PEER Chain
PEER Chain 40B21 - ANSI 40, 21T B-Hub
Model: 40B21
PEER Chain 40B21 B-hub roller chain sprocket. Single strand, one-piece machined B-hub (never welded), ANSI #40 (0.5" pitch) chain, 21 teeth. Carbon steel with hardened teeth. Keyway aligned to tooth center, dual set screws. Bore range: 0.5"-2.4375". Meets ANSI B29.1 standard.
Technical Specifications
| ANSI Number | 40 |
| Teeth | 21 |
| Hub Style | Type B |
| Bore Type | Plain/Min Bore |
| Bore Size | 0.625 |
| Bore Range Min | 0.5 |
| Bore Range Max | 2.4375 |
| Hardened Teeth | Yes |
| Pitch Diameter (in) | 3.355 |
| Outer Diameter (in) | 3.667 |
| Material | Carbon Steel |
| LTB (in) | 0.875 |
| Strand | Single |
| Standard | ANSI B29.1 |
| Finish | Black Oxide |
Manufacturer
PEER Chain
PEER Chain — family-owned manufacturer of ANSI roller chain, PEER Quest solid-bushing chain, and matching sprockets. Serves industrial, agricultural, and material handling applications across ANSI #25–#240.
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