Bosch 2609100661 Spare Part - Flange

2609100862 supersedes older part numbers: 2609100661

Bosch 2609100862 — Bearing flange (2 609 100 862). Compact, genuine Bosch spare designed for the 125 mm random-orbit sander: it locates the bearing at the top side of the sanding pad assembly and keeps the pad running true while reducing friction between the motor drive shaft and the pad.

Fits (example models): GEX 125‑1 AE / GEX 125‑1 A and related ROS series such as ROS10 and ROS20VS / ROS20VSK — check your model label, but this part is the flange used on the 125 mm Bosch random-orbit sanders.

Details you’ll care about: Bosch part number 2609100862 (also shown as 2 609 100 862 or 2.609.100.862). The flange is made to accept the sander’s bearing and sit directly under the sanding pad (125 mm pad diameter on compatible machines), and is sold as the single replacement flange for those assemblies.

Notes: the part is listed as replacing the earlier item 2609100661 on Bosch power tool parts listings, The flange is supplied with the bearing assembled into the housing.

If your sander has scoring, wobble or a noisy pad area, replacing this bearing flange restores proper pad alignment and smooth rotation — a simple swap that gets a 125 mm Bosch random-orbit sander back to correct operation.

Browse our full range of Bosch sander parts.