{"id":3353,"date":"2026-06-24T05:23:52","date_gmt":"2026-06-24T05:23:52","guid":{"rendered":"https:\/\/www.pto-drive-shafts.com\/?post_type=product&p=3353"},"modified":"2026-06-24T05:44:16","modified_gmt":"2026-06-24T05:44:16","slug":"plain-bore-yoke-c-keyway-threaded-hole","status":"publish","type":"product","link":"https:\/\/www.pto-drive-shafts.com\/pl\/produkt\/plain-bore-yoke-c-keyway-threaded-hole\/","title":{"rendered":"Plain Bore Yoke C-Keyway & Threaded Hole"},"content":{"rendered":"
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PTO Drive Shaft Components<\/div>\n

Plain Bore Yoke with C-Keyway & Threaded Hole<\/h2>\n

Engineered for demanding agricultural and industrial PTO drive shaft applications across the United Kingdom, this Plain Bore Yoke with C-Keyway and Threaded Hole delivers precision torque transmission, robust material quality, and exceptional dimensional consistency.<\/p>\n

Get a Quote<\/a><\/p>\n<\/div>\n<\/div>\n

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Why This Yoke Outperforms Standard Alternatives<\/h2>\n
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\u2699\ufe0f<\/div>\n
Dual-Function Bore Design<\/div>\n
The combination of a C-keyway slot and threaded retention hole provides two independent methods of shaft locking. This eliminates wobble under high-cycle torque reversals \u2014 a critical advantage in UK round-baler and telehandler applications where shock loads are common.<\/div>\n<\/div>\n
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\ud83c\udfed<\/div>\n
Precision-Machined Tolerances<\/div>\n
Each bore is machined to tight dimensional tolerances, with keyway slots cut to ISO 773 standards. The result is a yoke that fits the shaft positively the first time \u2014 no shimming, no field rework, and no costly machine downtime on the farm or at the construction site.<\/div>\n<\/div>\n
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\ud83d\udd29<\/div>\n
Stal stopowa o wysokiej wytrzyma\u0142o\u015bci na rozci\u0105ganie<\/div>\n
Manufactured from heat-treated alloy steel with surface hardness tuned for wear resistance without brittleness, these yokes maintain structural integrity across the full operating temperature range typical of outdoor UK working conditions \u2014 from frost to summer heat peaks.<\/div>\n<\/div>\n
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\ud83d\udce6<\/div>\n
Wide Series Coverage<\/div>\n
With eight series spanning bore diameters from 20 mm to 45 mm and series codes 1.05C through 8.05C, the range covers almost every OEM and aftermarket requirement encountered in British agriculture, machinery manufacturing, and light industrial drive systems.<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Material Science Behind the Design<\/h2>\n

\"PlainThe Plain Bore Yoke C-Keyway and Threaded Hole component begins as a billet of medium-carbon alloy steel \u2014 typically a 40Cr or 42CrMo grade \u2014 which is rough-forged to shape before undergoing CNC turning and milling. This forging-first approach aligns the steel’s grain structure with the part’s load-bearing axis, producing measurably higher fatigue resistance compared to yokes cut from bar stock alone. After rough machining, parts proceed through normalising and quench-and-temper heat treatment, achieving a core hardness in the 28\u201334 HRC range, then receive a final precision bore grind so that the internal diameter meets H7 tolerance requirements consistently across production batches.<\/p>\n

The C-keyway geometry is a deliberate engineering choice over a full keyway. By retaining the bottom arc of the bore, the C-cut preserves more material cross-section at the weakest point of a slotted bore, improving resistance to crack initiation under combined torsion and bending. The threaded radial hole \u2014 typically M6 to M14 depending on bore size \u2014 accepts a grub screw that bears directly on the key, preventing the key from walking axially during load reversal cycles. Together, these two features give assembly technicians a belt-and-braces locking strategy that is particularly valued in UK farming applications where PTO shafts on mowers, tedders, and silage machinery routinely experience rapid direction changes.<\/p>\n

Surface protection is applied as an electroplated zinc finish or an epoxy-primer-coated layer depending on customer specification, providing corrosion resistance adequate for outdoor storage and field exposure typical of British conditions. Custom phosphating or hot-dip galvanising can be arranged for applications exposed to slurry or coastal salt environments.<\/p>\n<\/div>\n<\/div>\n

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Dane techniczne<\/h2>\n

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\"Plain<\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Szereg<\/th>\nA (mm)<\/th>\nB (mm)<\/th>\nC (mm)<\/th>\nD (mm)<\/th>\nE (mm)<\/th>\nF (mm)<\/th>\nG (mm)<\/th>\nH (mm)<\/th>\n<\/tr>\n<\/thead>\n
1.05C20<\/td>\n22<\/td>\n54<\/td>\n77<\/td>\n20<\/td>\n6<\/td>\n12.8<\/td>\n20<\/td>\nM6<\/td>\n<\/tr>\n
1.05C22<\/td>\n13.8<\/td>\n22<\/td>\n<\/tr>\n
1.05C25<\/td>\n8<\/td>\n15.8<\/td>\n25<\/td>\nM8<\/td>\n<\/tr>\n
1.05C30<\/td>\n18.3<\/td>\n30<\/td>\n<\/tr>\n
2.05C20<\/td>\n23.8<\/td>\n61.3<\/td>\n82<\/td>\n20<\/td>\n6<\/td>\n12.8<\/td>\n20<\/td>\nM6<\/td>\n<\/tr>\n
2.05C22<\/td>\n13.8<\/td>\n22<\/td>\n<\/tr>\n
2.05C25<\/td>\n23.8<\/td>\n61.3<\/td>\n82<\/td>\n20<\/td>\n8<\/td>\n15.8<\/td>\n25<\/td>\nM8<\/td>\n<\/tr>\n
2.05C30<\/td>\n18.3<\/td>\n30<\/td>\n<\/tr>\n
3.05C22<\/td>\n27<\/td>\n70<\/td>\n90<\/td>\n15<\/td>\n6<\/td>\n13.8<\/td>\n22<\/td>\nM6<\/td>\n<\/tr>\n
3.05C25<\/td>\n20<\/td>\n8<\/td>\n15.8<\/td>\n25<\/td>\nM8<\/td>\n<\/tr>\n
3.05C30<\/td>\n18.3<\/td>\n30<\/td>\n<\/tr>\n
3.05C35<\/td>\n20<\/td>\n10<\/td>\n20.8<\/td>\n35<\/td>\nM10<\/td>\n<\/tr>\n
4.05C22<\/td>\n27<\/td>\n74.6<\/td>\n90<\/td>\n20<\/td>\n6<\/td>\n13.8<\/td>\n22<\/td>\nM6<\/td>\n<\/tr>\n
4.05C25<\/td>\n8<\/td>\n15.8<\/td>\n25<\/td>\nM8<\/td>\n<\/tr>\n
4.05C30<\/td>\n18.3<\/td>\n30<\/td>\n<\/tr>\n
4.05C35<\/td>\n10<\/td>\n20.8<\/td>\n35<\/td>\nM10<\/td>\n<\/tr>\n
5.05C30<\/td>\n30.2<\/td>\n80<\/td>\n98<\/td>\n20<\/td>\n8<\/td>\n18.3<\/td>\n30<\/td>\nM8<\/td>\n<\/tr>\n
5.05C35<\/td>\n10<\/td>\n20.8<\/td>\n35<\/td>\nM10<\/td>\n<\/tr>\n
5.05C40<\/td>\n12<\/td>\n23.3<\/td>\n40<\/td>\nM12<\/td>\n<\/tr>\n
6.05C30<\/td>\n30.2<\/td>\n92<\/td>\n104<\/td>\n20<\/td>\n8<\/td>\n18.3<\/td>\n30<\/td>\nM8<\/td>\n<\/tr>\n
6.05C35<\/td>\n10<\/td>\n20.8<\/td>\n35<\/td>\nM10<\/td>\n<\/tr>\n
6.05C40<\/td>\n12<\/td>\n23.3<\/td>\n40<\/td>\nM12<\/td>\n<\/tr>\n
6.05C42<\/td>\n24.3<\/td>\n42<\/td>\n<\/tr>\n
7.05C35<\/td>\n30.2<\/td>\n106.5<\/td>\n117<\/td>\n25<\/td>\n10<\/td>\n20.8<\/td>\n35<\/td>\n10<\/td>\n<\/tr>\n
7.05C40<\/td>\n12<\/td>\n23.3<\/td>\n40<\/td>\n12<\/td>\n<\/tr>\n
7.05C42<\/td>\n24.3<\/td>\n42<\/td>\n<\/tr>\n
7.05C45<\/td>\n14<\/td>\n26.3<\/td>\n45<\/td>\n14<\/td>\n<\/tr>\n
8.05C35<\/td>\n35<\/td>\n106.5<\/td>\n121<\/td>\n25<\/td>\n10<\/td>\n20.8<\/td>\n35<\/td>\nM10<\/td>\n<\/tr>\n
8.05C40<\/td>\n12<\/td>\n23.3<\/td>\n40<\/td>\nM12<\/td>\n<\/tr>\n
8.05C42<\/td>\n24.3<\/td>\n42<\/td>\n<\/tr>\n
8.05C45<\/td>\n14<\/td>\n26.3<\/td>\n45<\/td>\nM14<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

All dimensions in millimetres. Custom bore diameters and keyway profiles available on request. Contact our technical team for non-standard specifications.<\/p>\n<\/div>\n

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Where These Yokes Work Hardest<\/h2>\n
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\ud83c\udf3e<\/div>\n
UK Arable Farming<\/div>\n
Fitted to tractor PTO drive shafts powering seed drills, mowers, tedders, and round balers across East Anglian and Yorkshire arable operations. The C-keyway design handles the sharp torque spikes common during crop engagement.<\/div>\n<\/div>\n
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\ud83c\udfd7\ufe0f<\/div>\n
Construction & Groundworks<\/div>\n
Used in mini-excavator PTO attachments, compactor plates, and concrete mixer drives throughout British construction sites. The threaded hole retention keeps the yoke secure even under continuous vibration on hard substrates.<\/div>\n<\/div>\n
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\ud83d\udce6<\/div>\n
Materials Handling<\/div>\n
Deployed in conveyor drive shafts and roller feed systems within UK warehousing, food processing, and packaging facilities where continuous duty cycles demand maximum bore engagement and minimal maintenance access.<\/div>\n<\/div>\n
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\u26a1<\/div>\n
Generowanie energii<\/div>\n
Installed in tractor-driven generator sets and hydraulic pump drives used on remote UK estates, rural utility projects, and film location power supplies where reliable shaft coupling is non-negotiable.<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Complete PTO Drive Shaft Series<\/h2>\n

The Plain Bore Yoke C-Keyway and Threaded Hole is part of a broader family of precision PTO drive shaft components. Depending on your torque rating, operating angle, and attachment interface, one of the following series may be the right match for your application:<\/p>\n

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PTO Drive Shaft G Series<\/div>\n
A general-purpose series suited to standard agricultural tractor PTO outputs at 540 RPM and 1000 RPM. Wide torque coverage makes the G Series the most commonly specified drive shaft in UK farm machinery servicing.<\/div>\n
View Product \u2192<\/a><\/div>\n<\/div>\n

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PTO Drive Shaft S Series<\/div>\n
Designed for mid-range horsepower implements requiring compact overall length without sacrificing torque capacity. Popular with UK compact tractor users in horticulture, vineyards, and orchard management.<\/div>\n
View Product \u2192<\/a><\/div>\n<\/div>\n

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PTO Drive Shaft L Series<\/div>\n
A heavy-duty series engineered for high-torque implements including large round balers, power harrows, and slurry pump drives. The L Series handles sustained high-load cycles that would fatigue lighter yoke assemblies.<\/div>\n
View Product \u2192<\/a><\/div>\n<\/div>\n

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PTO Drive Shaft T Series<\/div>\n
A telescoping series offering extended length adjustment for applications where implement-to-tractor distance varies, including front-mount PTO equipment and self-propelled machine adapters commonly used on UK upland farms.<\/div>\n
View Product \u2192<\/a><\/div>\n<\/div>\n

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Our Manufacturing Capability & Custom Service<\/h2>\n

Ever-Power operates a vertically integrated manufacturing facility with in-house forging, heat treatment, CNC machining, and quality inspection capabilities. Our engineering team can accommodate non-standard bore diameters, alternative keyway profiles (B-type, parallel, involute spline), special grub screw thread specifications, and custom surface treatments \u2014 all achievable within standard lead times for orders placed from the UK and wider Europe.<\/p>\n

For OEM customers requiring private-label components or machinery manufacturers wanting to streamline their supply chain, we offer dedicated part number assignment, custom packaging, and scheduled batch deliveries. Our production line routinely processes export documentation for UK importers, including CE declarations of conformity and material test certificates traceable to each production batch.<\/p>\n

\"Ever-Power<\/p>\n

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Get a Quote<\/a><\/p>\n<\/div>\n

<\/div>\n<\/div>\n
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\ud83d\udd27<\/div>\n
Custom Bore Sizes<\/div>\n<\/div>\n
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\ud83d\udcd0<\/div>\n
Non-Standard Keyways<\/div>\n<\/div>\n
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\ud83e\uddea<\/div>\n
Material Certificates<\/div>\n<\/div>\n
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\ud83c\udff7\ufe0f<\/div>\n
OEM Private Label<\/div>\n<\/div>\n
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Batch Scheduling<\/div>\n<\/div>\n
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\ud83d\udea2<\/div>\n
UK Export Docs<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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How UK and European Customers Use These Yokes<\/h2>\n

The following case represents a typical deployment scenario drawn from our technical support and sales records.<\/p>\n

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Case Study \u2014 UK Agricultural Machinery<\/div>\n

Lincolnshire Arable Contractor Eliminates Mid-Season Shaft Failures<\/h3>\n

A family-run agricultural contracting business based in Lincolnshire was experiencing repeated yoke bore failures on their fleet of six square balers operating across a combined area of approximately 2,400 hectares per season. The original equipment yokes were sourced from a European aftermarket supplier, but inconsistent bore tolerances meant field staff were spending up to 40 minutes per machine per week re-tightening loose grub screws \u2014 a significant drain on harvest throughput during peak August conditions.<\/p>\n

After contacting Ever-Power with the OEM part references, our applications team specified a 4.05C30 yoke for the primary tractor-to-gearbox connection and a 5.05C35 for the baler’s secondary feed shaft. The C-keyway geometry and M8 grub screw arrangement provided the dual retention the original design lacked. The contractor reported zero bore failures across the following two harvest seasons, and the technical team noted a measurable reduction in vibration noise within the baler chassis \u2014 an indirect indicator of improved shaft alignment.<\/p>\n

\"Ever-Power<\/p>\n

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0<\/div>\n
Bore failures in 2 seasons<\/div>\n<\/div>\n
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6<\/div>\n
Machines retrofitted<\/div>\n<\/div>\n
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2,400 ha<\/div>\n
Annual working area<\/div>\n<\/div>\n
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40 min<\/div>\n
Weekly downtime eliminated<\/div>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

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\u2605\u2605\u2605\u2605\u2605<\/div>\n

“We’ve been sourcing plain bore yokes from Ever-Power for three seasons now. The machining quality is noticeably better than what we were getting from our previous supplier, and the lead time from order to delivery into our Yorkshire depot has never exceeded twelve working days.”<\/p>\n

James T.<\/div>\n
Agricultural Machinery Parts Distributor \u2014 Yorkshire, England<\/div>\n<\/div>\n
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\u2605\u2605\u2605\u2605\u2605<\/div>\n

“As a groundworks contractor based in the Midlands, our mixer drives take a real hammering. The 6.05C40 yokes from Ever-Power have held up perfectly for two full construction seasons on our compactor and mixer attachments. Absolutely no movement in the bore.”<\/p>\n

Kevin R.<\/div>\n
Groundworks & Civil Engineering Contractor \u2014 West Midlands, England<\/div>\n<\/div>\n
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\u2605\u2605\u2605\u2605\u2605<\/div>\n

“We maintain PTO drive shafts for a dairy operation in County Down and switched to Ever-Power yokes after a competitor’s parts caused a misalignment issue with our milking parlour conveyor. The dimensions matched the OEM drawing exactly. Great documentation support too.”<\/p>\n

Fionnuala M.<\/div>\n
Agricultural Engineering Services \u2014 County Down, Northern Ireland<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Cz\u0119sto zadawane pytania<\/h2>\n
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\nWhat is the difference between a plain bore yoke with a C-keyway and one with a standard full keyway, and which is better for UK agricultural PTO shafts?<\/summary>\n
A C-keyway retains the arc at the bottom of the bore, preserving more cross-sectional material and improving fatigue resistance compared to a full keyway slot. For UK agricultural PTO applications \u2014 where torque reversals on balers and mowers are frequent \u2014 the C-keyway combined with a threaded grub screw hole provides superior shaft retention without needing to increase the bore diameter. The grub screw bears against the key and prevents axial migration, which is a well-documented failure mode on older equipment.<\/div>\n<\/details>\n
\nHow do I find the correct plain bore yoke series for my tractor PTO drive shaft in the UK, and what dimensions should I measure?<\/summary>\n
Measure the shaft outer diameter (the G dimension in the table above), the keyway width (E), and confirm the yoke body outer diameter (A) will clear your cross-kit housing. Match these three dimensions to the series code table on this page. If your measurements fall between listed sizes, contact our technical team at sales@pto-drive-shafts.com with your OEM part number \u2014 we can usually cross-reference most major UK and European brands within one business day.<\/div>\n<\/details>\n
\nWhat is the typical price range or cost of ordering plain bore yokes with C-keyway and threaded holes from a supplier in the UK?<\/summary>\n
Pricing depends on series, bore diameter, surface treatment, and order volume. Small series yokes (1.05C to 3.05C) typically fall in a lower price band, while larger 7 and 8 series components with custom surface treatment command a premium. For an accurate quote that accounts for your UK delivery requirements and any custom specifications, please email sales@pto-drive-shafts.com with your part series, quantity, and preferred delivery schedule.<\/div>\n<\/details>\n
\nCan I get a custom bore diameter or non-standard keyway profile for plain bore yokes supplied to my machinery manufacturing company in England?<\/summary>\n
Absolutely. Ever-Power’s in-house CNC machining capability supports non-standard bore diameters, B-type keyways, parallel keyways, involute spline bores, and alternative grub screw thread specifications. We can also supply components with full material batch traceability, CE documentation, and custom part marking \u2014 all of which are commonly required by UK OEM manufacturers supplying CE-marked machinery into the European and British markets.<\/div>\n<\/details>\n
\nWhere can I find a reliable PTO drive shaft yoke supplier that ships to the United Kingdom with short lead times and proper technical documentation?<\/summary>\n
Ever-Power at pto-drive-shafts.com ships plain bore yokes and complete PTO drive shaft assemblies directly to UK distributors, agricultural contractors, and machinery manufacturers. Our standard production and transit time to UK ports is 10\u201315 working days for in-range series, with material certificates, dimensional inspection reports, and full export documentation included as standard on qualified orders.<\/div>\n<\/details>\n
\nWhich plain bore yoke series is best for heavy-duty round baler and large square baler applications on UK farms?<\/summary>\n
Series 5 through 8, covering bore sizes from 30 mm to 45 mm, are most widely specified for large round balers and high-capacity square balers. The 5.05C35 and 6.05C40 variants are particularly popular for primary tractor-to-baler shaft connections in high-horsepower UK arable settings. If you are operating a large square baler above 100 hp input, a Series 7 or 8 yoke is typically the appropriate choice.<\/div>\n<\/details>\n
\nHow should I install a plain bore yoke with C-keyway and threaded hole onto a tractor PTO output shaft to ensure correct engagement and prevent slippage?<\/summary>\n
Begin by cleaning both the shaft and bore of any debris or corrosion. Slide the yoke onto the shaft, ensuring the key is fully seated in both the shaft keyway and the yoke’s C-keyway before advancing. Insert the grub screw into the threaded radial hole and tighten to the manufacturer’s recommended torque \u2014 typically 8\u201320 Nm depending on screw size. Avoid over-torquing as this can distort the bore geometry. For high-speed or high-vibration applications, apply thread-locking compound to the grub screw thread and verify alignment with a dial test indicator before initial operation.<\/div>\n<\/details>\n<\/div>\n<\/div>\n

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Ready to Source Plain Bore Yokes for Your UK Operation?<\/div>\n

Tell us your series, bore diameter, quantity, and delivery address. Our technical sales team responds to UK enquiries within one business day.<\/p>\n

Get a Quote \u2014 sales@pto-drive-shafts.com<\/a><\/p>\n

edytuj przez gzl<\/p>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

Plain Bore Yoke \u2013 C-Keyway & Threaded Hole | Alloy Steel | 8 Series, Bore 20\u201345 mm | PTO Drive Shaft Component for Agriculture & Industry. CE Docs Available. Request a Quote.<\/p>","protected":false},"featured_media":3358,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[1799],"product_tag":[],"class_list":["post-3353","product","type-product","status-publish","has-post-thumbnail","product_cat-yoke","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.pto-drive-shafts.com\/pl\/wp-json\/wp\/v2\/product\/3353","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pto-drive-shafts.com\/pl\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.pto-drive-shafts.com\/pl\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pto-drive-shafts.com\/pl\/wp-json\/wp\/v2\/comments?post=3353"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pto-drive-shafts.com\/pl\/wp-json\/wp\/v2\/media\/3358"}],"wp:attachment":[{"href":"https:\/\/www.pto-drive-shafts.com\/pl\/wp-json\/wp\/v2\/media?parent=3353"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.pto-drive-shafts.com\/pl\/wp-json\/wp\/v2\/product_brand?post=3353"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.pto-drive-shafts.com\/pl\/wp-json\/wp\/v2\/product_cat?post=3353"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.pto-drive-shafts.com\/pl\/wp-json\/wp\/v2\/product_tag?post=3353"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}