Genuine DeWalt bearing, part number 861721-12 — a sealed deep‑groove ball bearing (6203‑2RS) with a bore of 17 mm, outer diameter 40 mm and width 12 mm; double rubber seals and factory grease make it ready to install in motor/spindle positions where a sealed radial bearing is required.

Fits a range of DeWalt mitre saws and grinders — example models listed for this part include DW709, DW710, DW711, DW720 (and DW720K), DW1251/DW1253, DW250/DW252 families and several related Black & Decker tool . This genuine DeWalt spare is one of the common DeWalt parts used in mitre saw and grinder repairs.