Description
What Is a Splined Yoke 13 With Collar?
The Splined Yoke 13 With Collar is a critical connection component used within PTO drive shaft assemblies across a wide range of agricultural and light-industrial machinery. The collar feature—sometimes called a locking collar or retaining collar—provides a secondary retention point on the splined bore, preventing axial displacement under high-torque or vibration-intensive conditions. This is particularly valuable on UK farms where ground conditions regularly subject driveline components to unpredictable shock loads: think heavy cultivation behind a high-horsepower tractor, or bale transport on uneven Lincolnshire or Yorkshire terrain.
Carrying a standard 1 3/8″ bore diameter (E = Φ13 on the majority of series) with either Z6 or Z21 spline configurations, the yoke interfaces directly with standard tractor PTO output shafts in compliance with ISO 500 and ASAE S303 dimensional standards. The Φ16 variant available in the 8.0513C / 8.0513E models extends compatibility to heavier-duty drive-shaft assemblies often found in municipal or construction equipment in Britain. Whether sourced for replacement on an ageing Fendt driveline or as original equipment on a newly assembled spreader, these yokes deliver the geometric precision that keeps power transfer smooth and losses minimal.
Ever-Power manufactures the Splined Yoke 13 With Collar series across twelve distinct model configurations—from compact 1.0513B to heavy-duty 8.0513E—covering A-dimension cross sections between 22 mm and 36 mm and C-dimension overall lengths from 100 mm to 137 mm. The result is a product family broad enough to satisfy most OEM replacement scenarios without the delays typical of custom fabrication, keeping British machinery operators productive through the season.
Why Choose Ever-Power Splined Yoke 13 With Collar
Collar Retention Under Shock Load
The integrated collar prevents the yoke from walking off the splined shaft during high-vibration work cycles such as rotavation or disc cultivation—a common failure point on uncollarred designs.
ISO-Compliant Spline Geometry
Z6 and Z21 spline profiles are machined to ISO 500 tolerances, ensuring drop-in fit with all major tractor brands sold in the UK market including John Deere, New Holland, Massey Ferguson, and CLAAS.
Hardened Alloy Steel Construction
Case-hardened and precision-ground from 20CrMnTi or equivalent alloy steel, delivering surface hardness suited to cyclical torque transmission without accelerated spline wear—critical for long UK harvest seasons.
Broad Series Compatibility
With twelve model variants across Series 1 through 8N and 36, the range satisfies light orchard machinery up to heavy-duty agricultural power takeoff assemblies without resorting to custom engineering lead times.
Rapid UK Dispatch & Technical Support
Stock held ready for prompt export dispatch to England, Scotland, Wales, and Northern Ireland. Our application engineers are reachable Monday through Friday for dimension cross-checking before you place an order.
Surface Treatment for Corrosion Resistance
Zinc phosphate plus anti-rust oil finish as standard, with optional zinc plating available for components destined for coastal or high-humidity environments common across the British Isles.
Material, Working Principle & Application Scenarios
Material Stack
The yoke body is cold-forged from 20CrMnTi alloy steel—a low-carbon chromium-manganese-titanium grade that responds well to carburising heat treatment. Post-forging, spline teeth are hobbed to DIN 5480 tolerances and case-hardened to 58–62 HRC at the tooth surface. The collar is machined integral to the body, avoiding welded joints that can introduce stress concentration under torsional cycling. A zinc phosphate conversion coating is applied as the final surface treatment, giving a baseline salt-spray resistance and improving lubricant retention in the spline bore.
How It Works
The yoke slots onto the tractor PTO stub shaft or gearbox output via the splined bore, transmitting rotational torque from the power source to the driven implement. The 1 3/8″ bore (E = Φ13) matches the near-universal ISO 500 Class 2 stub shaft found on British tractors from 35 kW upwards. The collar, positioned just behind the splined engagement zone, bears against the face of the shaft guard or an internal circlip groove to prevent the yoke from sliding rearward under thrust reversals—a condition that can arise during sudden braking or direction changes on hillside pasture work common in Wales, Cumbria, and the Scottish Borders.
Typical Application Scenarios in the UK
- Arable farming: rotavators, power harrows, seed drills across East Anglian flatlands
- Livestock: muck spreaders, silage choppers on Welsh and Northern English hill farms
- Horticultural: flail mowers, turf aerators on market-garden sites in the Home Counties
- Construction & groundscare: post-hole borers, road verge mowers operated by councils
- OEM assembly: UK-based agricultural implement manufacturers requiring high-volume splined yoke supply
Technical Specifications
Splined Yoke 13 With Collar — Full Series Dimension Table
Dimensional reference drawing (A, B, C, D, E parameters)
| Series | A (mm) | B (mm) | C (mm) | D (mm) | E (mm) | F (Spline) |
|---|---|---|---|---|---|---|
| 1.0513B | 22 | 54 | 100 | 26 | Φ13 | 1 3/8″Z6 |
| 1.0513D | 1 3/8″Z21 | |||||
| 2.0513B | 23.8 | 61.3 | 102 | 26 | Φ13 | 1 3/8″Z6 |
| 2.0513D | 1 3/8″Z21 | |||||
| 3.0513B | 27 | 70 | 111 | 26 | Φ13 | 1 3/8″Z6 |
| 3.0513D | 1 3/8″Z21 | |||||
| 4.0513B | 27 | 74.6 | 111 | 26 | Φ13 | 1 3/8″Z6 |
| 4.0513D | 1 3/8″Z21 | |||||
| 5.0513B | 30.2 | 80 | 117 | 26 | Φ13 | 1 3/8″Z6 |
| 5.0513D | 1 3/8″Z21 | |||||
| 6.0513B | 30.2 | 92 | 123 | 26 | Φ13 | 1 3/8″Z6 |
| 6.0513D | 1 3/8″Z21 | |||||
| 6.0513C | 26 | Φ13 | 1 3/8″Z6 | |||
| 6.0513E | 1 3/8″Z21 | |||||
| 7.0513B | 30.2 | 106.5 | 137 | 26 | Φ13 | 1 3/8″Z6 |
| 7.0513D | 1 3/8″Z21 | |||||
| 36.0513B | 36 | 89 | 123 | 26 | Φ13 | 1 3/8″Z6 |
| 36.0513D | 1 3/8″Z21 | |||||
| 7N.0513B | 35 | 94 | 123 | 26 | Φ13 | 1 3/8″Z6 |
| 7N.0513D | 1 3/8″Z21 | |||||
| 8.0513B | 35 | 106.5 | 137 | 26 | Φ13 | 1 3/8″Z6 |
| 8.0513D | 1 3/8″Z21 | |||||
| 8.0513C | 35 | 106.5 | 137 | 26 | Φ16 | 1 3/4″Z6 |
| 8.0513E | 1 3/4″Z20 |
All dimensions are nominal. Contact us for tolerance certificates or non-standard bore requirements.
Complete PTO Drive Shaft Range
The Splined Yoke 13 With Collar is designed to work within Ever-Power’s complete PTO drive shaft system. Below are the four main shaft series available for UK agricultural and industrial applications.
PTO Drive Shaft G Series
General-purpose series for light to medium agricultural implements. Compact profile, broad spline compatibility, widely used on UK market tractor-mounted equipment.
PTO Drive Shaft S Series
Standard heavy-duty series designed for high-torque PTO applications. Reinforced cross-journal and larger tube diameter suit demanding cultivating and baling operations.
PTO Drive Shaft L Series
Long-length series for extended reach between tractor and trailed implement. Popular with contractors running large-acreage combinable crop machinery across England’s Eastern counties.
PTO Drive Shaft T Series
Telescopic high-performance series with overrunning clutch options. Ideal for PTO-driven pumps, generators, and professional vegetation-management equipment operated by UK grounds-care contractors.
Customer Success Story
A real-world example of how Ever-Power Splined Yoke 13 With Collar components solved a field problem for a British agricultural machinery dealer.
UK Agricultural Machinery Dealer — Lincolnshire, England
Sector: Arable Farming Supplies — Volume: 2,400 units/year
A Lincolnshire-based agricultural parts dealership supplying PTO replacement components to arable farms across the East Midlands had been experiencing recurring warranty claims on a competitor-sourced splined yoke product. The collar retention failed on about 12% of units within the first season, a failure rate that was damaging the dealer’s reputation with local growers running high-output rotary cultivators on heavy clay soils. After reviewing product samples and requesting dimensional certification from three suppliers, the dealer switched to Ever-Power Splined Yoke 13 With Collar Series 6 and Series 7 units for the majority of their replacement stock.
Over two full harvest and cultivation seasons, warranty return rates dropped to below 0.5%. The dealer reports that customers specifically value the fit consistency between units—important when a farm fitter is swapping components at the headland rather than in a workshop. Ever-Power’s ability to supply both Z6 and Z21 variants as a bundled order from a single source simplified the dealership’s stock management significantly, reducing the number of supplier relationships needed for this product category from three down to one.
What Our Customers Say
“We fitted Series 5 yokes to twelve of our customer’s power harrows before last autumn’s drilling campaign. None came back with collar issues. The spline finish was noticeably cleaner than what we were getting from our previous supplier in Germany.”
James H. — Agricultural Engineer, Norfolk, UK
“Ordered 200 units of 7.0513B and 7.0513D for our OEM rotavator build programme. Delivery was on schedule, dimensional reports matched the drawing, and the phosphate finish held well even on units stored in our damp workshop over winter. Will be reordering.”
Rachel T. — Procurement Manager, Implement Manufacturer, Lincolnshire
“Quick response from the technical team when I asked about the 8.0513C variant for a heavier-duty flail mower rebuild. They confirmed the Φ16 bore spec and sent a drawing within the day. Component quality matches the documentation exactly. Good business to deal with.”
David M. — Workshop Foreman, Groundscare Contractor, Yorkshire
Manufacturing Capability & Custom Orders
Ever-Power operates a vertically integrated manufacturing facility equipped with multi-axis CNC hobbing, broaching, and gear-grinding machinery capable of holding spline tooth tolerances to within ±0.01 mm on bore diameter and ±0.02 mm on overall length. Raw material traceability is maintained from billet to finished component, with material test certificates available on request for OEM or quality-audited customers. The production capacity across the Splined Yoke 13 With Collar range exceeds 50,000 units per month, supporting both high-volume OEM contracts and smaller scheduled-delivery programmes for UK agricultural parts distributors.
Custom engineering is a particular strength of the Ever-Power team. Beyond the standard series listed in the specification table, we routinely produce modified variants to customer drawings—altered collar positions, non-standard bore diameters, alternative surface treatments (e.g. hard chrome, black oxide, or hot-dip galvanising for coastal applications), and custom-length B or C dimensions. OEM laser marking, packaging to customer specification, and private-label arrangements are all available. If your application sits outside the standard catalogue, simply send us a drawing or describe the operating conditions and we will respond with a feasibility assessment and indicative cost within 48 hours.
Frequently Asked Questions
Common questions from UK agricultural engineers and procurement managers about the Splined Yoke 13 With Collar.
Ready to Source Splined Yoke 13 With Collar for Your UK Operation?
Whether you need a single replacement or a high-volume OEM programme, our technical team can confirm series compatibility and turn around a competitive quote fast. Send your enquiry today.
edit by gzl
