Makita 510449-1 Spare Part - ROTOR ASS'Y DUR190U/DUR190L
Genuine Makita Rotor Assembly — part no. 510449-1 — direct replacement rotor/armature for Makita cordless grass trimmers. This balanced rotor comes with the commutator and the motor bearing interfaces as shown in Makita’s parts diagram (the assembly is listed as the rotor ass'y and includes the associated ball‑bearing items).
Designed for DUR190L / DUR190U and compatible DUR191L / DUR191U series trimmers, this original Makita rotor installs into the motor housing and restores the motor’s mechanical drive for reliable cutting performance.
Key specifics you’ll want to know before installing: overall length ~92 mm, commutator/pack (lamination) diameter ~19 mm, distance between bearings ~63 mm, typical bearing types used are 609Z (upper) and 695Z (lower).
This is a genuine Makita spare parts item meant to replace a worn armature/rotor in the trimmer motor — an economical fix that gets the cutting head turning again without swapping the whole tool. If you keep a parts inventory for maintenance, this original rotor is a common replacement in small Makita trimmers and is listed in official diagrams and distributor parts lists.
Compatible with Makita trimmer repair work and easy to source through Makita parts channels — a precise replacement part for those repairing their tools and working with parts for power tools.
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Compatible models this part will fit:
