Descripción
PTO Drive Shaft Components — Agricultural & Industrial Supply, UK
Lemon Yoke for PTO Drive Shafts — Precision-Engineered for UK Farm & Industrial Machinery
High-strength lemon yokes engineered to deliver reliable torque transfer on tractors, combine harvesters, balers, slurry tankers, and wide-span sprayers across Great Britain and Northern Ireland. Compliant with European CE standards, stocked for rapid UK despatch.
Request a Quote or Sample
Our UK-based sales team is ready to assist with bespoke lemon yoke configurations, pricing for bulk orders, and technical support. Custom bore sizes, keyway profiles, and surface treatments are available on request — minimum lead times apply for stocked series.
Typical response within 12 business hours
What Is a Lemon Yoke — and Why Does It Matter for Your PTO Line?
A lemon yoke — so named for the distinctive lemon-shaped profile of its drive bore — is a critical interface component connecting the PTO driveline to implement gearboxes, pumps, or intermediate shafts. Unlike standard round-bore yokes, the lemon bore’s flattened geometry creates a positive mechanical lock with the corresponding shaft, eliminating the risk of rotational slip under high-torque or shock-load conditions. This makes the lemon yoke the preferred choice wherever sudden engagement loads are common: mowing, flail hammering, slurry agitation, or baler pick-up systems.
In UK agriculture, PTO-driven implements routinely operate in demanding field conditions — wet clay soils, uneven terrain, and variable engine loads — making connection integrity absolutely non-negotiable. Our lemon yokes are machined from high-grade alloy steel with tight dimensional tolerances to ensure consistent power transfer across the full rated torque range of each driveline series, season after season.
Key Advantages of Our Lemon Yoke Range
Anti-Slip Lemon Bore Profile
The lemon-shaped bore geometry interlocks mechanically with the shaft flat, preventing rotational play even under repeated shock loads from field implements.
Alloy Steel Construction
Forged and machined from 35CrMo or equivalent high-tensile alloy steel, heat-treated for fatigue resistance and long service life under continuous field duty.
18-Series Size Range
From compact 1.06L to heavy-duty 36.07L, covering virtually every PTO-driven implement from light rotary cutters to large-diameter slurry pump drives.
CE-Compliant, UK Market Ready
Designed and tested to meet European agricultural machinery standards (EN ISO 5674), with export documentation available for UKCA-aligned requirements post-Brexit.
Corrosion-Resistant Finishing
Yellow zinc chromate or black phosphate coating options protect against moisture, slurry splash, and winter salt spray — essential for year-round UK field operations.
Custom Configuration Available
Non-standard bore diameters, spline profiles, keyway dimensions, and weld-on flanges can be produced to your engineering drawings or sample — ask about our OEM programme.
Technical Specifications
All dimensions in mm. Series suffix: 06 = standard cross kit; 07 = light cross kit. A = bore diameter; B = flange O.D.; C = overall yoke length; D = lug width (outer); E = lug width (inner).
| Serie | A (mm) | B (mm) | C (mm) | D (mm) | E (mm) |
|---|---|---|---|---|---|
| 1.06L | 22 | 54 | 77 | 30 | 39 |
| 1.07L | 22 | 54 | 77 | 23.7 | 30.8 |
| 2.06L | 23.8 | 61.3 | 82 | 41.2 | 48 |
| 2.07L | 23.8 | 61.3 | 82 | 34.5 | 40.1 |
| 3.06L | 27 | 70 | 90 | 41.2 | 48 |
| 3.07L | 27 | 70 | 90 | 34.5 | 40.1 |
| 4.06L | 27 | 74.6 | 90 | 41.2 | 48 |
| 4.07L | 27 | 74.6 | 90 | 34.5 | 40.1 |
| 5.06L | 30.2 | 80 | 98 | 48 | 57.5 |
| 5.07L | 30.2 | 80 | 98 | 39.5 | 49 |
| 32.06L | 32 | 76 | 98 | 48 | 57.5 |
| 32.07L | 32 | 76 | 98 | 39.5 | 49 |
| 6.06L | 30.2 | 92 | 104 | 48 | 57.5 |
| 6.07L | 30.2 | 92 | 104 | 39.5 | 49 |
| 7N.06L | 35 | 94 | 106 | 48 | 57.5 |
| 7N.07L | 35 | 94 | 106 | 39.5 | 49 |
| 36.06L | 36 | 89 | 106 | 48 | 57.5 |
| 36.07L | 36 | 89 | 106 | 39.5 | 49 |
How It Works — Principle, Material & Application
📌 Operating Principle
The lemon yoke connects to the PTO driveshaft tube and the universal joint cross at one end of the driveline. The lemon-profiled bore seats over a correspondingly shaped stub shaft or cross-bore pin, creating a positive rotational lock. Unlike a plain round bore, the flat on the lemon shape transmits torque through a wide surface contact area rather than relying solely on a pinch bolt or friction grip. This dramatically reduces fretting wear at the bore face, particularly under the oscillating torque loads typical of variable-speed field implements. The yoke wings then cradle the journal bearings of the cross kit, enabling the angular deflection that allows implements to follow ground contours.
⚙ Material & Manufacturing
Every lemon yoke in our range is forged from 20CrMnTi or 35CrMo medium-alloy steel, selected for its combination of high yield strength (min. 835 MPa) and good impact toughness — vital when a baler or flail mower strikes a buried stone. After rough machining, yokes undergo carburising and quench-hardening to achieve a case depth of 0.8–1.2 mm and a surface hardness of 58–62 HRC at the bore and wing faces, while the body remains tough at 28–32 HRC. Final grinding of the bore and seating faces is performed on CNC honing machines to hold a tolerance of H7/h6, ensuring consistent assembly with matched cross kits across our full product line.
🌿 UK Agricultural Application Scenarios
Lemon yokes see daily use across some of Britain’s most demanding agricultural machinery: rear-discharge slurry tankers running continuous PTO pump drives across Yorkshire dairy farms; Claas and New Holland balers operating on stony Cotswold hillside fields; wide-cut rotary mowers on Scottish Highland estates; sugar beet harvesters in Lincolnshire fenland working 20-hour harvest days. Beyond agriculture, they are also specified for light industrial applications — quarry conveyor drives, portable pump units, and hedge-cutting attachments on local authority maintenance vehicles throughout England, Scotland, and Wales.
Customer Success Stories
Real results from UK & European agricultural businesses using our lemon yokes.
⭐⭐⭐⭐⭐
“We operate twelve slurry tankers across three farms in Cumbria and burn through driveline components every season. Since switching to Ever-Power lemon yokes on our Series 5 driveshafts, we’ve had zero bore-related failures in two full muck-spreading seasons. The fit on the pump stub shaft is noticeably tighter than our previous supplier. Lead time from China was under three weeks and the technical team answered our cross-reference questions on the same day.”
— James H., Farm Manager
Dairy & Arable Operation, Penrith, Cumbria, UK
⭐⭐⭐⭐⭐
“As a machinery dealer serving the Lincolnshire wolds, we need a reliable source of lemon yokes across multiple series at trade prices. Ever-Power’s range covers our entire retrofit catalogue — from small 1.06L units for compact tractor PTO accessories through to the 7N series for our high-output baling customers. Packaging is correct, labelling clear, and we haven’t had a single quality return in eighteen months. Highly recommended for trade buyers looking to consolidate their driveline component sourcing.”
— Richard B., Parts Manager
Agricultural Machinery Dealership, Horncastle, Lincolnshire, UK
⭐⭐⭐⭐⭐
“We maintain a fleet of PTO-driven road-verge mowers for local authority contracts across the West Midlands. The biggest failure point historically has always been the yoke bore on the implement-side connection — the shock loads from cutting through woody material and debris are brutal on standard components. The Ever-Power 6.06L lemon yokes have outlasted our previous OEM parts by roughly three to one in our maintenance log. We now stock them across both our depots and recommend them to other contractors in our network.”
— Darren M., Fleet Maintenance Supervisor
Road Verge & Ground Maintenance Contractor, Wolverhampton, UK
Our Manufacturing Facility & Custom Engineering Capability
Production at Scale, Precision at Part Level
Our main facility operates 47 CNC turning centres, 12 vertical machining centres, and 6 dedicated honing lines, running two shifts to maintain output across our lemon yoke range and the broader PTO driveline catalogue. Raw material is sourced from nationally certified steel mills with full mill cert traceability to finished batch. The quality lab runs dimensional audits on every batch using CMM equipment, and a random destructive test sample is taken from each heat-treatment run for hardness verification. All finished yokes are pressure-cleaned, inspected under LED inspection lamps, and bagged individually with corrosion inhibitor film before packing.
🔨 Custom & OEM Lemon Yoke Production
We have supported OEM customers who require modifications to the standard lemon bore geometry — including oversized flats for high-torque implement shafts, dual locking flats (double-D profiles), extended wing lengths for modified cross kit spans, and weld-prep stub ends for permanent driveline assemblies. Our engineering team can work from a customer sketch, a worn sample, or a full 3D model in STEP or DXF format. Small-batch prototyping is available from 10 pieces, with production runs typically moving to 500+ within 30 days of first-article approval.
Complete PTO Drive Shaft Series
The lemon yoke is a component used within our wider PTO driveshaft assemblies. If you are sourcing a complete driveline solution for your UK agricultural or industrial application, the following series cover the full spectrum of torque ratings and coupling configurations available from our range:
⚙
PTO Drive Shaft G Series
General-purpose PTO driveshafts suited to light-to-medium implement duty. Popular with UK smallholders and compact tractor operators.
📈
PTO Drive Shaft S Series
Heavy-duty shielded shafts designed for slurry tankers, large balers, and silage equipment operating under continuous high-torque conditions on UK farms.
🔩
PTO Drive Shaft L Series
Lemon-yoke fitted series offering extended telescopic travel for implements requiring significant draft angle variation during operation, such as rear-discharge spreaders.
⚡
PTO Drive Shaft T Series
Heavy torque-limiter integrated shafts for overload-sensitive implements including rotary tillers and mulchers — reducing risk of gearbox damage on stone-strewn UK arable ground.
Preguntas frecuentes
What is the difference between a lemon yoke and a standard round-bore yoke for a PTO drive shaft, and which one should I choose for my UK farm equipment?
A standard round-bore yoke relies on a pinch bolt or friction fit to secure it to the shaft, which can develop play over time under repeated torque reversals. A lemon yoke has a flattened bore that interlocks with a matching flat on the driveshaft stub, creating a positive mechanical lock. For UK agricultural applications involving shock loads — balers, flail mowers, slurry pumps — the lemon yoke is nearly always the better choice because it maintains consistent bore engagement without tightening checks between field sessions.
How much does a replacement lemon yoke cost for a Series 5 PTO driveshaft, and can I get a bulk trade price as a UK agricultural machinery dealer?
Pricing varies by series, bore size, and order quantity. We supply directly to UK dealers, agricultural merchants, and farm machinery workshops at trade prices with volume tiers starting from 10 pieces. To receive a current price list or a tailored quotation for your dealership’s typical demand, please email [email protected] with your series requirements and approximate monthly volume — our team will respond within one working day.
Which lemon yoke series is compatible with Claas or New Holland baler PTO driveshafts commonly used on UK arable farms?
Most mid-size round balers from Claas (Rollant 350–455) and New Holland (Roll-Belt 450–560) use driveshafts in the Series 4 to Series 6 range, typically with 06 or 07 cross kits. The corresponding lemon yokes would be 4.06L, 5.06L, 5.07L, 6.06L, or 6.07L depending on the specific model year and driveshaft generation. If you send us your implement’s existing shaft cross-reference or a photo of the worn yoke, we can confirm the correct part number before you order — contact us at [email protected].
Where can I find a reliable supplier of PTO lemon yokes with fast despatch to England, Scotland, or Wales?
We supply directly from factory to UK-based buyers via express international freight, with typical transit times of 7–14 working days for stocked items. We work with established freight forwarders covering Great Britain and Northern Ireland and can arrange delivery to port, warehouse, or dealer premises. For urgent requirements during harvest or muck-spreading season, contact us directly and we will advise on the fastest available shipping route for your location.
Can I get a custom lemon yoke manufactured to a non-standard bore size or shaft profile for a specialist UK industrial PTO application?
Yes. Our facility regularly produces lemon yokes to customer-specified drawings for OEM and retrofit applications outside the standard agricultural range. This includes modified bore diameters, non-standard flat geometries, double-flat (double-D) profiles, extended lug spans, and special surface treatments for offshore or chemical industry environments. Minimum order quantities for custom work start at 10 pieces, with prototype single pieces available for design validation. Email your drawing or specification to [email protected] to start the enquiry process.
How do I know when a lemon yoke on my tractor PTO driveshaft needs replacing before it causes damage to the implement gearbox?
The early warning signs are rotational knock or clunking at low PTO rpm during engagement, visible fretting wear or scoring on the bore face when the shaft is withdrawn, and a perceptible rotational play between the yoke and the stub shaft greater than 1–2 degrees. Left unaddressed, a worn lemon bore allows micro-impacts that quickly damage the cross-kit journals, increasing repair cost significantly. We recommend inspection every 200 hours of operation or at the start of each main seasonal campaign — whichever comes first.
Ready to Source Lemon Yokes for Your UK Operation?
Contact our B2B sales team for trade pricing, cross-reference support, and custom engineering enquiries. Serving agricultural merchants, machinery dealers, OEM manufacturers, and farm workshops across England, Scotland, Wales, and Northern Ireland.
