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Workshop Add Bore & Keyway Service

+ £0.00 (£0.00 each)

Order total (product + machining): £136.89

Price varies by bore size and Bore Qty (per machined hub).

Bore size (Hub 1)

Bore size (Hub 2)

Bore Qty (machined items)

Max equals product quantity.

Please Confirm any Additional Machining Details Required (optional)

Keyway size (optional)

Price Breakdown

Up to 25mm (0.984") – (£15)
Up to 40mm (1.575") – (£20)
Up to 60mm (2.362") – (£30)
Over 60mm (2.362"+) – (£45)

Quantity Discount Breakdown

1 to 5 items: No discount
6 to 9 items: 10% off
10 to 19 items: 15% off
20 to 49 items: 20% off
50 to 99 items: 25% off
100+ items: 30% off

SKU: 56-8M-85.PB Timing Belt Pulley Pilot Bore

Timing Belt Pulley 56-8M-85.PB

Name: 56-8M-85 HTD Pulley Pilot Bore | UK Stock | Arrow Engineering
SKU: 56-8M-85.PB
Price: 136.89 GBP
Availability: InStock

£136.89

ex. VAT · £164.27 inc. VAT

JS9 Tight Fit Anti-Roll H7 Precision Transition Fit ISO 9001 Quality Assured

In Stock — Dispatches within 24 hours. Bulk orders (10+) available — call for lead time.

Technical Specifications

Number of Teeth

Pitch (mm)

Belt Width (mm)

Pitch Diameter (mm)

142.6

Outside Diameter (mm)

141.23

Bore Type

Pilot Bore (PB)

Stock Pilot Bore (mm)

Material Type

Steel / Cast Iron

Weight

9.8kg

Standards & Fit

JS9

JS9 Keyway Tight fit anti-roll standard

Precision Transition Fit Precision bore fit

ISO

ISO 9001:2015 Quality Assured

Parameter	Value	Notes
SKU	56-8M-85.PB	Aroflex part number
Number of Teeth	56
Pitch (mm)	8
Belt Width (mm)	85
Pitch Diameter (mm)	142.6
Outside Diameter (mm)	141.23
Bore Type	Pilot Bore (PB)
Stock Pilot Bore (mm)	15
Material Type	Steel / Cast Iron
Weight	9.8 kg
Bore Tolerance	H7	Precision transition fit
Certification	ISO 9001:2015	Quality assured

PB56-8M-85 HTD Timing Pulley Pilot Bore

The PB56-8M-85 HTD Timing Pulley delivers precision, high-torque synchronous power transmission for industrial drive setups requiring exact timing and zero slip. Featuring a high-performance curvilinear 8M tooth profile, this pulley spreads mechanical loads evenly to prevent belt tooth shear under demanding operational cycles. Designed for use with 85mm wide synchronous belts, it is supplied as a plain minimum pilot bore configuration, offering the ultimate flexibility to be custom bored and keyed directly to your unique drive shaft dimensions.

Product Features & Specifications

Tooth Configuration: 56 precision-machined HTD teeth.
Pitch & Belt Width: High-Torque Drive 8mm pitch dimensioned specifically for 85mm wide timing belts.
Shaft Mounting System: Stock Pilot Bore (Plain Minimum Bore) allowing for precision custom machining.
Industrial Build Quality: Rigidly manufactured using premium Steel (St) or Cast Iron (GG) to ensure high durability and exceptional wear resistance.
Boring & Keying Readiness: Provided in standard raw stock configuration. Tailor the internal bore sizes directly to your shafts via our In-House Machining Services.

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      EXCELLENT  
   Based on 15 reviews 
    
 
 
 
   
 
 
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   H Cunningham 
 18 February 2025
 
 
 Trustindex verifies that the original source of the review is Google. Very helpful, friendly staff.
  
 
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   P Wâtëŕs 
 16 August 2023
 
 
 Trustindex verifies that the original source of the review is Google. Excellent service and customer support.  Professional staff. And really informative.
  
 
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   T hall 
 29 November 2021
 
 
 Trustindex verifies that the original source of the review is Google. Very helpful company....above 5 star rated.
  
 
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   B Kennedy 
 16 November 2020
 
 
 Trustindex verifies that the original source of the review is Google. Very very helpful a pleasure to deal with you
  
 
      Posted on Google  
   
   D Birch 
 25 October 2020
 
 
 Trustindex verifies that the original source of the review is Google. Everytime ive been here they have had what i needed, and good prices, so all good with me