Splined Yoke 03-Non-Interfering Bolt

Non-Interfering Bolt Design

The fastener sits fully recessed and clear of the rotating tube, eliminating contact wear that degrades both the guard and the clamping bolt itself during high-RPM operation.

Case-Hardened Carbon Steel

A controlled heat treatment process gives the splined bore a hard outer surface while preserving a tough core, balancing abrasion resistance with impact resilience through the full service life.

Wide Dimensional Range

Sixteen series variants cover bore diameters from 22 mm to 36 mm and four standard spline profiles, making it straightforward to source the exact replacement for virtually any tractor or implement in the UK fleet.

Quick-Change Field Replacement

The non-interfering bolt can be loosened and retightened with a standard spanner without removing the guard, cutting field changeover time dramatically during busy harvesting or cultivation windows.

Corrosion-Resistant Finish

A phosphate-and-oil or zinc-plated surface treatment provides baseline protection against the damp outdoor conditions common across UK farms, extending the serviceable life between scheduled inspections.

Cross-Brand Compatibility

Dimensional compliance with ISO 500 and ASAE S201 spline standards means the 03-series yoke fits John Deere, Fendt, New Holland, Claas, and Massey Ferguson tractor PTO stubs without modification.

Power Transfer Mechanism

The splined bore of the yoke engages directly with the male spline on the tractor or implement stub shaft. Torque is shared across every spline tooth simultaneously, distributing the load far more evenly than a keyed connection. The clamping bolt then closes the split in the yoke bore, generating a controlled interference between the yoke and the shaft that resists axial pullout under the cyclic loads of field operation. Because the bolt head sits recessed in a pocket machined into the yoke flange, it never reaches the rotating guard or the inner tube wall, so the guard remains undamaged and the bolt itself is not subjected to the bending fatigue that plagues conventional bolt-through designs on UK farm PTO shafts.

Material and Surface Treatment

The yoke body is forged from 20CrMnTi or equivalent medium-carbon alloy steel, which offers a tensile strength in the range of 880 MPa to 1,180 MPa depending on section thickness. After machining to final dimension, the splined bore is induction hardened to a case depth of approximately 0.8 mm to 1.2 mm, raising surface hardness to 58 to 62 HRC while the core retains sufficient toughness to absorb shock loads from sudden implement engagement or field obstructions. The external surfaces receive a phosphate conversion coat followed by an oil dip, providing corrosion resistance suitable for the outdoor storage and wet-field conditions that are routine on British arable, dairy, and livestock farms throughout the year.

Grass & Forage Machinery

Mowers, tedders, rakes, and wrappers that run continuously for extended periods during silage and hay seasons across UK grassland farms.

Arable Tillage Equipment

Rotary tillers, power harrows, and stone buriers where high torque at low speed places substantial stress on the PTO drive shaft yoke connection.

Slurry & Irrigation Pumps

Dairy and livestock operations where pump PTO drives run for many hours and the yoke must maintain clamp force without fretting under sustained rotational load.

Hedge & Verge Cutters

Flail and disc cutters on county council and estate maintenance operations, where sudden impact loads from unseen obstructions test yoke integrity repeatedly throughout the cutting season.

Light Industrial Drives

Log splitters, air compressors, and small generators powered by tractor PTO on UK rural estates and smallholdings where a reliable, low-maintenance yoke connection is essential.

PTO Drive Shaft G Series

A general-purpose series suited to standard agricultural implements, offering a balanced combination of torque capacity, articulation angle, and competitive pricing for everyday UK farm use.

PTO Drive Shaft S Series

Engineered for slip-clutch protection applications, the S Series integrates torque-limiting functionality ideal for mowers and balers where sudden load spikes are common during UK harvesting operations.

PTO Drive Shaft L Series

The L Series addresses long-wheelbase tractor-implement configurations, providing extended telescopic travel and wide-angle joint options for machinery working on undulating British terrain.

PTO Drive Shaft T Series

Heavy-duty T Series shafts are built for high-torque applications such as large rotary tillers and commercial spreaders, with robust cross-and-bearing kits rated for the most demanding cultivation schedules.

“Ordered sixteen yokes for our mower fleet in Shropshire. Fitment was straightforward and the dimensional accuracy was exactly what we needed for our New Holland T7 stubs. No issues across two full silage seasons.”

D. Hartley — Farm Manager, Shropshire

“We source PTO components for resale to machinery dealers across the North of England. The 03 series yokes have become one of our fastest-moving SKUs. Lead time and packaging quality both meet professional trade expectations.”

S. Brownlee — Parts Buyer, Agricultural Machinery Distributor, Leeds

“Used the 8.0503C variant on a 1 3/4″ Z6 stub on our large-diameter slurry pump. The spline engagement felt solid from the first engagement. After a full winter spreading programme, there was no visible wear on the bore or the shaft. Very satisfied.”

R. Maguire — Livestock Farmer, County Down, Northern Ireland

Our manufacturing facility operates closed-loop quality control from forging through final inspection, giving us the process stability to hold bore concentricity within 0.02 mm and spline tooth profile to DIN 5480 tolerances across every production batch. Cold forging presses, CNC hobbing machines, and automated heat treatment lines allow the facility to scale output for both small specialist orders and high-volume OEM supply contracts serving UK machinery manufacturers and European agricultural equipment brands.

Importantly, the facility carries genuine customisation capability for buyers who need dimensions outside the standard 03-series range. Non-standard bore diameters, alternative spline profiles (including metric DIN splines and proprietary OEM profiles), special surface treatments such as hot-dip galvanising for coastal UK environments, and modified bolt pocket geometries can all be accommodated. Minimum order quantities for custom variants are negotiable, and our engineering team will work from customer drawings, sample parts, or a dimensional specification sheet. Contact us with your requirements and we will provide a detailed technical and commercial response within two working days.

Request a Custom Quote

Send your drawing, sample reference, or dimensional requirements. We respond within two business days with a full technical and pricing proposal.

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