Imao’s pulleys are available from a wide variety of materials and sizes.
RABS-R: Round-Belt Idle Pulleys
・ For round belts
・ Steel body for high wear resistance
・ Stable rotation with ball bearing
・ Applicable to 4 - 8mm diameter round belts
・ For 6mm, 8mm, 10mm and 12mm diameter spindle
Materials:
Pulley body: S45C Steel, Electroless nickel plated finish
Bearing and Retaining Ring: Steel
Datasheet: https://www.imao.co.jp/files/on-cat/pdf/en/rabs-r-e.pdf