; margin: 0; font-size: 14px; color: #555; line-height: 1.7;\">\n<li style=\"margin-bottom: 8px;\">Select the correct motor adapter plate for your motor frame size (supplied with the unit)<\/li>\n<li style=\"margin-bottom: 8px;\">Fit the adapter to the motor face \u2014 four bolts<\/li>\n<li style=\"margin-bottom: 8px;\">Engage the motor shaft into the gearbox input socket via the spider coupling<\/li>\n<li style=\"margin-bottom: 0;\">Bolt the motor-adapter assembly to the gearbox housing \u2014 four bolts. Done.<\/li>\n<\/ol>\n<p style=\"font-size: 13px; color: #1d6a3b; margin: 12px 0 0 0; font-weight: 600;\">No alignment tools, no coupling purchase, no bracket fabrication.<\/p>\n<\/div>\n<div style=\"flex: 1 1 260px; background: #f8fafd; border: 1px solid #dde5f0; border-radius: 8px; padding: 20px;\">\n<p style=\"font-weight: bold; color: #555; font-size: 15px; margin: 0 0 12px 0;\">WP Series \u2014 Traditional Motor Connection<\/p>\n<ol style=\"padding-left: 20px; margin: 0; font-size: 14px; color: #555; line-height: 1.7;\">\n<li style=\"margin-bottom: 8px;\">Select or fabricate a motor bracket to locate the motor relative to the gearbox<\/li>\n<li style=\"margin-bottom: 8px;\">Select and source a shaft coupling (jaw, flexible disc, or rigid) to join motor and worm shaft<\/li>\n<li style=\"margin-bottom: 8px;\">Align motor and gearbox shafts within the coupling&#8217;s tolerance \u2014 requires alignment tools on larger frames<\/li>\n<li style=\"margin-bottom: 0;\">Bolt down and connect. Alignment should be verified after thermal run-in.<\/li>\n<\/ol>\n<p style=\"font-size: 13px; color: #888; margin: 12px 0 0 0;\">More installation steps \u2014 but allows any motor type, position, and coupling style to be used.<\/p>\n<\/div>\n<\/div>\n<p><!-- ======================== SECTION 4: TORQUE & LOAD ======================== --><\/p>\n<h2 style=\"font-size: 26px; color: #1a4b8c; font-weight: bold; border-bottom: 2px solid #dde8f6; padding-bottom: 10px; margin-top: 44px; margin-bottom: 20px;\">Torque Capacity and Duty Cycle<\/h2>\n<p style=\"margin-bottom: 18px;\">Both series offer overlapping torque ranges, but their duty-cycle ratings differ because of the housing material and construction difference:<\/p>\n<div style=\"overflow-x: auto; -webkit-overflow-scrolling: touch; margin-bottom: 32px;\">\n<table style=\"width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 480px;\">\n<thead>\n<tr style=\"background: #1a4b8c; color: #fff;\">\n<th style=\"padding: 12px 14px; text-align: left; font-weight: 600;\">Parameter<\/th>\n<th style=\"padding: 12px 14px; text-align: center; font-weight: 600;\">RV Series (NMRV)<\/th>\n<th style=\"padding: 12px 14px; text-align: center; font-weight: 600;\">WP Series<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #f8fafd;\">\n<td style=\"padding: 11px 14px; font-weight: 600; color: #333;\">Max torque range<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #555;\">4 \u2013 1,760 Nm<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #555;\">30 \u2013 4,500 Nm<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 11px 14px; font-weight: 600; color: #333;\">Frame size range<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #555;\">025 \u2013 150<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #555;\">40 \u2013 250<\/td>\n<\/tr>\n<tr style=\"background: #f8fafd;\">\n<td style=\"padding: 11px 14px; font-weight: 600; color: #333;\">Recommended max duty cycle<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #555;\">S3 \/ S4 (intermittent to moderate continuous)<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #1a4b8c; font-weight: 600;\">S1 (continuous 24\/7)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 11px 14px; font-weight: 600; color: #333;\">Shock load tolerance<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #555;\">Moderate<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #1a4b8c; font-weight: 600;\">High<\/td>\n<\/tr>\n<tr style=\"background: #f8fafd;\">\n<td style=\"padding: 11px 14px; font-weight: 600; color: #333;\">Vibration damping<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #555;\">Moderate (aluminum housing)<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #1a4b8c; font-weight: 600;\">High (cast iron housing)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 11px 14px; font-weight: 600; color: #333;\">Housing structural rigidity<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #555;\">Good (sizes 025\u2013090)<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #1a4b8c; font-weight: 600;\">High (all sizes, cast iron)<\/td>\n<\/tr>\n<tr style=\"background: #f8fafd;\">\n<td style=\"padding: 11px 14px; font-weight: 600; color: #333;\">Self-locking capability<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #555;\">Yes (at ratios \u226530:1)<\/td>\n<td style=\"padding: 11px 14px; text-align: center; color: #555;\">Yes (at ratios \u226530:1)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><!-- ======================== SECTION 5: APPLICATIONS SIDE BY SIDE ======================== --><\/p>\n<h2 style=\"font-size: 26px; color: #1a4b8c; font-weight: bold; border-bottom: 2px solid #dde8f6; padding-bottom: 10px; margin-top: 44px; margin-bottom: 20px;\">Application Scenarios: Which Fits Where?<\/h2>\n<div style=\"overflow-x: auto; -webkit-overflow-scrolling: touch; margin-bottom: 32px;\">\n<table style=\"width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 540px;\">\n<thead>\n<tr style=\"background: #1a4b8c; color: #fff;\">\n<th style=\"padding: 11px 14px; text-align: left; font-weight: 600;\">Application<\/th>\n<th style=\"padding: 11px 14px; text-align: center; font-weight: 600;\">RV \/ NMRV<\/th>\n<th style=\"padding: 11px 14px; text-align: center; font-weight: 600;\">WP Series<\/th>\n<th style=\"padding: 11px 14px; text-align: left; font-weight: 600;\">Reason<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #f8fafd;\">\n<td style=\"padding: 10px 14px; color: #333; font-weight: 600;\">OEM machine drive (compact)<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #2a8a3a; font-weight: bold;\">\u2713 Preferred<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #888;\">Possible<\/td>\n<td style=\"padding: 10px 14px; color: #555; font-size: 13px;\">Direct motor flange; minimal assembly footprint<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; color: #333; font-weight: 600;\">Food \/ pharmaceutical<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #2a8a3a; font-weight: bold;\">\u2713 Preferred<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #c05800;\">Not recommended<\/td>\n<td style=\"padding: 10px 14px; color: #555; font-size: 13px;\">Aluminum housing; no rust risk; easier cleaning<\/td>\n<\/tr>\n<tr style=\"background: #f8fafd;\">\n<td style=\"padding: 10px 14px; color: #333; font-weight: 600;\">Packaging &amp; labelling<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #2a8a3a; font-weight: bold;\">\u2713 Preferred<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #888;\">Over-specified<\/td>\n<td style=\"padding: 10px 14px; color: #555; font-size: 13px;\">Light duty, high cycle; RV aluminum housing dissipates heat well<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; color: #333; font-weight: 600;\">Ceramics \/ dyeing \/ chemical<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #2a8a3a; font-weight: bold;\">\u2713 Preferred<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #888;\">Acceptable<\/td>\n<td style=\"padding: 10px 14px; color: #555; font-size: 13px;\">Compact motor integration; moderate torque typical<\/td>\n<\/tr>\n<tr style=\"background: #f8fafd;\">\n<td style=\"padding: 10px 14px; color: #333; font-weight: 600;\">Heavy industrial conveyor<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #888;\">Possible (light duty)<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #2a8a3a; font-weight: bold;\">\u2713 Preferred<\/td>\n<td style=\"padding: 10px 14px; color: #555; font-size: 13px;\">Sustained high torque; cast iron shock resistance needed<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; color: #333; font-weight: 600;\">Mining &amp; aggregate equipment<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #c05800;\">Not recommended<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #2a8a3a; font-weight: bold;\">\u2713 Preferred<\/td>\n<td style=\"padding: 10px 14px; color: #555; font-size: 13px;\">Heavy shock loading requires cast iron damping and rigidity<\/td>\n<\/tr>\n<tr style=\"background: #f8fafd;\">\n<td style=\"padding: 10px 14px; color: #333; font-weight: 600;\">24\/7 continuous heavy duty<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #c05800;\">Not recommended<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #2a8a3a; font-weight: bold;\">\u2713 Preferred<\/td>\n<td style=\"padding: 10px 14px; color: #555; font-size: 13px;\">Cast iron thermal mass and structural rigidity for sustained duty<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; color: #333; font-weight: 600;\">Belt-driven or chain-input drive<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #c05800;\">Not suited<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #2a8a3a; font-weight: bold;\">\u2713 Preferred (WPS model)<\/td>\n<td style=\"padding: 10px 14px; color: #555; font-size: 13px;\">WPS sub-model has solid projecting input shaft for belt\/chain input<\/td>\n<\/tr>\n<tr style=\"background: #f8fafd;\">\n<td style=\"padding: 10px 14px; color: #333; font-weight: 600;\">Water treatment \/ aerators<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #2a8a3a; font-weight: bold;\">\u2713 Possible<\/td>\n<td style=\"padding: 10px 14px; text-align: center; color: #2a8a3a; font-weight: bold;\">\u2713 Preferred (large frames)<\/td>\n<td style=\"padding: 10px 14px; color: #555; font-size: 13px;\">RV for light aerators; WP for large slow mixers and clarifiers<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><!-- ======================== SECTION 6 & 7: WHEN TO CHOOSE ======================== --><\/p>\n<h2 style=\"font-size: 26px; color: #1a4b8c; font-weight: bold; border-bottom: 2px solid #dde8f6; padding-bottom: 10px; margin-top: 44px; margin-bottom: 20px;\">When to Choose the RV Series (NMRV)<\/h2>\n<div style=\"display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 32px;\">\n<div style=\"flex: 1 1 190px; background: #f0f8f2; border: 1px solid #b8dfc5; border-radius: 6px; padding: 15px 16px;\">\n<p style=\"font-weight: bold; color: #1d6a3b; font-size: 13.5px; margin: 0 0 6px 0;\">\u2713 OEM machine integration<\/p>\n<p style=\"margin: 0; font-size: 13px; color: #555; line-height: 1.6;\">When you are building a machine and need the motor and gearbox to assemble as a single compact unit without brackets or alignment work \u2014 RV is the right format.<\/p>\n<\/div>\n<div style=\"flex: 1 1 190px; background: #f0f8f2; border: 1px solid #b8dfc5; border-radius: 6px; padding: 15px 16px;\">\n<p style=\"font-weight: bold; color: #1d6a3b; font-size: 13.5px; margin: 0 0 6px 0;\">\u2713 Weight-sensitive installation<\/p>\n<p style=\"margin: 0; font-size: 13px; color: #555; line-height: 1.6;\">When the drive is elevated, mobile, or handled regularly during maintenance \u2014 the 30\u201340% weight saving of the aluminum RV housing is a genuine advantage.<\/p>\n<\/div>\n<div style=\"flex: 1 1 190px; background: #f0f8f2; border: 1px solid #b8dfc5; border-radius: 6px; padding: 15px 16px;\">\n<p style=\"font-weight: bold; color: #1d6a3b; font-size: 13.5px; margin: 0 0 6px 0;\">\u2713 Food \/ pharma \/ corrosive environment<\/p>\n<p style=\"margin: 0; font-size: 13px; color: #555; line-height: 1.6;\">When the environment demands a non-rusting gearbox surface \u2014 the aluminum RV housing eliminates the rust-contamination risk that cast iron carries in wet or chemical environments.<\/p>\n<\/div>\n<div style=\"flex: 1 1 190px; background: #f0f8f2; border: 1px solid #b8dfc5; border-radius: 6px; padding: 15px 16px;\">\n<p style=\"font-weight: bold; color: #1d6a3b; font-size: 13.5px; margin: 0 0 6px 0;\">\u2713 High-cycle intermittent duty<\/p>\n<p style=\"margin: 0; font-size: 13px; color: #555; line-height: 1.6;\">Packaging, labelling, and indexing equipment with high start-stop frequency \u2014 the aluminum housing&#8217;s faster heat dissipation keeps oil temperature lower between cycles.<\/p>\n<\/div>\n<div style=\"flex: 1 1 190px; background: #f0f8f2; border: 1px solid #b8dfc5; border-radius: 6px; padding: 15px 16px;\">\n<p style=\"font-weight: bold; color: #1d6a3b; font-size: 13.5px; margin: 0 0 6px 0;\">\u2713 Torque up to ~1,760 Nm<\/p>\n<p style=\"margin: 0; font-size: 13px; color: #555; line-height: 1.6;\">When the application falls within the RV150 (1,760 Nm) torque envelope and duty cycle is moderate \u2014 RV satisfies the requirement at lower weight and with simpler motor installation.<\/p>\n<\/div>\n<\/div>\n<h2 style=\"font-size: 26px; color: #1a4b8c; font-weight: bold; border-bottom: 2px solid #dde8f6; padding-bottom: 10px; margin-top: 44px; margin-bottom: 20px;\">When to Choose the WP Series<\/h2>\n<div style=\"display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px;\">\n<div style=\"flex: 1 1 190px; background: #fff8f3; border: 1px solid #f5c48a; border-radius: 6px; padding: 15px 16px;\">\n<p style=\"font-weight: bold; color: #c05800; font-size: 13.5px; margin: 0 0 6px 0;\">\u2192 Torque above 1,760 Nm<\/p>\n<p style=\"margin: 0; font-size: 13px; color: #555; line-height: 1.6;\">The WP Series scales to 4,500 Nm at frame 250 \u2014 beyond the RV150&#8217;s ceiling. For large-frame high-torque applications, WP is the only option in a standard worm gearbox.<\/p>\n<\/div>\n<div style=\"flex: 1 1 190px; background: #fff8f3; border: 1px solid #f5c48a; border-radius: 6px; padding: 15px 16px;\">\n<p style=\"font-weight: bold; color: #c05800; font-size: 13.5px; margin: 0 0 6px 0;\">\u2192 Continuous 24\/7 heavy duty<\/p>\n<p style=\"margin: 0; font-size: 13px; color: #555; line-height: 1.6;\">Cast iron&#8217;s thermal mass and structural rigidity make WP the right choice for drives running continuously at high torque \u2014 mining, water treatment, metallurgy, and heavy conveyors.<\/p>\n<\/div>\n<div style=\"flex: 1 1 190px; background: #fff8f3; border: 1px solid #f5c48a; border-radius: 6px; padding: 15px 16px;\">\n<p style=\"font-weight: bold; color: #c05800; font-size: 13.5px; margin: 0 0 6px 0;\">\u2192 High shock loading<\/p>\n<p style=\"margin: 0; font-size: 13px; color: #555; line-height: 1.6;\">Cast iron absorbs vibration energy that aluminum transmits. In crusher discharge conveyors, hammer mills, or any application with repeated impact loads, WP damping capacity is essential.<\/p>\n<\/div>\n<div style=\"flex: 1 1 190px; background: #fff8f3; border: 1px solid #f5c48a; border-radius: 6px; padding: 15px 16px;\">\n<p style=\"font-weight: bold; color: #c05800; font-size: 13.5px; margin: 0 0 6px 0;\">\u2192 Belt or chain input drive<\/p>\n<p style=\"margin: 0; font-size: 13px; color: #555; line-height: 1.6;\">The WPS sub-model provides a solid projecting input shaft for belt or chain drive input \u2014 not available in the RV format, which is designed exclusively for motor flange input.<\/p>\n<\/div>\n<div style=\"flex: 1 1 190px; background: #fff8f3; border: 1px solid #f5c48a; border-radius: 6px; padding: 15px 16px;\">\n<p style=\"font-weight: bold; color: #c05800; font-size: 13.5px; margin: 0 0 6px 0;\">\u2192 Double-output shaft required<\/p>\n<p style=\"margin: 0; font-size: 13px; color: #555; line-height: 1.6;\">The WPDA sub-model provides output shaft extensions on both sides of the housing to drive two parallel loads \u2014 a configuration not standardly available in the RV Series.<\/p>\n<\/div>\n<\/div>\n<p><!-- ======================== FINAL DECISION BOX ======================== --><\/p>\n<div style=\"border: 2px solid #1a4b8c; border-radius: 10px; padding: 28px 26px; margin-bottom: 44px; background: #f8fbff;\">\n<p style=\"font-weight: bold; font-size: 18px; color: #1a4b8c; margin: 0 0 16px 0; text-align: center;\">Quick Decision: RV or WP?<\/p>\n<div style=\"display: flex; flex-wrap: wrap; gap: 10px; justify-content: center;\">\n<div style=\"flex: 1 1 260px; background: #fff; border-radius: 6px; border: 1px solid #b8dfc5; padding: 16px;\">\n<p style=\"text-align: center; font-weight: bold; color: #1d6a3b; font-size: 15px; margin: 0 0 12px 0;\">Choose RV Series if\u2026<\/p>\n<ul style=\"padding-left: 16px; margin: 0; font-size: 13.5px; color: #555; line-height: 1.7;\">\n<li>Motor mounts directly to the gearbox<\/li>\n<li>Space or weight is a constraint<\/li>\n<li>Environment is food, pharma, or wet<\/li>\n<li>Duty is intermittent to moderate continuous<\/li>\n<li>Torque requirement is \u22641,760 Nm<\/li>\n<\/ul>\n<\/div>\n<div style=\"flex: 1 1 260px; background: #fff; border-radius: 6px; border: 1px solid #f5c48a; padding: 16px;\">\n<p style=\"text-align: center; font-weight: bold; color: #c05800; font-size: 15px; margin: 0 0 12px 0;\">Choose WP Series if\u2026<\/p>\n<ul style=\"padding-left: 16px; margin: 0; font-size: 13.5px; color: #555; line-height: 1.7;\">\n<li>Duty is continuous 24\/7 or high shock loading<\/li>\n<li>Torque exceeds 1,760 Nm<\/li>\n<li>Belt or chain input drive is needed<\/li>\n<li>Double-output shaft configuration required<\/li>\n<li>Vibration damping is critical (crushing, mining)<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<p><!-- ======================== CTA ======================== --><\/p>\n<div style=\"background: linear-gradient(135deg, #1a4b8c 0%, #1e5ca8 100%); border-radius: 10px; padding: 36px 30px; text-align: center; margin-bottom: 48px;\">\n<h2 style=\"color: #ffffff; font-size: 22px; margin-top: 0; margin-bottom: 12px; font-weight: bold;\">Not Sure Which Series Fits Your Application?<\/h2>\n<p style=\"color: #c8daf5; font-size: 15px; margin-bottom: 24px; max-width: 520px; margin-left: auto; margin-right: auto; line-height: 1.65;\">Send us your torque, output speed, duty cycle, and environment details. We will recommend the correct series and model within 24 hours \u2014 no obligation.<\/p>\n<div style=\"display: flex; flex-wrap: wrap; gap: 12px; justify-content: center;\"><a style=\"display: inline-block; background: #e8720c; color: #fff; text-decoration: none; padding: 13px 28px; border-radius: 5px; font-size: 15px; font-weight: bold;\" href=\"mailto:sales@metalite.net\">Email: sales@metalite.net<\/a><br \/>\n<a style=\"display: inline-block; background: transparent; color: #fff; text-decoration: none; padding: 13px 28px; border-radius: 5px; font-size: 15px; font-weight: bold; border: 2px solid rgba(255,255,255,0.7);\" href=\"tel:+16047192870\">+1-604-719-2870<\/a><\/div>\n<\/div>\n<p><!-- ======================== FAQ ======================== --><\/p>\n<h2 style=\"font-size: 26px; color: #1a4b8c; font-weight: bold; border-bottom: 2px solid #dde8f6; padding-bottom: 10px; margin-top: 0; margin-bottom: 24px;\">Frequently Asked Questions<\/h2>\n<div style=\"border: 1px solid #dde5f0; border-radius: 6px; overflow: hidden; margin-bottom: 14px;\">\n<div style=\"background: #eef4fc; padding: 14px 18px;\">\n<p style=\"font-weight: bold; color: #1a4b8c; margin: 0; font-size: 15px;\">Can I replace a WP Series gearbox with an RV Series at the same torque rating?<\/p>\n<\/div>\n<div style=\"padding: 14px 18px;\">\n<p style=\"margin: 0; color: #555; font-size: 14px; line-height: 1.7;\">Physically, yes in many cases \u2014 but confirm whether the application&#8217;s duty cycle, shock load profile, and motor connection method are compatible with the RV Series before substituting. If the original WP installation is in a heavy-duty continuous-duty environment with shock loads, substituting an RV Series unit may result in premature failure. If it is an OEM machine or moderate-duty application, the RV Series is the correct and often more practical choice.<\/p>\n<\/div>\n<\/div>\n<div style=\"border: 1px solid #dde5f0; border-radius: 6px; overflow: hidden; margin-bottom: 14px;\">\n<div style=\"background: #eef4fc; padding: 14px 18px;\">\n<p style=\"font-weight: bold; color: #1a4b8c; margin: 0; font-size: 15px;\">Is the NMRV the same as the RV Series?<\/p>\n<\/div>\n<div style=\"padding: 14px 18px;\">\n<p style=\"margin: 0; color: #555; font-size: 14px; line-height: 1.7;\">Yes \u2014 NMRV and RV describe the same square-block flange-housing worm gearbox format. The designations originate from different manufacturers but refer to dimensionally interchangeable products across the standard frame sizes (025\u2013150).<\/p>\n<\/div>\n<\/div>\n<div style=\"border: 1px solid #dde5f0; border-radius: 6px; overflow: hidden; margin-bottom: 40px;\">\n<div style=\"background: #eef4fc; padding: 14px 18px;\">\n<p style=\"font-weight: bold; color: #1a4b8c; margin: 0; font-size: 15px;\">Do both series offer the same gear ratios?<\/p>\n<\/div>\n<div style=\"padding: 14px 18px;\">\n<p style=\"margin: 0; color: #555; font-size: 14px; line-height: 1.7;\">For single-stage, yes \u2014 both offer 5:1 to 100:1. For double-stage, the RV Series reaches up to 3,600:1 (two RV stages in series), while the WP Series reaches 200:1 to 900:1 (two WP stages). The WP double-stage is a more robust arrangement for sustained low-speed heavy industrial drives; the RV dual-stage is suited to light-load applications requiring very low output speeds.<\/p>\n<\/div>\n<\/div>\n<p><!-- Related Links --><\/p>\n<div style=\"background: #eef4fc; border-radius: 8px; padding: 24px 22px;\">\n<div style=\"display: flex; flex-wrap: wrap; gap: 10px;\"><\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>The RV Series (NMRV) and WP Series are both worm gearboxes \u2014 they share the same 90\u00b0 right-angle power transmission principle and similar gear material specifications. But they are designed for different application profiles, and choosing the wrong one for an installation means either over-engineering a straightforward OEM drive or under-specifying a heavy industrial load. [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[109],"tags":[],"class_list":["post-1950","post","type-post","status-publish","format-standard","hentry","category-gearbox-reducer"],"_links":{"self":[{"href":"https:\/\/metalite.net\/ru\/wp-json\/wp\/v2\/posts\/1950","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/metalite.net\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/metalite.net\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/metalite.net\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/metalite.net\/ru\/wp-json\/wp\/v2\/comments?post=1950"}],"version-history":[{"count":3,"href":"https:\/\/metalite.net\/ru\/wp-json\/wp\/v2\/posts\/1950\/revisions"}],"predecessor-version":[{"id":1960,"href":"https:\/\/metalite.net\/ru\/wp-json\/wp\/v2\/posts\/1950\/revisions\/1960"}],"wp:attachment":[{"href":"https:\/\/metalite.net\/ru\/wp-json\/wp\/v2\/media?parent=1950"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/metalite.net\/ru\/wp-json\/wp\/v2\/categories?post=1950"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/metalite.net\/ru\/wp-json\/wp\/v2\/tags?post=1950"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}