Supreme Feed Mixer PTO Shaft | 700T-1600T Direct Replacement

Precision Engineered PTO Shafts for the Supreme Mixer Series

Replacing a worn or damaged PTO shaft on a high-capacity vertical feed mixer carries real cost consequences: downtime during feeding rounds, potential auger overload damage, and uneven ration delivery across the herd. This replacement PTO shaft is dimensionally matched to the Supreme 700T through 1600T driveline interface, using the 2580 constant velocity (CV) series platform — the same engineering baseline as OEM installations on these mixer generations.

The CV joint design self-corrects for the angular velocity variation that causes vibration in standard Cardan-type U-joints. At 1,000 RPM operating speed — standard for PTO-driven TMR mixers — that correction translates directly to smoother auger rotation, reduced bearing stress, and longer service intervals across the entire driveline.

Whether you operate a single 700T on a beef operation or run a 1600T fleet on a commercial dairy, this shaft is stocked and available for direct B2B sourcing. Custom heavy-duty PTO shaft configurations for the Supreme 1600T and other high-torque installations are available on request — contact our team with your tractor PTO specification and we'll confirm fitment before shipment.

Model Compatibility — Supreme TMR Vertical Feed Mixer

Technical Specifications & Compatibility Details

The following specifications reflect the 2580 Series constant velocity driveline configuration verified for the Supreme TMR mixer range. Two primary CV half-assembly variants cover the full 700T–1600T model span, differentiated by tractor-side spline count and shaft diameter. Confirm your tractor's PTO output spline specification before ordering.

Note: The 1.375"-21 spline configuration covers most standard-duty tractor connections (typically 75–130 HP range). The 1.750"-20 spline variant is required for high-horsepower tractors operating 1600T mixers at full capacity. When in doubt, measure your tractor's PTO output shaft before placing an order.

Heavy-Duty Construction for Demanding Agricultural Environments

TMR feed mixing puts sustained mechanical load on the driveline for hours at a time — silage density, frozen bale cores, and mineral supplements all generate resistance spikes at the auger. The following engineering features address the specific failure modes most commonly reported on vertical feed mixer drivelines:

• 2580-Series Constant Velocity Joint: The dual-joint CV assembly cancels the torque and speed pulsation inherent in single-Cardan designs. At 1,000 RPM, this eliminates the oscillating load that causes premature bearing and yoke wear — particularly relevant when operating at steep hitch angles on uneven barn floors or feedlot surfaces.
• KB61/20 Shear Bolt Overload Clutch (#4250105): When a foreign object enters the mixing tub — wire, a stone, or a frozen block — torque spikes in milliseconds. The shear bolt assembly sacrifices a low-cost bolt rather than the gearbox input shaft or auger drive. Replacement bolts are stocked separately and cost a fraction of a gearbox repair.
• Telescoping Star-Profile Tube: The star-profile inner and outer tube sections maintain torque transmission while allowing the working length to change as the tractor articulates. This is critical for loader tractors where the hitch geometry changes frequently during in-barn feeding.
• Heat-Treated Alloy Steel Splines: Both the 1.375" × 21-spline and 1.750" × 20-spline ends are machined from heat-treated alloy steel, holding dimensional tolerance to ensure positive engagement with the tractor PTO stub and mixer input shaft without backlash.
• Integrated Lubrication Ports: Grease fittings at each universal joint cross and the telescoping tube section allow scheduled maintenance without disassembly. Re-greasing every 50 operating hours is the primary factor in driveline longevity under continuous feed mixing loads.
• Full Replacement PTO Components Available: As a direct supplier, we carry individual replacement PTO components — cross kits, yoke assemblies, guard sections, and shear bolt kits — so operators can service the shaft in the field without replacing the entire assembly.

Enhanced Safety Features: Integrated Guarding & Shielding

A rotating PTO shaft at 1,000 RPM covers the distance from tractor to mixer in a 360° arc of exposure. Guard integrity is not optional — it is the single most important factor in preventing entanglement incidents in livestock operations where multiple operators may be present during feeding.

• Shield Bearing Assembly (#961-3525): The guard is supported independently by a dedicated shield bearing, meaning it remains stationary as the inner shaft rotates. This prevents the guard from spinning loose and eliminates friction contact between guard and shaft that causes wear on both components.
• 360° Full Coverage at Maximum Angle: The guard bell is friction-welded to provide consistent coverage even when the shaft is operating at its maximum articulation angle — a design requirement for in-barn hitch maneuvers where the tractor may swing hard before the mixer is fully engaged.
• Impact-Rated Guard Material: Guard components are rated for cold-weather impact down to -35°C, preventing guard cracking and shattering in winter barn environments — a common failure point on lower-cost aftermarket shafts that use standard-grade polypropylene.
• UV and Ozone Resistant: Guard surfaces maintain their structural integrity when stored outdoors in summer conditions between feeding seasons, reducing replacement frequency and ongoing maintenance costs.

Application Scenarios

This replacement PTO shaft for Supreme TMR feed mixers serves operations across a wide range of livestock production systems:

• Dairy Farms (50–2,000+ head): Daily TMR preparation demands consistent, reliable power delivery. A compromised PTO shaft introduces mixing inconsistencies that affect milk production and cow health — this direct-fit replacement eliminates the diagnostic time lost to vibration-induced ration variation.
• Beef Feedlots: High-throughput operations run mixers continuously through the feeding window. The 2580 CV platform handles sustained high-torque loads without the vibration fatigue failures common on single-Cardan shaft designs at extended run times.
• Sheep & Goat Operations: Smaller mixed-species operations using 700T or 900T Supreme mixers benefit from the same overload protection — shear bolt clutch limits peak torque when processing coarse hay or root vegetables.
• Custom Feeding Contractors: Operators running custom TMR mixing services across multiple farms need a shaft that survives repeated hitch cycles and varied terrain. The telescoping CV design handles the geometry variation between different tractor/mixer pairings without driveline binding.

Frequently Used Together

The PTO shaft is one component in a complete driveline system. B2B buyers sourcing replacement parts for Supreme feed mixers commonly combine this shaft with the following components to complete a full driveline overhaul or preventive maintenance stock:

Common Questions from B2B Buyers

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