Bosch 2610350311 — genuine Bosch deep‑groove ball bearing (cataloged as 2 610 350 311). This is a sealed, radial/deep‑groove bearing equivalent to the R8 / 99R8 size (1/2" ID × 1‑1/8" OD × 5/16" width), double‑sealed and pre‑lubricated for electric‑motor/tool use.

Why this part matters: it reduces friction and supports the motor/spindle in circular saws and other rotating assemblies, so replacing a worn bearing restores smooth blade spin and reduces vibration and noise. The 2610350311 is listed specifically for Bosch circular saw lines such as the GKS 65 / GKS 7‑1/4 types and appears in parts breakdowns for several older Bosch/Skil circular saw models.

Fits also : Bosch GKS 65 (GKS 7‑1/4) and related Bosch circular saw types; 1655, 1656 and 1657 and some Skil saw types that share the same bearing.

Notes for installation: same footprint as standard R8/99R8 deep‑groove bearings (12.7 mm × 28.575 mm × ~7.9 mm), so it can be swapped into the original bearing seat—press fit recommended and seal faces should be kept clean during install.

If you need the exact fit for your saw, match the part number 2610350311 (aka 2.610.350.311) and the R8/99R8 dimensions above to your tool’s parts diagram before installing which can be found here : https://www.powertoolspares.com/bosch

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