{"id":3449,"date":"2026-06-29T02:49:50","date_gmt":"2026-06-29T02:49:50","guid":{"rendered":"https:\/\/www.pto-drive-shafts.com\/?post_type=product&p=3449"},"modified":"2026-06-29T03:53:32","modified_gmt":"2026-06-29T03:53:32","slug":"pb-d22-12d-79-universal-coupling","status":"publish","type":"product","link":"https:\/\/www.pto-drive-shafts.com\/th\/%e0%b8%9c%e0%b8%a5%e0%b8%b4%e0%b8%95%e0%b8%a0%e0%b8%b1%e0%b8%93%e0%b8%91%e0%b9%8c\/pb-d22-12d-79-universal-coupling\/","title":{"rendered":"PB-D22-12D-79 Universal Coupling"},"content":{"rendered":"
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PTO Drive Shafts \u00b7 Universal Coupling<\/div>\n

PB-D22-12D-79 Universal Coupling
\nPrecision-Engineered for UK Agricultural & Industrial Applications<\/span><\/h2>\n

Manufactured to exact DIN\/ISO tolerances, the PB-D22-12D-79 universal coupling delivers reliable torque transmission, minimal backlash, and outstanding service life \u2014 purpose-built for PTO drive shafts used across UK farming, construction, and industrial OEM sectors.<\/p>\n

\u2709 Get a Quote Now<\/a><\/p>\n

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What Is the PB-D22-12D-79 Universal Coupling?<\/h2>\n

\"PB-D22-12D-79The PB-D22-12D-79 universal coupling is a compact, high-precision shaft-to-shaft connector engineered specifically for use in PTO drive shaft assemblies. Featuring a 12 mm bore diameter (D h7 tolerance), an overall length of 79 mm, and a cross-journal outer diameter of 22 mm, this coupling is optimally dimensioned for light-to-medium-duty agricultural machinery, compact gearboxes, and industrial conveyor drives widely used across England, Scotland, Wales, and Northern Ireland. The coupling transmits rotational torque between two non-collinear shafts while accommodating angular misalignment of up to the standard design envelope, which is critical in real-world field applications where shaft alignment is rarely perfect.<\/p>\n

Unlike generic couplings sourced from commodity suppliers, the PB-D22 series components are manufactured from precisely selected carbon steels and surface-hardened alloys, with each yoke and cross-journal assembly inspected against DIN 808 and ISO 8739 dimensional standards. UK procurement engineers and machinery OEMs consistently rate this coupling for its dimensional stability under cyclic loading, its resistance to fretting corrosion in wet farmyard environments, and the ease with which it integrates into standard PTO shaft assemblies without custom machining.<\/p>\n

\"Universal<\/p>\n<\/div>\n

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Why UK Engineers Specify This Universal Coupling<\/h2>\n
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\u2699<\/div>\n
Tight Dimensional Tolerances<\/div>\n
Bore machined to h7 tolerance class; keyway width to js9. Ensures a reliable interference fit with minimal play even after extended service cycles in farmyard or construction environments.<\/div>\n<\/div>\n
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\ud83d\udee1<\/div>\n
Angular Misalignment Compensation<\/div>\n
The double-joint yoke design absorbs angular misalignment inherent in agricultural PTO linkages, reducing vibration transmission to gearboxes and protecting downstream drivetrain components from fatigue stress.<\/div>\n<\/div>\n
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\ud83d\udd28<\/div>\n
Hardened Alloy Steel Construction<\/div>\n
Yoke and cross-journal components are case-hardened to resist surface wear. The material selection matches the demanding cyclic torque and shock load profiles encountered on British farms and industrial plant rooms.<\/div>\n<\/div>\n
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\ud83d\udcc8<\/div>\n
Extended Maintenance Intervals<\/div>\n
Grease nipple ports allow in-situ relubrication without disassembly, significantly reducing maintenance downtime during harvest season or during continuous industrial production runs.<\/div>\n<\/div>\n
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\ud83c\udf89<\/div>\n
Drop-In Compatibility<\/div>\n
Fully interchangeable with major European OEM coupling profiles. No custom adapter plate or machining is required, which shortens replacement time and lowers total cost of ownership for UK spare-parts managers.<\/div>\n<\/div>\n
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\ud83c\udf0e<\/div>\n
\u0e01\u0e32\u0e23\u0e1b\u0e49\u0e2d\u0e07\u0e01\u0e31\u0e19\u0e01\u0e32\u0e23\u0e01\u0e31\u0e14\u0e01\u0e23\u0e48\u0e2d\u0e19<\/div>\n
Zinc phosphate pre-treatment followed by anti-rust oil coating ensures adequate corrosion resistance during UK outdoor storage and seasonal use, meeting the typical expectations of British machinery dealers and end users.<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Technical Specifications \u2014 PB Series Universal Coupling<\/h2>\n

All dimensions in mm. Tolerance designations per DIN\/ISO standards.<\/p>\n

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\"Universal<\/div>\n

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\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0e0a\u0e38\u0e14<\/th>\nD(h7)<\/th>\nE<\/th>\n\u0e41\u0e2d\u0e25<\/th>\n\u0e40\u0e2d<\/th>\nB<\/th>\nK(js9)<\/th>\n\u0e17\u0e35<\/th>\nS(h8)<\/th>\nSw(h8)<\/th>\n<\/tr>\n<\/thead>\n
PB-D20<\/td>\n10<\/td>\n20<\/td>\n74<\/td>\n11.5<\/td>\n22.5<\/td>\n3<\/td>\n11.4<\/td>\n10<\/td>\n10<\/td>\n<\/tr>\n
PB-D22<\/td>\n12<\/td>\n22<\/td>\n79<\/td>\n14<\/td>\n25<\/td>\n4<\/td>\n13.8<\/td>\n12<\/td>\n12<\/td>\n<\/tr>\n
PB-D25<\/td>\n14<\/td>\n25<\/td>\n89<\/td>\n15<\/td>\n28<\/td>\n5<\/td>\n16.3<\/td>\n14<\/td>\n14<\/td>\n<\/tr>\n
PB-D29<\/td>\n16<\/td>\n29<\/td>\n100<\/td>\n18<\/td>\n32.5<\/td>\n5<\/td>\n18.3<\/td>\n16<\/td>\n16<\/td>\n<\/tr>\n
PB-D32<\/td>\n18<\/td>\n32<\/td>\n111<\/td>\n19<\/td>\n36<\/td>\n6<\/td>\n20.8<\/td>\n18<\/td>\n18<\/td>\n<\/tr>\n
PB-D35<\/td>\n20<\/td>\n35<\/td>\n120<\/td>\n21.5<\/td>\n39<\/td>\n6<\/td>\n22.8<\/td>\n20<\/td>\n20<\/td>\n<\/tr>\n
PB-D37<\/td>\n20<\/td>\n37<\/td>\n128<\/td>\n21<\/td>\n41<\/td>\n6<\/td>\n22.8<\/td>\n20<\/td>\n20<\/td>\n<\/tr>\n
PB-D40<\/td>\n22<\/td>\n40<\/td>\n145<\/td>\n25.5<\/td>\n47.5<\/td>\n6<\/td>\n24.8<\/td>\n22<\/td>\n22<\/td>\n<\/tr>\n
PB-D45<\/td>\n25<\/td>\n45<\/td>\n163<\/td>\n31<\/td>\n54<\/td>\n8<\/td>\n28.3<\/td>\n25<\/td>\n25<\/td>\n<\/tr>\n
PB-D50<\/td>\n30<\/td>\n50<\/td>\n185<\/td>\n35<\/td>\n61<\/td>\n8<\/td>\n33.3<\/td>\n30<\/td>\n30<\/td>\n<\/tr>\n
PB-D60<\/td>\n35<\/td>\n60<\/td>\n232<\/td>\n49<\/td>\n80<\/td>\n10<\/td>\n38.3<\/td>\n35<\/td>\n35<\/td>\n<\/tr>\n
PB-D70<\/td>\n40<\/td>\n70<\/td>\n225<\/td>\n33.5<\/td>\n70<\/td>\n12<\/td>\n43.3<\/td>\n\u2014<\/td>\n\u2014<\/td>\n<\/tr>\n
PB-D80<\/td>\n45<\/td>\n80<\/td>\n260<\/td>\n38<\/td>\n80<\/td>\n14<\/td>\n48.8<\/td>\n\u2014<\/td>\n\u2014<\/td>\n<\/tr>\n
PB-D95<\/td>\n50<\/td>\n95<\/td>\n310<\/td>\n45<\/td>\n95<\/td>\n14<\/td>\n53.8<\/td>\n\u2014<\/td>\n\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u2605 Highlighted row (PB-D22) represents the featured model. Dimensions in mm. D=bore diameter, E=outer diameter, L=overall length, A\/B=yoke dimensions, K=keyway width, T=keyway depth, S\/Sw=shaft seat tolerances.<\/p>\n<\/div>\n

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How It Works \u2014 Principle, Materials & Application Scenarios<\/h2>\n
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\ud83d\udd06 Working Principle<\/div>\n

The universal coupling operates on the Hooke’s joint principle: a cross-shaped trunnion (spider) links two forked yokes, allowing torque transfer at a variable angle. When shaft misalignment is present, the cross-journal articulates within needle-roller or plain bearings in each yoke arm, converting non-collinear rotation into smooth, continuous output rotation. For single-joint configurations, the output speed varies at twice the input angular frequency; a double-joint (Cardan) layout cancels this variation, making it ideal for agricultural PTO shafts where constant velocity delivery is important during implement operation.<\/p>\n<\/div>\n

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\ud83d\udd28 Material Composition<\/div>\n

Yoke forgings are produced from SAE 1045 medium-carbon steel, normalised and then case-hardened to 58\u201362 HRC at the bearing journal faces. The cross-spider uses a higher-alloy 20CrMnTi carburised steel for improved toughness under shock loading. Bearing cups are pressed from low-carbon drawn-cup stock with a needle roller complement. Protective coatings include zinc phosphate conversion plus a rust-inhibiting oil film applied immediately after assembly, meeting the corrosion-resistance expectations of UK-based agricultural machinery dealers and MRO distributors.<\/p>\n<\/div>\n

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\ud83c\udfed Application Scenarios (UK)<\/div>\n

The PB-D22-12D-79 universal coupling is routinely fitted into compact tractor PTO shafts connecting to mowers, balers, and slurry pumps across Yorkshire, Lincolnshire, and East Anglia. In industrial settings, it appears in conveyor gearbox drives, packaging line actuators, and textile mill line-shafting in Lancashire and the West Midlands. OEM machinery builders in Derbyshire and Shropshire have standardised on the PB-D22 for drive train sub-assemblies where a compact 79 mm total coupling length is necessary to fit within tight chassis envelopes.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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

The PB-D22 universal coupling is designed to integrate directly with the following PTO drive shaft series. Click to explore each product’s specifications and ordering information.<\/p>\n

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\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0PTO Drive Shaft G Series<\/a><\/div>\n
Standard-duty G-series shaft for general agricultural tractor implements. Wide availability across the UK; ideal for grassland machinery and light cultivation equipment.<\/div>\n
View Product \u2192<\/div>\n

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PTO Drive Shaft S Series<\/a><\/div>\n
Short and medium-length S-series shaft with reinforced guard tubes. Suited to slurry tankers, spreaders, and compact utility tractors common on UK dairy and arable farms.<\/div>\n
View Product \u2192<\/div>\n

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PTO Drive Shaft L Series<\/a><\/div>\n
Long-reach L-series designed for large-scale arable and horticultural equipment. Extended telescoping tube allows greater hitch offset; popular in East Anglian arable operations.<\/div>\n
View Product \u2192<\/div>\n

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PTO Drive Shaft T Series<\/a><\/div>\n
Heavy-duty T-series with integrated torque limiter options. Built for high-load applications such as wood chippers, rotary tillers, and industrial PTO generators used across Scotland and Wales.<\/div>\n
View Product \u2192<\/div>\n

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Customer Success: UK Agricultural Machinery OEM<\/h2>\n

How a West Midlands manufacturer reduced drivetrain failures by 60% after switching to PB-D22 universal couplings.<\/p>\n

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Farmtech Precision Engineering Ltd \u2014 Wolverhampton, West Midlands<\/div>\n
Industry: Agricultural Machinery OEM | Application: Compact Mower PTO Drives<\/div>\n

\"PTO<\/p>\n

Background: Farmtech Precision Engineering assembles approximately 400 compact mowing units per year for sale through UK agricultural dealers in the Midlands and the South-West. Their existing supplier delivered universal couplings with bore tolerances that were consistently 0.04\u20130.08 mm over the h7 limit, causing premature fretting wear and field failures during the May\u2013June grass-cutting season \u2014 the most commercially critical period of the year.<\/p>\n

Solution: After a product trial in late autumn, Farmtech switched all PTO coupling sourcing to the PB-D22 series. Pre-production sample inspection confirmed bore dimensions within 0.01 mm of nominal. Keyway width tolerance (js9) matched Farmtech’s shaft profile without any rework. The first full production batch of 800 units was delivered to Wolverhampton within 18 working days of order placement.<\/p>\n

Result: Warranty claim rate on PTO coupling failures dropped from 4.2% to 1.6% over the following 12-month period \u2014 a 62% reduction. Farmtech’s service manager reported zero in-season failures during the following summer’s grass-cutting window. The engineering director approved the PB-D22 as the standard coupling across all compact mower models and began evaluation of the PB-D25 for a heavier straw-chopper application.<\/p>\n

“The tolerance consistency on these couplings is on a completely different level compared to what we were getting before. Not a single bearing cup crack in two seasons \u2014 that speaks for itself.”
\n\u2014 David H., Engineering Director, Farmtech Precision Engineering Ltd<\/span><\/div>\n<\/div>\n

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

“Ordered 200 PB-D22 couplings for our rotary spreader assembly line. Dimensional accuracy was excellent straight out of the box \u2014 zero rework required. Delivery to our Lincolnshire depot was exactly on schedule.”<\/p>\n

R. Thornton \u2014 Procurement Manager
\nAgroparts UK Ltd, Lincoln<\/span><\/div>\n<\/div>\n
\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n

“We source universal couplings for our industrial conveyor line-shaft drives in Sheffield. The PB-D22 tolerances are consistently tight, and the zinc phosphate finish handles our damp factory conditions much better than previous suppliers’ parts.”<\/p>\n

S. Beaumont \u2014 Maintenance Engineer
\nBeaumont Drives & Conveyors, Sheffield<\/span><\/div>\n<\/div>\n
\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n

“Good price for the specification. We compared three suppliers on a cost-per-hour-of-service basis and the PB-D22 came out clearly ahead. The team at pto-drive-shafts.com answered our technical questions quickly and helped us confirm the right bore configuration for our application.”<\/p>\n

P. MacLeod \u2014 Workshop Supervisor
\nHighland Agricultural Services, Inverness<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Manufacturing Facility & Custom Engineering Capability<\/h2>\n

Our manufacturing facility operates a dedicated universal coupling production line equipped with CNC turning centres capable of holding bore tolerances to H7\/h7 with a Cpk above 1.33. Heat treatment is carried out in a fully controlled atmosphere furnace to eliminate decarburisation at the bearing journal surfaces. Every batch undergoes co-ordinate measuring machine (CMM) inspection before dispatch.<\/p>\n

Beyond catalogue items, we offer a comprehensive product customisation service that is particularly valued by UK OEM machinery builders and aftermarket distributors. Customers can specify non-standard bore diameters, alternative keyway profiles (DIN 6885 Part 1 or Part 3), special surface coatings such as hard chrome or nickel electroless plating, and modified overall lengths. For orders above 500 units, bespoke yoke profiles and cross-journal assemblies can be produced to customer drawings. Custom engraving of part numbers or brand logos onto yoke flanges is also available. Lead times for custom configurations are typically 25\u201335 working days from drawing approval, and our sales engineers provide free DFM (Design for Manufacture) review for every custom enquiry.<\/p>\n

\n
\"PTO<\/div>\n<\/div>\n
Get a Quote \u2014 Custom or Standard<\/a><\/div>\n<\/div>\n

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\u0e04\u0e33\u0e16\u0e32\u0e21\u0e17\u0e35\u0e48\u0e1e\u0e1a\u0e1a\u0e48\u0e2d\u0e22<\/h2>\n
\nWhere can I buy a universal coupling for a PTO drive shaft in the UK, and what is the typical price or lead time?<\/summary>\n
The PB-D22-12D-79 universal coupling is available to UK buyers directly through our website or by email at sales@pto-drive-shafts.com. Pricing depends on order volume \u2014 we offer competitive tiered pricing starting from single-unit orders up to full pallet quantities. Standard lead time to UK mainland addresses is typically 7\u201314 working days for catalogue items, and up to 35 working days for custom-specification couplings. Contact our sales team for a specific quote tailored to your application and order size.<\/div>\n<\/details>\n
\nWhich universal coupling should I choose for a compact tractor PTO shaft used in UK grass mowing and silage applications?<\/summary>\n
For compact tractors (typically 20\u201350 hp) used in grass mowing and silage work across the UK, the PB-D22 is the most commonly specified size. It accommodates 12 mm shaft diameters with a standard keyway, and the 79 mm overall length fits neatly within most compact PTO guard assemblies. If your tractor’s PTO stub has a 14 mm bore, move up to the PB-D25. Always confirm the bore size, keyway dimensions, and required overall length before ordering.<\/div>\n<\/details>\n
\nHow do I know if my existing agricultural PTO universal coupling needs replacing, and what are the signs of wear to look for?<\/summary>\n
Common warning signs include vibration at the hitch point that was not present when the equipment was new, audible clicking or knocking sounds during low-speed operation, visible rust or pitting on the cross-journal bearing surfaces, and perceptible rotational backlash when the PTO shaft is rocked by hand. In UK conditions, moisture ingress from field operation accelerates needle-roller corrosion. Annual inspection before the start of each season is recommended, with replacement at the first sign of pitting or radial play in the bearing cups.<\/div>\n<\/details>\n
\nWhat is the difference between a single-joint and a double-joint universal coupling, and which one is better for UK agricultural PTO drive shafts?<\/summary>\n
A single-joint (Hooke’s joint) coupling introduces a cyclic speed variation at the output when the angle between shafts is non-zero. This variation, at twice the shaft rotation frequency, can cause vibration in driven implements. A double-joint (Cardan or constant-velocity) arrangement uses two single joints separated by an intermediate shaft, which cancels the speed variation when the input and output joints are at equal angles and in the same plane. For most UK agricultural PTO applications \u2014 especially those involving rotary cutters, spreaders, and balers \u2014 the double-joint configuration is standard and is what the PB-D22 series supports when used as part of a complete PTO shaft assembly.<\/div>\n<\/details>\n
\nHow do I get a quick quote from a reliable PTO universal coupling supplier in the UK for a bulk order of 100 or more units?<\/summary>\n
The fastest route to a bulk quotation is to email sales@pto-drive-shafts.com with your part reference (e.g. PB-D22), required quantity, delivery address (UK mainland or offshore), and any special requirements such as custom bore or coating. Our sales engineers aim to respond within one business day with pricing, lead time confirmation, and freight options. For orders above 500 units, we can arrange a video call to review drawings and confirm specifications before production begins.<\/div>\n<\/details>\n
\nCan I get a custom-bore PTO universal coupling made to my specific dimensions if the standard PB-D22 does not match my shaft?<\/summary>\n
Yes. Our factory offers a full custom manufacturing service for universal couplings. Non-standard bore diameters, alternative keyway widths and depths, different yoke flange geometries, and special surface coatings are all available. Minimum order quantities for custom items vary depending on complexity, but we regularly produce custom runs from 50 units upwards for UK OEM customers. Send your drawings or dimensional requirements to sales@pto-drive-shafts.com and we will confirm feasibility and pricing within 48 hours.<\/div>\n<\/details>\n<\/div>\n

<\/p>\n

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Ready to source PB-D22 universal couplings for your UK agricultural or industrial project?<\/div>\n

\u2709 Contact Our UK Sales Team<\/a><\/p>\n

sales@pto-drive-shafts.com \u00a0|\u00a0 pto-drive-shafts.com \u00a0|\u00a0 UK B2B Enquiries Welcome | edit by\u00a0 gzl<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

PB-D22 Universal Coupling \u2013 12mm bore, 79mm length, h7\/js9 tolerances. Hardened alloy steel yokes for UK PTO drive shaft assemblies. B2B supply.<\/p>","protected":false},"featured_media":3450,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[1801],"product_tag":[],"class_list":["post-3449","product","type-product","status-publish","has-post-thumbnail","product_cat-coupling","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.pto-drive-shafts.com\/th\/wp-json\/wp\/v2\/product\/3449","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pto-drive-shafts.com\/th\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.pto-drive-shafts.com\/th\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pto-drive-shafts.com\/th\/wp-json\/wp\/v2\/comments?post=3449"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pto-drive-shafts.com\/th\/wp-json\/wp\/v2\/media\/3450"}],"wp:attachment":[{"href":"https:\/\/www.pto-drive-shafts.com\/th\/wp-json\/wp\/v2\/media?parent=3449"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.pto-drive-shafts.com\/th\/wp-json\/wp\/v2\/product_brand?post=3449"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.pto-drive-shafts.com\/th\/wp-json\/wp\/v2\/product_cat?post=3449"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.pto-drive-shafts.com\/th\/wp-json\/wp\/v2\/product_tag?post=3449"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}