Original Makita ball bearing — part no. 210017-7 (designation 607DDW). This is a precision deep-groove ball bearing with inner diameter 7 mm, outer diameter 19 mm and width 6 mm (7 × 19 × 6 mm), supplied as the genuine Makita replacement used in motor and rotor assemblies.
Compact and fully sealed for tool use, it’s made to drop into the bearing seat without modification so you can restore smooth, low-vibration rotation in sanders, planers and similar handhelds. Example Makita models that use part 210017-7 include BO5011 (random orbital sander) and several BO50xx series sanders/planers and related models; it’s also listed on parts diagrams for DLS600Z and a range of other Makita tools such as GA4550 and BO5010. (check your tool’s parts diagram or model parts list before installing.)
Why this part: it’s the original Makita bearing specified for those assemblies, sized to the factory tolerances so the armature or spindle runs true and brushes wear evenly — a direct-fit replacement to get a tool back to service quickly.
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