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SKU: HTDPB728M85
HTD Timing Belt Pulleys
72-8M-85 HTD PULLEY PILOT BORE
£85.80
ex. VAT · £102.96 inc. VAT
JS9 Tight Fit Anti-Roll
H7 Precision Transition Fit
ISO 9001 Quality Assured
Technical Specifications
Number of Teeth
72
Pitch (mm)
8
Belt Width (mm)
85
Bore Type
Pilot Bore (Pre-bored)
Pitch Diameter (mm)
183.35
Outside Diameter (mm)
181.98
Face Width (mm)
95
Stock Pilot Bore (mm)
15
Max Re-Bore Diameter (mm)
80
Weight
8.4kg
Dimensions (L × W × H)
18.2 × 18.2 × 9.5 cm
Overall envelope
Standards & Fit
JS9
JS9 Keyway
Tight fit anti-roll standard
H7
Precision Transition Fit
Precision bore fit
ISO
ISO 9001:2015
Quality Assured
| Parameter | Value | Notes |
|---|---|---|
| SKU | HTDPB728M85 | Aroflex part number |
| Number of Teeth | 72 | |
| Pitch (mm) | 8 | |
| Belt Width (mm) | 85 | |
| Bore Type | Pilot Bore (Pre-bored) | |
| Pitch Diameter (mm) | 183.35 | |
| Outside Diameter (mm) | 181.98 | |
| Face Width (mm) | 95 | |
| Stock Pilot Bore (mm) | 15 | |
| Max Re-Bore Diameter (mm) | 80 | |
| Weight | 8.4 kg | |
| Dimensions | 18.2 × 18.2 × 9.5 cm | Overall envelope |
| Bore Tolerance | H7 | Precision transition fit |
| Certification | ISO 9001:2015 | Quality assured |
72-8M-85 HTD Timing Pulley [Pilot Bore Variant]
The larger 72-8M-85 HTD Timing Pulley offers smooth mechanical reduction ratios and high structural torque tracking. Spreading critical radial stress cleanly across wide 85mm timing belts, its 72 curvilinear teeth deliver stable speed profiling. The pilot-bored center allows custom lathe work to adapt this pulley onto large diameter machinery shafts.
Product Features & Specifications
- Tooth Configuration: 72 precision-machined synchronous HTD teeth.
- Pitch & Belt Width: 8mm high-torque drive profile engineered for 85mm wide timing belts.
- Bore Status: Unfinished Pilot Bore center layout to facilitate specialized post-purchase reaming.
- Industrial Build Quality: Built with premium high-strength Cast Iron (GG) or Steel (St).
- 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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