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SKU: HTDPB213M09
HTD Timing Belt Pulleys
21-3M-09 HTD PULLEY PILOT BORE
£2.42
ex. VAT · £2.90 inc. VAT
JS9 Tight Fit Anti-Roll
H7 Precision Transition Fit
ISO 9001 Quality Assured
Technical Specifications
Number of Teeth
21
Pitch (mm)
3
Belt Width (mm)
9
Bore Type
Pilot Bore
Pitch Diameter (mm)
20.05
Outside Diameter (mm)
19.29
Face Width (mm)
14
Min Bore (mm)
6
Max Bore (mm)
15
Weight
0.02kg
Dimensions (L × W × H)
24 × 24 × 1.3 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 | HTDPB213M09 | Aroflex part number |
| Number of Teeth | 21 | |
| Pitch (mm) | 3 | |
| Belt Width (mm) | 9 | |
| Bore Type | Pilot Bore | |
| Pitch Diameter (mm) | 20.05 | |
| Outside Diameter (mm) | 19.29 | |
| Face Width (mm) | 14 | |
| Min Bore (mm) | 6 | |
| Max Bore (mm) | 15 | |
| Weight | 0.02 kg | |
| Dimensions | 24 × 24 × 1.3 cm | Overall envelope |
| Bore Tolerance | H7 | Precision transition fit |
| Material | Steel / Friction disc | Standard construction |
| Certification | ISO 9001:2015 | Quality assured |
21-3M-09 HTD Pilot Bore Timing Pulley
The 21-3M-09 HTD Timing Pulley delivers reliable speed tracking and high mechanical durability across automated equipment networks. Spreading rotational forces across narrow 9mm timing belts via its 21 deep curvilinear teeth, it minimizes friction and optimizes load transfer value profiles. The central hub arrives as a plain pilot bore to accommodate custom reaming to non-standard tolerances.
Product Features & Specifications
- Tooth Configuration: 21 precision-machined heavy-duty HTD teeth.
- Pitch & Belt Width: 3mm industrial pitch designed for 9mm wide timing belts.
- Bore Status: Unfinished Pilot Bore center layout to facilitate specialized post-purchase reaming.
- Premium Material Properties: Built with premium Aluminum UNI 9006 – T6 (Al) to maintain structural reliability.
- 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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