Description
21MP012-6FA2 Timing Pulley, 21 Teeth, MXL Pitch, 3/16 in Bore
The 21MP012-6FA2 is a 21-tooth MXL (0.080 in trapezoidal) timing pulley with a 3/16 in finished bore, machined from aluminum with a clear anodized finish, built for 0.125 in wide belts. Machined from solid stock, never sintered or powdered metal.
$50 minimum order on drive components. Mix and match any pulleys, bushings, sheaves, sprockets, and accessories in your cart to reach the $50 minimum. Questions? Call (888) 203-2358.
Specifications

Dimension key for this construction type. Values for this part number are in the table below.
| Specification | Value |
|---|---|
| Part Number | 21MP012-6FA2 |
| Teeth | 21 |
| Pitch | MXL (0.080 in trapezoidal) |
| For Belt Width | 0.125 in |
| Pitch Diameter | 0.5348 in |
| Outside Diameter | 0.515 in |
| Flange Diameter | 0.71 in |
| Bore | 3/16 in finished bore |
| Face Width | 0.26 in |
| Overall Length | 0.484 in |
| Hub Diameter | 0.39 in |
| Construction | Standard Hub |
| Set Screws | 2 x 4-40 |
| Flange Material | Aluminum |
| Material | Aluminum (no sintered or powdered metal) |
| Finish | Clear Anodized |
| Weight | 0.0084 lb |
| Country of Origin | India |
Applications
- Instrumentation, office equipment, and precision positioning drives
- 3D printers and desktop CNC equipment
- Robotics, medical devices, and packaging machinery
Belt Compatibility
The 21MP012-6FA2 runs MXL (0.080 in trapezoidal) belts in 0.125 in width. The pitch is standardized, so belt and pulley brands can be mixed.
Cross Reference
The 21MP012-6FA2 interchanges with these equivalent part numbers, per published manufacturer interchange data:
| Manufacturer | Equivalent Part Number |
|---|---|
| Gates® | PB21MXL012 |
| Mitsuboshi | 21-MP012-6FA2 |
| Stock Drive Products (SDP/SI) | A 6N16-022DF1206 |
| Neuman | 21MP-012-3/16-6FCA |
| W.M. Berg | TP7A3W2-21 |
| Powerdrive | 21MP012-6FA2 |
Always verify dimensions and bore size before substituting part numbers across manufacturers.
Buying in bulk? Save on volume.
Multi-unit and OEM quantities qualify for volume discounts. Call or email for a quantity quote.
Frequently Asked Questions
What belts fit the 21MP012-6FA2 pulley?
MXL (0.080 in trapezoidal) timing belts in 0.125 in width from any manufacturer. The pitch is standardized, so belt and pulley brands can be mixed.
Does the 21MP012-6FA2 replace the Gates PB21MXL012?
Yes. Published interchange data crosses the 21MP012-6FA2 directly to the Gates PB21MXL012, as well as Mitsuboshi 21-MP012-6FA2, Stock Drive Products A 6N16-022DF1206, Neuman 21MP-012-3/16-6FCA. Verify dimensions and bore before ordering.
Does the 21MP012-6FA2 ship from Houston?
Yes. Stock items ship same day from our Houston, Texas warehouse. Call (888) 203-2358 to confirm availability.
Need a quote on 21MP012-6FA2?
Houston warehouse, same-day shipping on stock items.
Call (888) 203-2358All third-party part numbers and trademarks referenced are the property of their respective owners. References are for compatibility identification only and do not imply affiliation or endorsement.
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