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Workshop Add Bore & Keyway Service

+ £0.00 (£0.00 each)

Order total (product + machining): £12.40

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: HTDPB228M50 HTD Timing Belt Pulleys

22-8M-50 HTD PULLEY PILOT BORE

Name: 22-8M-50 HTD Pulley PILOT BORE | UK Stock | Arrow Engineering
SKU: HTDPB228M50
Price: 12.40 GBP
Availability: InStock

£12.40

ex. VAT · £14.88 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)

Bore Type

Pilot Bore

Pitch Diameter (mm)

56.02

Outside Diameter (mm)

54.65

Face Width (mm)

Min Bore (mm)

Max Bore (mm)

Weight

1kg

Dimensions (L × W × H)

5.5 × 5.5 × 6 cm

Overall envelope

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	HTDPB228M50	Aroflex part number
Number of Teeth	22
Pitch (mm)	8
Belt Width (mm)	50
Bore Type	Pilot Bore
Pitch Diameter (mm)	56.02
Outside Diameter (mm)	54.65
Face Width (mm)	58
Min Bore (mm)	12
Max Bore (mm)	35
Weight	1 kg
Dimensions	5.5 × 5.5 × 6 cm	Overall envelope
Bore Tolerance	H7	Precision transition fit
Certification	ISO 9001:2015	Quality assured

22-8M-50 HTD Pilot Bore Timing Pulley

The compact, extra-wide 22-8M-50 HTD Pilot Bore Timing Pulley is engineered to deliver reliable synchronous power tracking in space-restricted environments. Its 22 teeth guide wide-format 50mm timing belts along an accurate 8mm curvilinear path, providing ultimate protection against tooth shearing or belt ratcheting under high-shock startups. Arriving as a blank pilot bore stock piece, the center hub leaves engineers free to ream out custom shaft openings.

Product Features & Specifications

Tooth Configuration: 22 high-capacity precision-machined teeth.
Pitch & Belt Width: 8mm high-torque drive spacing optimized for heavy-load 50mm wide timing belts.
Bore Status: Stock plain Pilot Bore core to allow comprehensive custom machine-shop modifications.
Industrial Materials: Precision-cast solid Steel (St) or structural Cast Iron (GG) built to maintain immense mechanical strength.
Boring & Keying Readiness: Provided in standard raw stock configuration. Tailor the internal bore sizes directly to your shafts via our In-House Machining Services.

22-8M-50 Pilot Bore HTD Pulley Structure Layout

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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.
  
 
      Posted on Google  
   
   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