{"id":621,"date":"2026-04-24T06:16:44","date_gmt":"2026-04-24T06:16:44","guid":{"rendered":"https:\/\/qd-bushings.top\/?post_type=product&p=621"},"modified":"2026-04-24T07:11:11","modified_gmt":"2026-04-24T07:11:11","slug":"j-qd-type-bushings","status":"publish","type":"product","link":"https:\/\/qd-bushings.top\/tr\/product\/j-qd-type-bushings\/","title":{"rendered":"J QD Type Bushings"},"content":{"rendered":"
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INDUSTRIAL POWER TRANSMISSION \u00a0\u00b7\u00a0 QD-BUSHINGS.TOP \u00a0\u00b7\u00a0 SUPPLIED ACROSS THE UK<\/p>\n

J QD Type Bushings<\/h2>\n

Precision Split-Taper Locking Hub \u00a0|\u00a0 Bore Range: 1-7\/16″ to 4″ & 40\u201395mm \u00a0|\u00a0 1,620 in.\/lbs. Torque<\/p>\n

Solid steel construction \u00a0\u00b7\u00a0 OEM & MRO supply to UK sprocket, pulley & conveyor sectors<\/p>\n<\/div>\n

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J QD Type Bushing \u2014 Specification Overview<\/h2>\n

\"QDThe J QD Type Bushing is manufactured from solid steel bar stock machined to tight dimensional tolerances, delivering a hub-to-shaft locking solution that outperforms cast iron alternatives in both tensile strength and long-term fatigue resistance. The split-taper geometry creates a 360-degree interference fit across a bore range spanning 1-7\/16 inches through 4 inches imperial and 40mm through 95mm metric \u2014 covering the majority of shaft sizes found in British manufacturing plant built across both legacy imperial and modern metric eras. Standard applications include V-belt sheave drives, roller chain sprocket mountings, synchronous timing pulleys, and bucket elevator drum hubs across UK quarrying, food production, packaging, and utilities sectors.<\/p>\n

What separates J bushings from commodity alternatives is a documented quality control programme applied at every stage of production \u2014 dimensional inspection, bore concentricity verification, and taper angle conformance checks are carried out before any component leaves the factory. UK buyers sourcing for OEM build schedules or high-rotation MRO programmes will find consistent batch-to-batch dimensional accuracy that eliminates the re-work often encountered with lower-grade imports. The J bushing carries a bolt circle of 6.250 inches and a wrench torque rating of 1,620 in.\/lbs., applied via a 5\/8 \u2013 11 UNC cap screw, and weighs 18 lbs. per unit \u2014 relevant data for drive designer load calculations and shipping logistics planning.<\/p>\n

Stocked and supplied by qd-bushings.top for UK trade delivery, the J bushing is available in standard bore sizes with keyway as well as custom configurations including non-standard bores, double keyways, and metric keyway slots to DIN 6885. Pricing and availability confirmed on request \u2014 contact our UK trade desk for same-day response.<\/p>\n<\/div>\n<\/div>\n

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J QD Bushing \u2014 dimensional reference diagram (A, B, D, E, F, G, L)<\/p>\n<\/div>\n

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\u2709\u00a0 Request a Quote \u2014 sales@qd-bushings.top<\/a><\/div>\n

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J QD Bushing \u2014 Full Dimensional Specification<\/h2>\n

All imperial dimensions in inches. Metric bore options: 40\u201395mm. Torque values in in.\/lbs.<\/p>\n

\"QD<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PARAMETER<\/th>\nDIMENSION \/ VALUE<\/th>\nNOTES<\/th>\n<\/tr>\n<\/thead>\n
Bushing Type<\/td>\nJ<\/td>\nSplit-taper QD pattern<\/td>\n<\/tr>\n
Dimension A<\/td>\n1.000″<\/td>\nHub projection<\/td>\n<\/tr>\n
Dimension B<\/td>\n5.148″<\/td>\nTaper OD at large end<\/td>\n<\/tr>\n
Dimension D<\/td>\n7.250″<\/td>\nFlange OD<\/td>\n<\/tr>\n
Dimension E<\/td>\n3.500″<\/td>\nOverall bushing length<\/td>\n<\/tr>\n
Dimension F<\/td>\n3.188″<\/td>\nFlange recess depth<\/td>\n<\/tr>\n
Dimension G<\/td>\n0.188″<\/td>\nFlange thickness<\/td>\n<\/tr>\n
Dimension L<\/td>\n4.500″<\/td>\nTaper bore length<\/td>\n<\/tr>\n
Bolt Circle<\/td>\n6.250″<\/td>\nPull-up bolt PCD<\/td>\n<\/tr>\n
Cap Screw Size<\/td>\n5\/8 \u2013 11 UNC<\/td>\nUse calibrated torque wrench<\/td>\n<\/tr>\n
Wrench Torque \u2605<\/td>\n1,620 in.\/lbs.<\/td>\nAlternate tightening sequence<\/td>\n<\/tr>\n
Unit Weight<\/td>\n18 lbs.<\/td>\nPer bushing unit<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Complete QD Family \u2014 Bolt Torque Reference<\/h3>\n
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QD SIZE<\/th>\nCAP SCREW<\/th>\nTORQUE (in.\/lbs.)<\/th>\n<\/tr>\n<\/thead>\n
JA<\/td>\n10 \u2013 24<\/td>\n60<\/td>\n<\/tr>\n
SH, SDS, SD<\/td>\n.25 \u2013 20<\/td>\n108<\/td>\n<\/tr>\n
SK<\/td>\n.3125 \u2013 18<\/td>\n180<\/td>\n<\/tr>\n
SF<\/td>\n.375 \u2013 16<\/td>\n360<\/td>\n<\/tr>\n
E<\/td>\n.5 \u2013 13<\/td>\n720<\/td>\n<\/tr>\n
F<\/td>\n.5625 \u2013 12<\/td>\n900<\/td>\n<\/tr>\n

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J \u2605<\/td>\n.625 \u2013 11<\/td>\n1,620<\/td>\n<\/tr>\n
M<\/td>\n.75 \u2013 10<\/td>\n2,700<\/td>\n<\/tr>\n
N<\/td>\n.875 \u2013 9<\/td>\n3,600<\/td>\n<\/tr>\n
P<\/td>\n1 \u2013 8<\/td>\n5,400<\/td>\n<\/tr>\n
W<\/td>\n1.125 \u2013 7<\/td>\n7,200<\/td>\n<\/tr>\n
S<\/td>\n1.125 \u2013 7<\/td>\n9,000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

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Available Bore Sizes \u2014 J QD Bushings<\/h2>\n
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Imperial Bores (inches):<\/p>\n

1-7\/16″ \u00a0\u00b7\u00a0 1-1\/2″ \u00a0\u00b7\u00a0 1-5\/8″ \u00a0\u00b7\u00a0 1-11\/16″ \u00a0\u00b7\u00a0 1-3\/4″ \u00a0\u00b7\u00a0 1-7\/8″ \u00a0\u00b7\u00a0 1-15\/16″ \u00a0\u00b7\u00a0 2-1\/8″ \u00a0\u00b7\u00a0 2-3\/16″ \u00a0\u00b7\u00a0 2-1\/4″ \u00a0\u00b7\u00a0 2-3\/8″ \u00a0\u00b7\u00a0 2-5\/8″ \u00a0\u00b7\u00a0 2-11\/16″ \u00a0\u00b7\u00a0 2-3\/4″ \u00a0\u00b7\u00a0 3″ \u00a0\u00b7\u00a0 3-1\/8″ \u00a0\u00b7\u00a0 3-3\/16″ \u00a0\u00b7\u00a0 3-1\/4″ \u00a0\u00b7\u00a0 3-11\/16″ \u00a0\u00b7\u00a0 3-3\/4″ \u00a0\u00b7\u00a0 4″ \u00a0\u00b7\u00a0 4-3\/16″ \u00a0\u00b7\u00a0 4-1\/4″ \u00a0\u00b7\u00a0 4-3\/8″<\/p>\n

Metric Bores (mm):<\/p>\n

40mm \u00a0\u00b7\u00a0 42mm \u00a0\u00b7\u00a0 45mm \u00a0\u00b7\u00a0 48mm \u00a0\u00b7\u00a0 50mm \u00a0\u00b7\u00a0 55mm \u00a0\u00b7\u00a0 65mm \u00a0\u00b7\u00a0 70mm \u00a0\u00b7\u00a0 75mm \u00a0\u00b7\u00a0 80mm \u00a0\u00b7\u00a0 85mm \u00a0\u00b7\u00a0 90mm \u00a0\u00b7\u00a0 95mm \u00a0\u00b7\u00a0 110mm<\/p>\n<\/div>\n

Non-standard bore sizes available on request. Email specification to sales@qd-bushings.top\"QD<\/a><\/p>\n<\/div>\n

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Four Reasons UK Engineers Specify J QD Bushings<\/h2>\n

Performance characteristics verified through 15+ years of manufacturing and field deployment<\/p>\n

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STEEL CONSTRUCTION<\/p>\n

Solid Steel \u2014 Superior Strength vs Cast Iron<\/h3>\n

Unlike many catalogue alternatives that use grey cast iron, J bushings from qd-bushings.top are machined from solid steel bar. Steel offers significantly higher tensile and fatigue strength \u2014 a tangible advantage in UK applications subject to frequent start-stop cycling, reversing torque, or shock loads such as crusher drive belts and heavy conveyor heads where cast iron can develop micro-cracking over time.<\/p>\n<\/div>\n

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BORE RANGE<\/p>\n

Imperial & Metric \u2014 One Bushing, Two Standards<\/h3>\n

The J bushing covers bore diameters from 1-7\/16 inches through to 4-3\/8 inches imperial and 40mm to 110mm metric, making it one of the most versatile single-size QD bushings available. UK plant managers overseeing mixed-era facilities \u2014 where legacy imperial machinery sits alongside newer metric-shaft drives \u2014 can standardise on a single bushing type rather than maintaining separate spares inventories for each shaft standard.<\/p>\n<\/div>\n

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QUALITY PROGRAMME<\/p>\n

Documented QC \u2014 Batch-to-Batch Consistency<\/h3>\n

Every J bushing passes a multi-stage quality programme covering bore concentricity, taper angle conformance, and dimensional tolerancing before despatch. UK OEM buyers building to repeatable drive specifications report that this consistency eliminates the trial fitting and shimming that erodes build-line productivity when sourcing from lower-tier suppliers. First-article inspection reports and material traceability certificates are available on request for regulated industry procurement.<\/p>\n<\/div>\n

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APPLICATIONS<\/p>\n

Sprockets, Pulleys, and Full Powertrain Inventory<\/h3>\n

J QD bushings are a stock component for V-belt sheaves, roller chain sprockets, timing pulleys, and bucket elevator drums \u2014 the four hub types that account for the large majority of UK industrial drive mounts. qd-bushings.top supplies the full QD family alongside matching sheaves, sprockets, and keystock, enabling UK buyers to consolidate powertrain procurement with a single supplier rather than sourcing bushing and hub from separate distributors at a higher combined landed cost.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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\"QD<\/p>\n

Installation, Material Science & Application Context<\/h2>\n

The engineering fundamentals that make J QD bushings a long-service solution in demanding UK environments<\/p>\n

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Standard Mounting Procedure<\/h3>\n

Clean the bushing taper and hub bore thoroughly \u2014 no oil, grease, or anti-seize compound at the taper interface. Slide the J bushing onto the shaft flange-end first and assemble the keystock. Position the bushing taper into the hub bore, aligning the drilled pull-up bolt holes with the taper holes in the bushing flange. Insert pull-up bolts with lock washers and tighten alternately and evenly to 1,620 in.\/lbs. using a calibrated torque wrench \u2014 no extensions. A visible gap between the hub face and bushing flange must remain after final torque; closing this gap prevents adequate taper engagement and risks hub slippage under load. Do not use impact wrenches for final tightening, as shock torque application can deform the split bushing geometry and compromise clamping uniformity across the bore circumference.<\/p>\n<\/div>\n

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Dismounting Without Shaft Damage<\/h3>\n

Dismounting a J QD bushing requires no specialist tooling \u2014 the same cap screws used for assembly are backed out and threaded into the dedicated extraction holes in the bushing flange. As the screws advance they bear against the hub face, generating a controlled jacking force that separates the taper interface cleanly. This preserves shaft finish across repeated assembly cycles, a practical advantage for UK maintenance teams managing drives through multiple planned shutdown intervals without shaft replacement. Contrast this with pressed-on hubs, where removal risks scoring the shaft journal and necessitates expensive shaft refurbishment or replacement \u2014 a cost that accumulates significantly across multi-site plant portfolios. The complete remove-inspect-reinstall cycle on a J QD drive typically takes under fifteen minutes with a standard toolkit.<\/p>\n<\/div>\n

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Typical UK Drive Applications<\/h3>\n

The J bushing’s bore range positions it at the mid-to-heavy end of UK industrial drive duty. Common applications include conveyor belt head drums in Scottish aggregates and English construction materials handling; grain and seed elevator sprocket drives across East Anglian and Yorkshire agricultural operations; packaging line belt drives at food and beverage manufacturers in the Midlands and North West; pump drives at UK water treatment works operated under Ofwat-regulated frameworks; and fan drives in industrial process ventilation across pharmaceutical and chemical manufacturing sites. The full bore range from 1-7\/16 inches to 95mm ensures specifiers can match the J bushing to virtually any mid-duty shaft encountered in British plant built from the 1960s through to new equipment commissioned today.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\"QD<\/p>\n

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Trusted by UK Industry \u2014 Customer Experiences<\/h2>\n

Verified accounts from procurement and engineering professionals across British manufacturing<\/p>\n

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\u2605\u2605\u2605\u2605\u2605<\/p>\n

“We moved our grain elevator sprocket drives to J QD bushings<\/a> across all four sites in East Yorkshire. The bore range covers everything from our older 2-inch imperial shafts to the 75mm metric shafts fitted on equipment we purchased in 2019. Changeovers during harvest season maintenance are noticeably faster \u2014 the dismounting system is a genuine time saver.”<\/p>\n

Robert Wilkinson \u2014 Engineering Manager<\/p>\n

Wilkinson Grain & Storage Ltd, East Yorkshire, England<\/p>\n<\/div>\n

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\u2605\u2605\u2605\u2605\u2605<\/p>\n

“As a packaging equipment OEM based in Warwickshire, we build J QD bushings into every belt drive we manufacture. The steel construction has eliminated the hub cracking failures we experienced with cast iron alternatives. Our customers \u2014 mostly UK food and beverage lines \u2014 appreciate that MRO staff can change sheaves without calling a specialist. We’ve had zero warranty callbacks on drive mounts in three years.”<\/p>\n

Claire Ashworth \u2014 Head of Engineering<\/p>\n

Ashworth Drive Systems Ltd, Warwickshire, England<\/p>\n<\/div>\n

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\u2605\u2605\u2605\u2605\u2605<\/p>\n

“We source J bushings for water pump drives at several Scottish water treatment sites. The metric bore options \u2014 particularly the 80mm and 90mm sizes \u2014 are not always easy to find in the UK market without long lead times. qd-bushings.top had them in stock with drawings available on request, which was exactly what we needed to meet our planned maintenance window without carrying excessive inventory.”<\/p>\n

Alasdair Mackenzie \u2014 Procurement Lead<\/p>\n

Strathclyde Water Infrastructure, Glasgow, Scotland<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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Custom J QD Bushing Manufacturing \u2014 OEM & MRO<\/h2>\n

With over 15 years of manufacturing experience, the facility behind qd-bushings.top operates a dedicated CNC turning and precision boring programme for non-standard J bushing configurations. OEM and ODM service is offered as standard \u2014 customers submit shaft specifications and we return a dimensional drawing for approval before cutting commences. Common custom requests from UK buyers include: non-catalogue bore diameters within the J range, double-keyway configurations for high-torque reversing drives, metric keyway slots to DIN 6885 for European-origin machinery, and enhanced surface treatments including phosphate-and-oil, nickel plate, and hard chrome for chemically aggressive environments such as Scottish offshore pump rooms and North West England chemical processing facilities.<\/p>\n

Minimum order quantities for custom J bushings are flexible \u2014 we regularly process short-run orders of five to twenty units for UK rebuild workshops and specifying engineers alongside high-volume OEM programmes. Price matching is available: if you are currently sourcing from another supplier, contact us with your current pricing and specification and we will provide a competitive quote. All custom orders include a material conformity statement and dimensional report; full first-article inspection with CMM certification is available for regulated procurement chains including BRC-approved food manufacturing, NHS-linked pharmaceutical production, and UK defence supply.<\/p>\n

As your one-stop powertrain supplier, we hold complementary stock including sprockets, V-belt sheaves, timing pulleys, keystock, and synchronous belts \u2014 enabling UK buyers to consolidate multiple purchase lines into a single supplier relationship and simplify the approval and payment process for routine MRO procurement.\"QD<\/p>\n<\/div>\n

\u2709\u00a0 Get a Quote \u2014 sales@qd-bushings.top<\/a><\/div>\n<\/div>\n

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Questions from UK Buyers & Engineers<\/h2>\n

Practical answers to the most common enquiries about J QD bushings in British industrial settings<\/p>\n

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What is the correct cap screw size and wrench torque for fitting a J QD bushing to a conveyor drive shaft in a UK manufacturing plant?<\/p>\n<\/div>\n

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The J QD bushing uses a 5\/8 \u2013 11 UNC cap screw torqued to 1,620 in.\/lbs. with a calibrated torque wrench. Tighten in alternating sequence \u2014 never in a single continuous pass \u2014 to ensure the split taper seats evenly across the bore circumference. No extensions should be used on the wrench handle as this makes controlled torque application difficult and risks over-stressing the bushing split.<\/p>\n<\/div>\n<\/div>\n

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Where can a UK engineering buyer get a competitive price and fast delivery quote for J QD bushings in metric bore sizes for pump drive shafts?<\/p>\n<\/div>\n

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Email your shaft diameter, keyway specification, and required quantity to sales@qd-bushings.top<\/a>. Metric bore sizes from 40mm through 110mm are stocked or available as short-run custom orders with typical UK delivery of 3\u20137 working days from confirmation. We are happy to match current supplier pricing \u2014 send us your existing quote for comparison.<\/p>\n<\/div>\n<\/div>\n

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How do I dismantle a J QD bushing from a sprocket hub without damaging the shaft on a UK food processing line?<\/p>\n<\/div>\n

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Remove the pull-up bolts and reinsert them into the extraction holes threaded into the bushing flange. Wind the screws in evenly and they bear against the hub face, generating a controlled jacking force that releases the taper cleanly \u2014 no press, no puller required. The shaft surface is fully protected throughout this process. The full operation typically takes under 15 minutes, making it well-suited to tight food production shutdown windows.<\/p>\n<\/div>\n<\/div>\n

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Which bore sizes are available for J QD bushings in the UK, and are custom or non-standard bores available for legacy imperial or European metric shafts?<\/p>\n<\/div>\n

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Standard J QD bushings are available from 1-7\/16 inches through 4-3\/8 inches imperial and 40mm through 110mm metric \u2014 covering both legacy British imperial shaft standards and contemporary European metric specifications. Non-catalogue bore sizes, double keyways, and DIN 6885 metric keyway slots are available as custom orders via our manufacturing programme. Contact sales@qd-bushings.top with your exact shaft drawing or specification for a custom bore quotation.<\/p>\n<\/div>\n<\/div>\n

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Is the cost of J QD bushings in the UK competitive when total maintenance savings are accounted for compared with conventional setscrew hubs for conveyor and pump drives?<\/p>\n<\/div>\n

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J QD bushings carry a small unit price premium over basic setscrew hubs, but maintenance savings typically recoup this within the first changeover cycle. The tool-free removal process eliminates shaft damage costs, specialist labour charges, and unplanned downtime caused by hub seizure. UK plant managers running conveyor or pump drives through multiple annual maintenance cycles generally report net cost savings per year once labour, shaft refurbishment avoidance, and downtime reduction are included in the calculation.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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UK TRADE & OEM ENQUIRIES \u2014 SAME-DAY RESPONSE<\/p>\n

Specify J QD Bushings with Confidence \u2014 Get a Quote Today<\/h2>\n

Standard stock, custom bores, or full powertrain component supply \u2014 our UK trade desk responds to every enquiry within one business day. Send your shaft specification and required quantity and we will confirm availability, lead time, and competitive pricing return of post.\"QD<\/p>\n

\u2709\u00a0 Get a Quote \u2014 sales@qd-bushings.top<\/a><\/p>\n

qd-bushings.top \u00a0\u00b7\u00a0 15+ Years Manufacturing Experience \u00a0\u00b7\u00a0 OEM & ODM Service Available \u00a0\u00b7\u00a0 UK Trade Delivery 3\u20137 Working Days \u00b7 edit by gzl<\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

J QD Type Bushing \u2014 solid steel split-taper locking hub, bore 1-7\/16\u2033\u20134-3\/8\u2033 & 40\u2013110mm metric. 1,620 in.\/lbs torque. UK stock. OEM\/MRO supply.<\/p>","protected":false},"featured_media":627,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[408],"product_tag":[],"class_list":["post-621","product","type-product","status-publish","has-post-thumbnail","product_cat-qd-bushings","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/qd-bushings.top\/tr\/wp-json\/wp\/v2\/product\/621","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/qd-bushings.top\/tr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/qd-bushings.top\/tr\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/qd-bushings.top\/tr\/wp-json\/wp\/v2\/comments?post=621"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/qd-bushings.top\/tr\/wp-json\/wp\/v2\/media\/627"}],"wp:attachment":[{"href":"https:\/\/qd-bushings.top\/tr\/wp-json\/wp\/v2\/media?parent=621"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/qd-bushings.top\/tr\/wp-json\/wp\/v2\/product_brand?post=621"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/qd-bushings.top\/tr\/wp-json\/wp\/v2\/product_cat?post=621"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/qd-bushings.top\/tr\/wp-json\/wp\/v2\/product_tag?post=621"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}