SKF PHS12B-3TBH21 — Metric roller-chain sprocket (ISO / DIN 8187)
SKF · Bearings & Power Transmission · Roller Chain Sprockets — Metric
SKF PHS12B-3TBH21 metric roller-chain sprocket (iso / din 8187). Machined-tooth roller-chain sprocket cut to the ISO 606 / DIN 8187 metric roller chain series (04B, 05B, 06B, 08B, 10B, 12B, 16B, 20B, 24B). Simplex, duplex or triplex tooth profile per fitted chain execution. Bored for taper-lock bushing or pilot-bore. Hardened teeth (case-hardened C45E) standard. 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
- PHS12B-3TBH21
- 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Also known as — OEM cross-references & superseded numbers
- Renold 12321
- Tsubaki 12321
- Martin Sprocket 12321
- Rexnord 12321
- Competitor equivalent: 12321 (Renold)
- Competitor equivalent: 12321 (Tsubaki)
- Competitor equivalent: 12321 (Martin Sprocket)
- Competitor equivalent: 12321 (Rexnord)
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