{"id":1319,"date":"2026-07-17T05:33:37","date_gmt":"2026-07-17T05:33:37","guid":{"rendered":"https:\/\/metalite.net\/?post_type=product&p=1319"},"modified":"2026-07-17T05:52:49","modified_gmt":"2026-07-17T05:52:49","slug":"307-series-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/metalite.net\/tr\/urun\/307-series-planetary-gearbox\/","title":{"rendered":"307 Series Planetary Gearbox \u2014 12,500 Nm Inline Industrial Reducer, Replacement for Bonfiglioli 307"},"content":{"rendered":"
\n

<\/p>\n

\n

Drop-In Bonfiglioli 307 Replacement<\/p>\n

307 Series Planetary Gearbox \u2014 12,500 Nm Inline Industrial Gear Reducer<\/h2>\n

The 307 Series is a heavy-duty industrial planetary gearbox<\/strong> rated at 12,500 Nm peak output torque, covering gear ratios from 3.4 to 9,000. Engineered as a direct-mount replacement for Bonfiglioli 307L1, 307L2, 307L3, 307L4, 307R2, 307R3, and 307R4 units, it accepts IEC\/NEMA motor flanges, hydraulic piston motors, orbit motors, and solid input shafts without adapter modification. The inline Planetary Gear Reducer<\/strong> architecture keeps the footprint compact while transmitting up to 540 kW \u2014 suited for demanding mobile, agricultural, and fixed-plant applications.<\/p>\n<\/div>\n

\"307<\/p>\n

Planetary Gearbox Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Series<\/td>\n307 Series (307L1 \/ 307L2 \/ 307L3 \/ 307L4 \/ 307R2 \/ 307R3 \/ 307R4)<\/td>\n<\/tr>\n
Rated Output Torque<\/td>\n12,500 Nm<\/strong><\/td>\n<\/tr>\n
Max. Transmissible Power<\/td>\nUp to 540 kW<\/td>\n<\/tr>\n
Gear Ratio Range<\/td>\n3.4 \u2013 9,000<\/td>\n<\/tr>\n
Stage Variants<\/td>\nL1 (1-stage), L2 (2-stage), L3 (3-stage), L4 (4-stage), R2 \/ R3 \/ R4 (with ring-output)<\/td>\n<\/tr>\n
Gear Unit Configuration<\/td>\nInline<\/td>\n<\/tr>\n
Output Mounting<\/td>\nFoot & flange mounted<\/td>\n<\/tr>\n
Output Shaft Options<\/td>\nSolid with key \/ Splined solid \/ Splined hollow \/ Hollow with shrink disc<\/td>\n<\/tr>\n
Input Configurations<\/td>\nFlanged axial-piston hydraulic motor \u00b7 Orbit motor \u00b7 IEC & NEMA adaptors \u00b7 Solid shaft<\/td>\n<\/tr>\n
Brake Options<\/td>\nHydraulically released parking brake \u00b7 DC electric brake \u00b7 AC electric brake<\/td>\n<\/tr>\n
Bonfiglioli Cross-Reference<\/td>\n307L1 \u00b7 307L2 \u00b7 307L3 \u00b7 307L4 \u00b7 307R2 \u00b7 307R3 \u00b7 307R4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

Full 300-Series Torque Range \u2014 Where 307 Fits<\/h2>\n

We stock the complete 300-series line from 1,000 Nm to 500,000 Nm. The table below positions the 307 within the family, so you can upgrade or downgrade without changing your mounting envelope.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Series<\/th>\nModels<\/th>\nTorque (Nm)<\/th>\n<\/tr>\n<\/thead>\n
300L<\/td>\n300L1\u2013300L4<\/td>\n1,000<\/td>\n<\/tr>\n
301L<\/td>\n301L1\u2013301L4<\/td>\n1,750<\/td>\n<\/tr>\n
303L<\/td>\n303L1\u2013303L4<\/td>\n2,500<\/td>\n<\/tr>\n
305L<\/td>\n305L1\u2013305L4<\/td>\n5,000<\/td>\n<\/tr>\n
306L<\/td>\n306L1\u2013306L4<\/td>\n8,500<\/td>\n<\/tr>\n
307L \u2605<\/td>\n307L1\u2013307L4 \/ 307R2\u2013307R4<\/td>\n12,500<\/td>\n<\/tr>\n
309L<\/td>\n309L1\u2013309L4<\/td>\n18,000<\/td>\n<\/tr>\n
310L<\/td>\n310L1\u2013310L4<\/td>\n25,000<\/td>\n<\/tr>\n
311L<\/td>\n311L1\u2013311L4<\/td>\n40,000<\/td>\n<\/tr>\n
313L<\/td>\n313L1\u2013313L4<\/td>\n55,000<\/td>\n<\/tr>\n
315L<\/td>\n315L1\u2013315L4<\/td>\n100,000<\/td>\n<\/tr>\n
316L<\/td>\n316L1\u2013316L4<\/td>\n135,000<\/td>\n<\/tr>\n
317L<\/td>\n317L1\u2013317L4<\/td>\n170,000<\/td>\n<\/tr>\n
318L<\/td>\n318L1\u2013318L4<\/td>\n250,000<\/td>\n<\/tr>\n
319L<\/td>\n319L1\u2013319L4<\/td>\n350,000<\/td>\n<\/tr>\n
321L<\/td>\n321L1\u2013321L4<\/td>\n500,000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

Key Features of the 307 Series Planetary Gear Reducer<\/h2>\n
    \n
  • \u2192<\/span>
    \n12,500 Nm rated output torque<\/strong> \u2014 handles continuous heavy loads in winch, conveyor, and slewing-drive duty cycles without de-rating.<\/li>\n
  • \u2192<\/span>
    \nGear ratios 3.4 to 9,000 in a single housing line<\/strong> \u2014 L1 through L4 stage variants let you hit the exact output RPM without a secondary reducer.<\/li>\n
  • \u2192<\/span>
    \nDirect replacement for Bonfiglioli 307L1\u2013307R4<\/strong> \u2014 same bolt-circle, same shaft dimensions. No adapter plates, no custom machining required.<\/li>\n
  • \u2192<\/span>
    \nFour output shaft configurations<\/strong> \u2014 solid keyed, splined solid, splined hollow, and hollow with shrink disc cover most OEM interface requirements.<\/li>\n
  • \u2192<\/span>
    \nUniversal input interface<\/strong> \u2014 accepts IEC\/NEMA flanged electric motors, flanged axial-piston hydraulic motors, orbit motors, or a plain solid shaft.<\/li>\n
  • \u2192<\/span>
    \nIntegrated brake options<\/strong> \u2014 hydraulically released parking brake for mobile machines; DC or AC electric brake for fixed-plant and automated lines.<\/li>\n
  • \u2192<\/span>
    \nUp to 540 kW transmissible power<\/strong> \u2014 a capacity margin that accommodates shock loads common in agricultural and mining operations.<\/li>\n<\/ul>\n

    <\/p>\n

    How to Calculate the Gear Ratio of a Planetary Gearbox<\/h2>\n

    Selecting the right ratio for your 307 Series industrial planetary gearbox starts with one formula. For a standard planetary stage where the ring gear is fixed:<\/p>\n

    \n

    i = 1 + (Zring<\/sub> \/ Zsun<\/sub>)<\/p>\n

    i<\/span> = gear ratio \u00a0|\u00a0 Zring<\/sub><\/span> = number of ring-gear teeth \u00a0|\u00a0 Zsun<\/sub><\/span> = number of sun-gear teeth<\/p>\n<\/div>\n

    Example \u2014 307L single stage:<\/strong> A ring gear with 72 teeth and a sun gear with 24 teeth gives i = 1 + (72 \/ 24) = 4:1<\/strong>.<\/p>\n

    Multi-stage units (L2, L3, L4):<\/strong> Multiply the individual stage ratios together. A 307L3 with three stages of 4:1, 5:1, and 7:1 delivers a total ratio of 4 \u00d7 5 \u00d7 7 = 140:1<\/strong>.<\/p>\n

    Practical conversion formula:<\/strong> Output speed (RPM) = Input speed (RPM) \u00f7 i. If your motor runs at 1,450 RPM and you need 10 RPM at the output, the required ratio is 1,450 \u00f7 10 = 145:1<\/strong> \u2014 achievable with a 307L3 at the right tooth counts. Contact us with your motor RPM and target output speed; we will confirm the correct stage variant.<\/p>\n

    \"Application<\/p>\n

    Application Areas for the 307 Industrial Planetary Gearbox<\/h2>\n
    \n
    \n

    Agricultural Machinery<\/p>\n

    Tractor PTOs, combine drives, and irrigation pump heads requiring compact, high-torque output in dusty, vibration-heavy environments.<\/p>\n<\/div>\n

    \n

    Winch & Hoist Systems<\/p>\n

    Marine deck winches, crane slewing rings, and construction hoists where load-holding under the integrated parking brake is mandatory.<\/p>\n<\/div>\n

    \n

    Conveyor & Mixer Drives<\/p>\n

    Bulk-material conveyors, twin-shaft mixers, and packaging line drives that run 24\/7 and need consistent torque without thermal runaway.<\/p>\n<\/div>\n

    \n

    Construction & Mining<\/p>\n

    Drill-head drives, road planers, and tunnelling equipment where impact loads can briefly exceed nominal torque by 2\u20133\u00d7.<\/p>\n<\/div>\n

    \n

    Renewable Energy<\/p>\n

    Solar tracker slewing drives and small-scale wind-turbine pitch-control systems demanding precise, backlash-controlled positioning.<\/p>\n<\/div>\n<\/div>\n

    <\/p>\n

    Complete Agricultural Power Drive Solution<\/h2>\n

    The 307 Series planetary gearbox works as the torque hub in a broader drivetrain. Below is a matched power package for a mid-size agricultural or materials-handling application \u2014 every component is sourced from our catalogue so you receive a single BOM and one freight shipment.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n
    Component<\/th>\nRecommended Spec<\/th>\nRole in System<\/th>\n<\/tr>\n<\/thead>\n
    Electric Motor<\/td>\nIE3 \/ 75\u2013110 kW, 4-pole, IEC B5 flange<\/td>\nPrime mover \u2014 flanges directly to 307L input adaptor<\/td>\n<\/tr>\n
    307L3 Planetary Gearbox<\/td>\n12,500 Nm \u00b7 Ratio 100\u2013200:1 \u00b7 Solid-keyed output<\/td>\nSpeed reduction and torque multiplication<\/td>\n<\/tr>\n
    Winch Drum<\/td>\n\u00d8 320 mm \u00d7 600 mm, 8 mm wire rope, 12-tonne SWL<\/td>\nConverts rotary output to linear cable pull<\/td>\n<\/tr>\n
    Drive Sprocket<\/td>\nANSI #100 chain, 17T, bored to suit splined output<\/td>\nSecondary chain stage to driven shaft<\/td>\n<\/tr>\n
    PTO Drive Shaft<\/td>\nSeries 6 cross-joint, 1-3\/4\u2033 20-spline, 1,000 RPM<\/td>\nTransmits power to remote implement from gearbox output<\/td>\n<\/tr>\n
    Hydraulic Brake Valve<\/td>\nCounterbalance valve, 350 bar, G 3\/4\u2033 ports<\/td>\nWorks with built-in parking brake for load holding<\/td>\n<\/tr>\n
    Coupling \/ Jaw<\/td>\nElastomeric jaw coupling, 12,000 Nm, 95 Shore A<\/td>\nAbsorbs shock pulses between motor and gearbox<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    \u2605 Custom BOM available on request \u2014 specify your motor brand, output shaft interface, and duty cycle and we will configure the matched package.<\/p>\n

    <\/p>\n

    Planetary Gearbox Repair: When to Rebuild vs. Replace<\/h2>\n

    Not every fault justifies a full replacement. Here is a practical decision framework built around the 307 Series and its Bonfiglioli-equivalent units:<\/p>\n