B Bushing With 36mm Bore

Rapid Installation & Removal

The QD concept reduces drivetrain assembly and maintenance time dramatically. With three cap screws, a standard spanner, and no special tooling, installation or removal is achievable in under ten minutes even in confined plant environments. The reversible flange design offers mounting flexibility that conventional interference-fit hubs simply cannot match — particularly useful where bearing housings or frame structure limits axial clearance. UK maintenance engineers consistently identify this time saving as one of the most significant factors in reducing total cost of ownership across their conveyor and drive fleets.

Precision Machined to Tight Tolerances

Every Type B bushing is machined to dimensional tolerances that guarantee a slip-fit on the shaft before tightening and a zero-clearance interference fit once the screws are torqued to specification. This level of precision removes shaft fretting and micro-movement — common failure modes in applications with cyclic loading or reversing torque. The result is a longer service life for both the bushing and the shaft, reducing replacement frequency and the cost of unplanned breakdowns in UK packaging, quarrying, and conveyor operations where production continuity is non-negotiable.

High-Grade Steel for Extreme Loads

Fabricated from premium carbon steel with controlled heat treatment, our Type B bushings achieve the hardness and tensile strength demanded by continuous-duty operation under high torque. The 192 lbs-in wrench torque rating and three-bolt clamping pattern generate a holding force that comfortably exceeds shear loads encountered in agricultural PTO drives, industrial chain conveyors, and pump systems. For food processing, pharmaceutical, or marine environments, we supply the same dimensional geometry in AISI 316L stainless steel with full material certification — a capability that many UK distributors cannot offer from stock.

Custom Solutions & UK-Wide Supply

Our factory OEM and ODM service covers bore modifications, non-standard keyway profiles, dual-keyway configurations, surface treatment upgrades (black oxide, zinc plating, PTFE), and customer-branded packaging — all achievable from a minimum of 10 pieces. With over 15 years of manufacturing history and a dedicated UK export operation, we serve British businesses from single-unit emergency replacements to long-term bulk supply contracts. Technical drawings, material certificates, and dimensional reports are provided on request to support procurement and quality audits.

MECHANISM

Self-Locking Taper Principle

The QD bushing operates on a precision-ground external taper matched to the internal hub bore of the driven component. As the cap screws are progressively and alternately torqued, the bushing is drawn axially into the hub, generating a uniform radial clamping load around the full shaft circumference. This wedge geometry is inherently self-locking — the taper angle is deliberately chosen to prevent back-driving under sustained vibration or cyclic load reversal, eliminating the creep and micro-slip that eventually leads to shaft damage and fretting corrosion. The result is a rigid, zero-backlash assembly that remains secure throughout its service life without requiring periodic re-torquing, provided installation torque was applied correctly at the outset.

MATERIAL

Steel Grade & Surface Treatment

Our Type B bushings are produced from medium-carbon steel equivalent to BS 970 080M46 (AISI 1045), offering an excellent balance of machinability during production and mechanical performance in service. The bore surface and taper receive controlled induction hardening to resist fretting wear and indentation under the sustained clamping loads present during operation. The body retains a tough, impact-resistant core capable of absorbing shock loads. For UK food manufacturing, pharmaceutical production, or marine applications subject to washdown or corrosive atmospheric exposure, we supply the identical geometry in AISI 316L stainless steel with full EN 10204 3.1 material certificates available on request — a genuine performance and compliance differentiator.

APPLICATIONS

Where Type B Bushings Are Specified

Type B QD bushings with 36mm bore are found across a broad spread of UK sectors. In agricultural machinery — combine harvesters, bale presses, grain augers — they connect chain sprockets to PTO shafts subject to sudden shock loads at engagement. In conveyor and material handling systems, they mount timing pulleys and V-belt sheaves on drive shafts where frequent belt changes demand rapid removal. Pumping, mixing, and chemical processing applications benefit from the high clamping torque that prevents creep under sustained radial and axial load combinations. The reversible flange geometry also suits installations where the driven component must sit close to a bearing housing with limited outboard clearance, making the Type B one of the most versatile sizes in the QD range.

Forward & Reverse Flange Installation Positions

Assembled Drive System — QD Bushing, Sprocket & Shaft

▼ Installation

1. Ensure the bushing taper and hub bore are clean, dry, and completely free of any anti-seize lubricant or grease — contamination prevents correct clamping.
2. Locate the bushing inside the sprocket, pulley, or sheave hub as a free slip fit — no force should be needed at this stage.
3. Insert the three cap screws loosely into the pull-up holes. The assembly should remain freely moveable on the shaft.
4. Slide the assembly onto the shaft using the keyway for rotational alignment and position it at the required axial location.
5. Alternately and incrementally tighten the cap screws to 192 lbs-in. Confirm a visible gap remains between the bushing flange and hub face — this gap confirms correct taper engagement.

▲ Removal

1. Loosen and fully remove all three cap screws from the pull-up holes.
2. Transfer the cap screws into the threaded extraction holes in the bushing flange — these are purpose-designed for this procedure.
3. Tighten the screws evenly and alternately. The bushing taper is forced out of the hub, releasing clamping grip on the shaft.
4. Once the driven component runs freely, slide the entire assembly off the shaft. The bushing and hub separate cleanly with no damage to shaft or bore.

“We operate 22 conveyor head shafts at our grain processing facility in Lincolnshire and standardised on these Type B bushings across the entire site. The dimensional consistency from batch to batch is genuinely impressive — our maintenance team no longer needs to verify fit on every installation. Lead times to the East Midlands have been reliable, and the pricing undercuts what we were previously paying to a domestic distributor.”

James Hartley

Head of Engineering — Lincolnshire Grain Cooperative, UK

“As a plant maintenance contractor covering multiple food processing sites across the West Midlands, I need components that arrive correctly dimensioned and ready to fit without rework. These QD bushings have performed without issue across twelve separate installations over eight months. The stainless steel option for our washdown zones is a genuine differentiator — most suppliers we had previously used simply could not offer stainless from stock at a competitive price.”

Sarah Dennison

Mechanical Contractor — SRD Engineering Services, Birmingham, UK

“Our quarry in Derbyshire runs crushing and screening equipment up to 16 hours a day and we cannot absorb extended drive maintenance windows. These bushings have cut our sheave changeover time from around 40 minutes to under eight. The quality matches what we previously paid significantly more for through a UK distributor, and the technical support when specifying bore sizes for a non-standard shaft was exactly what we needed. Recommended without reservation.”

Tom Griffiths

Operations Manager — Peak Aggregates Ltd, Derbyshire, UK

What is the typical lead time for ordering QD bushings from a UK supplier, and do you hold Type B 36mm stock ready for same-week despatch?

Standard Type B bushings in 36mm bore are held in stock and orders placed before 2pm GMT typically leave our facility on the same working day via tracked UK courier. Larger volume orders or custom configurations carry a production lead time of 10–15 working days, confirmed at quote stage. Send your requirements to [email protected] for a current stock check and competitive pricing.

How much does a Type B QD bushing cost, and what factors affect the price when I’m requesting a quote for agricultural machinery maintenance in the UK?

Unit cost varies with order quantity, bore specification, material grade (carbon vs stainless), and any custom features. Volume-tier pricing applies from 10, 50, and 100+ pieces. Agricultural customers often benefit from seasonal pricing reviews. Share your quantity and part specification and we will build a personalised quote aligned to your budget and application requirements.

Which UK industrial sectors use QD bushings most, and where exactly on a conveyor or agricultural machine are they typically installed?

QD bushings are specified across UK food and beverage processing, grain handling, quarrying and aggregates, packaging machinery, water treatment, and general engineering. On a conveyor they most commonly mount chain drive sprockets or V-belt sheaves to the head shaft. In agricultural equipment they appear on PTO input shafts and combine harvester threshing drum drives. Any drive application requiring periodic driven component removal is a natural candidate for QD technology.

Are your QD bushings interchangeable with other brands already fitted to my existing machinery, and how do I verify dimensional compatibility before placing an order?

Yes — our bushings conform to the same dimensional standard as the original design, making them drop-in compatible with hubs, pulleys, and sprockets from all major manufacturers. To verify compatibility, confirm bushing type (B), bore diameter (36mm), and keyway specification. Share your existing part number with our team and we will confirm suitability before you commit to an order. Certified dimensional drawings are available on request.

When should I upgrade to a stainless steel QD bushing for my UK food processing plant rather than continuing with standard carbon steel?

Stainless steel is the correct choice when the drive environment involves regular washdowns with water or cleaning chemicals, proximity to food contact surfaces, or sustained high humidity that causes surface corrosion on carbon steel. UK food manufacturers audited under BRC or SALSA frameworks regularly require stainless throughout their drive systems. Our AISI 316L stainless Type B bushing is held in stock in all standard bore sizes and carries the same dimensional precision as the carbon steel version. Full material certificates accompany every order as standard.

What custom bore or keyway configurations can your factory produce for a bespoke machine build in the UK, and what is the minimum order quantity?

Our full OEM and ODM service covers bore diameter modifications, dual-keyway profiles, set-screw additions, and surface treatment changes including black oxide, zinc plating, or PTFE coating. Custom orders are reviewed by our engineering team and a detailed quote is provided within 24 hours. Standard minimum order quantity for custom variants is 10 pieces, though this varies with complexity. Send your drawing or specification to [email protected] to begin the process.

QD Bushing — Type SD

Compact series for small-diameter assemblies. Available 12–38mm bore, suits light-duty drives.

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QD Bushing — Type SK

Mid-range taper-lock equivalent. Suits sprockets 76–356mm pitch diameter, standard keyway.

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QD Bushing — Type E & F

Heavy-duty large-bore variants for high-torque industrial drives and gearbox output shafts.

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Taper Lock Bushings

European-standard TL/TB series. Drop-in interchangeable across all size codes, stocked in carbon & stainless.

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