Sprocket Generator

Specify chain number, number of teeth, sprocket type, and bore diameter to generate a STEP file for a roller chain sprocket.

Standard JIS B 1801:2020 / JIS B 1802-1989 Application Roller Chain Drive

Chain No.

Select standard chain per JIS B 1802-1989

Standard Width (b)

Number of Teeth (z)

teeth

Number of sprocket teeth (9–40)

Sprocket Type

Select hub configuration (A: plate, B: one-side hub, C: both-side hub)

Bore Diameter (d)

Diameter of the center bore (0 = no bore)

Calculated Values

Chain Pitch	12.7 mm
Roller Diameter	7.95 mm
Pitch Diameter (Dp)	49.05 mm
Root Diameter (DB)	41.10 mm
Tip Diameter (Do)	57.00 mm
Central Angle (per tooth)	30.0 °

⚠️ Important Notice

The sprockets generated by this tool are reference implementations based on JIS B 1802-1989. For precision applications, verification with actual roller chains is recommended.

Sprocket Generator

Calculated Values

⚠️ Important Notice

Tags

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Rack Gear

GT2 Pulley

Hemisphere

Socket Head Cap Screw

Poop