ANSI 25 idler sprocket, 18 teeth, 6.35 mm pitch, on 625 bearing (5 mm bore)

chain-bearing-idler

Use it

(import "parts/chain/IDLER-25-18T-625.ik" as p)

In a design on ink: ask your agent for it by name, or by what it must be.

Dimensions

Frame of reference

Axis z and center plane z=0; chain first pin at origin and pitch+x; sprocket gap+y, B hub+z.