





⚙️ Elevate your machine’s performance with precision and durability that won’t quit!
The FOCMKEAS 21-tooth roller chain sprocket features a 1/4-inch pitch and 12mm bore, crafted from heat-treated C45 carbon steel with a black oxide coating for superior wear and corrosion resistance. Its Type B hub design includes fixing screws to prevent shaft slippage, making it a reliable choice for demanding industrial power transmission tasks.








| Manufacturer | FOCMKEAS |
| Part number | 21T/12mm Bore |
| Item Weight | 81.8 g |
| Package Dimensions | 8 x 8 x 2.01 cm; 81.93 g |
| Size | 21T/12mm Bore |
| Color | ブラック |
| Material | 炭素鋼 |
| Teeth Per Inch | 0.25 Inches |
| Special Features | シングルストランド |
| Batteries Included | No |
| Batteries Required? | No |
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