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SKU: HTDPB388M85
HTD Timing Belt Pulleys
38-8M-85 HTD PULLEY PILOT BORE
£41.80
ex. VAT · £50.16 inc. VAT
JS9 Tight Fit Anti-Roll
H7 Precision Transition Fit
ISO 9001 Quality Assured
Technical Specifications
Number of Teeth
38
Pitch (mm)
8
Belt Width (mm)
85
Bore Type
Pilot Bore (Pre-bored)
Pitch Diameter (mm)
96.77
Outside Diameter (mm)
95.4
Face Width (mm)
95
Stock Pilot Bore (mm)
12
Max Re-Bore Diameter (mm)
48
Weight
2.45kg
Dimensions (L × W × H)
9.5 × 9.5 × 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 | HTDPB388M85 | Aroflex part number |
| Number of Teeth | 38 | |
| Pitch (mm) | 8 | |
| Belt Width (mm) | 85 | |
| Bore Type | Pilot Bore (Pre-bored) | |
| Pitch Diameter (mm) | 96.77 | |
| Outside Diameter (mm) | 95.4 | |
| Face Width (mm) | 95 | |
| Stock Pilot Bore (mm) | 12 | |
| Max Re-Bore Diameter (mm) | 48 | |
| Weight | 2.45 kg | |
| Dimensions | 9.5 × 9.5 × 9.5 cm | Overall envelope |
| Bore Tolerance | H7 | Precision transition fit |
| Certification | ISO 9001:2015 | Quality assured |
38-8M-85 HTD Timing Pulley [Pilot Bore Variant]
The 38-8M-85 HTD Timing Pulley features a blank pilot bore center design, granting mechanical engineers ultimate customization freedom for bespoke machining. Tailored with an 8mm pitch curvilinear profile to match 85mm wide timing belts, its structure prevents synchronous drive slip under heavy radial loading. Arriving unbored with a small stock center guide hole, this pulley can be bored, step-reamed, or keywayed to exact shaft layouts.
Product Features & Specifications
- Tooth Configuration: 38 precision-machined synchronous HTD teeth.
- Pitch & Belt Width: 8mm high-torque drive profile engineered for 85mm wide timing belts.
- Bore Status: Unmachined Pilot Bore center hub to accommodate customized machine shop adjustments.
- Industrial Build Quality: Cast and finished from high-grade solid Steel (St) or Cast Iron (GG).
- 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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