SKF PHP21-8M-20RSB — Timing belt pulley (synchronous sprocket)
SKF · Bearings & Power Transmission · Timing Belt Pulleys
SKF PHP21-8M-20RSB timing belt pulley (synchronous sprocket). Steel or aluminium synchronous drive pulley cut to match a paired timing-belt tooth profile — MXL, XL, L, H, XH, HTD 3M / 5M / 8M / 14M, Poly Chain GT 8MGT / 14MGT. Flanged or unflanged. Bored for taper bushing or supplied pilot-bore for final machining. Dimensioned to ISO 5296 / DIN 7721. Designation follows the SKF alphanumeric identification convention where the numeric block encodes the boundary plan and the suffix declares execution options (material, sealing, cage, precision, clearance, lubricant). Genuine SKF supply carries the SKF logo etch or moulded mark and hologram-authenticated packaging.
Specifications
- Part number
- PHP21-8M-20RSB
- HS code
- 8483.50
- Material
- As declared by SKF designation suffix
- Temperature range
- Per SKF product data
- Standard
- SKF designation convention (see description for governing ISO / DIN)
Compatibility
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.
Also known as — OEM cross-references & superseded numbers
- Martin Sprocket 21820
- Browning 21820
- Optibelt 21820
- Competitor equivalent: 21820 (Martin Sprocket)
- Competitor equivalent: 21820 (Browning)
- Competitor equivalent: 21820 (Optibelt)
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