Model: #25 Roller Chain Sprocket B Type 20 Tooth, 15mm Bore, 6.35mm (1/4") Pitch, for ISO 04C Chain. Material: The sprocket is made of C45 carbon steel with a full black oxide coating, which is rust-proof. The tooth part uses high-temperature quenching heat treatment, high hardness, wear resistance, a long service life, and is easy to use Design: Each roller sprocket is equipped with strong teeth to lock the chain well. The keyway has set screws and forms a 90-degree angle with the set screw after installation, which can fix the shaft and prevent it from slipping Installation: Chain Sprockets are normally mounted in a fixed position on a fixed shaft. The chain sprocket should not rotate at a greater speed than is allowable for drive sprockets of the same size. It is suggested that chain sprockets have at least three teeth in mesh with the chain Wide Application: Sprockets can be used in various industrial areas, especially in power transmission industrial machinery, such as milling machines, drilling machines, drilling rigs, or other mechanical transmission occasions Description:
Material - The sprocket is made of C45 carbon steel with a full black oxide coating, which is rust-proof. The tooth part uses high-temperature quenching heat treatment, high hardness, wear resistance, a long service life, and is easy to use.
Design - Each roller sprocket is equipped with strong teeth to lock the chain well. The keyway has set screws and forms a 90-degree angle with the set screw after installation, which can fix the shaft and prevent it from slipping.
Installation - Chain Sprockets are normally mounted in a fixed position on a fixed shaft. The chain sprocket should not rotate at a greater speed than is allowable for drive sprockets of the same size. It is suggested that chain sprockets have at least three teeth in mesh with the chain.
Wide Application - Sprockets can be used in various industrial areas, especially in power transmission industrial machinery, such as milling machines, drilling machines, drilling rigs, or other mechanical transmission occasions.

Specification：
Material: C45 Carbon Steel
Finish: Black Oxide
Number of Teeth: 20
Outside Diameter: 43.5mm / 1.71-inch
Bump Width: 12mm / 0.47-inch
Total Width: 15mm / 0.59-inch
Bore Diameter: 15mm / 0.59-inch
Keyway Size: 5 x 2.3mm / 0.2 x 0.09-inch(L*W)
Pitch: 1/4-inch / 6.35mm
Tooth Width: 3mm/ 0.12-inch
Set Screw Size: M5

Package Content:
2 x Chain Sprocket
4 x Set Screws