โ๏ธ Lock in power, durability, and precision โ donโt let your drive chain fall behind!
This 21-tooth roller chain sprocket features a 1/4-inch pitch and 12mm bore, crafted from hardened C45 carbon steel with a black oxide coating for superior wear and corrosion resistance. Designed as a Type B single-strand sprocket with a hub and two set screws, it ensures secure shaft mounting and reliable torque transmission in tough industrial applications like milling and drilling machines.
| ASIN | B0C713D4BX |
| Amazon Bestseller | #292,826 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #134 in Mechanical Roller Chain Sprockets |
| Batteries Included | No |
| Batteries Required? | No |
| Color | ใใฉใใฏ |
| Customer Reviews | 4.2 4.2 out of 5 stars (34) |
| Date First Available | September 11, 2023 |
| Item Weight | 75 g |
| Manufacturer | FOCMKEAS |
| Material | ็ญ็ด ้ผ |
| Package Dimensions | 12 x 9.3 x 1.7 cm; 75 g |
| Part number | 21T/12mm Bore |
| Size | 21T/12mm Bore |
| Special Features | ใทใณใฐใซในใใฉใณใ |
| Teeth Per Inch | 0.25 Inches |
F**N
I keep buying this brand and type of roller chain sprocket because they are rugged, remain in place even under a heavy load, and how little sign of wear over time. If drilling the mounting hole out bigger, be sure to use a M5-0.8 tap to clear the grub (set) screw holes.
N**N
10 mm shaft inner diameter, great fit on my flip sky 7070 motor!
R**W
Starts off fine then after use it begins to skip, may have to have someone tack weld at this point due to having used the item.
A**R
As described, good sprocket
H**R
The bore size is actually about 1mm larger than advertised so when tightening down the set screws, the gear twists on the shaft making the sprocket wobble when it spins and therefore unusable.
Trustpilot
2 days ago
2 weeks ago