25 Teeth Sprocket 1/4" Pitch, 15mm Bore Carbon Steel, Keyway with Set Screws 10mm X 55mm It applies to 180 210

It applies to 180 210 250 class rack

The smaller of the 2 measurements such as 78

It can accurately transmit the speed without slip

Inner Diameter x Outer Diameter: 7 x 10 mm

<5> 3mm ------ 30pcs

25 Teeth Sprocket 1/4" Pitch, 15mm Bore Carbon Steel, Keyway with Set Screws 10mm X 55mm It applies to 180 210Features: 1. Chain Sprockets are normally mounted in a fixed position on a fixed shaft. Keyway with 2pcs Set Screws at 90 degrees. The shaft can be fixed well, which is convenient to use. 2. The chain sprocket should not rotate at a greater speed than is allowable for drive sprockets of the same size. Every roller chain sprocket comes with strong teeth that can latch onto the chain. It is suggested that chain sprockets have at least three teeth in