Makita 9557PBX1 4-1/2 in. Paddle Switch Cut-Off/Angle Grinder: problems, parts and running costs

Checked: 2026-10-18

Summary

The recurring weak point is the switch: on older small Makitas the switch or the plastic bar that activates it is what fails, usually well past the 1-year warranty. Running costs are consumable grinding wheels and cut-off blades plus an occasional carbon-brush set, and no yearly total is published. The kit is fair money up to about $130 and poor value above $160, where 11-13 A competitors with variable speed become reachable.

Common problems and fixes

Switch failure — the most reported weak point on this family: one owner’s rocker switch on an older 4 in Makita died after five years, and a fabricator reports that on small grinders the switch or its plastic actuator fails before the brushes; the 1-year/30-day warranty will not cover an old switch, so the fix is a Makita service repair under the published parts breakdown. [1][2][3]
7.5 A motor is light for the class — 11-13 A corded 4-1/2 in grinders (DeWalt DWE402, Makita GA5052) are common, so heavy removal work is slower; a limit, not a defect. [4][5][6]
No variable speed, electric brake or bind-up control — newer Makita grinders carry these and this model does not, which is what owners complain about when they outgrow it. [1][2]
Model mix-ups at purchase — the 9557PBX1 kit and the bare 9557PB are the same tool, the slide-switch 9557NB is a different product, and Makita’s own page once called the paddle switch “AC/DC slide switch” in copy; buy by the spec table, not the bullets. [2][8][9]
Cord length varies by listing — 6 ft per McCoy’s for the kit, 8 ft per Northern Tool and Acme Tools for the 9557PB; check the listing if it matters. [17][18][19]

Parts and consumables

4-1/2 in turbo diamond blade (A-94552) — one comes in the kit and wears with masonry, tile and stone work. [2]
Wheel guards (125273-5 grinding, 135103-2 cut-off) — both included in the kit; replacements are standard Makita parts. [2]
Lock nut (193465-4), lock-nut wrench (782422-3), side handle (153489-2), inner flange (224399-1) — kit hardware with standard Makita part numbers; replace when lost or damaged. [2]

Yearly running cost

No yearly total is published. Consumables dominate: grinding wheels and cut-off blades for the standard 5/8-11 spindle, plus an occasional carbon-brush set. There are no proprietary cartridges, subscriptions or other consumables, and electricity is a 7.5 A household-cord draw that stays small next to the wheels.

When it is a good buy

Retailer snapshots read 2026-10: the kit was $124.00 at Pacific Power Tools and Acme Tools, $124.99 at City Mill, $144.99 at Northern Tool and $149.95 at Global Industrial (Power Pack); the bare 9557PB was $69.95 at Delta Diamond and the slide-switch 9557NB $99.00 at MaxTool. [10][11][12][13][14][15][16] The kit’s premium over the bare tool runs about $25-55, roughly the value of the included wheels, diamond blade and case. Up to about $130 the kit is fair to good money if the accessories would be bought anyway; from $131-160 it turns weak to fair because 11-13 A competitors and variable-speed models become reachable; above $160 it is poor value for a 7.5 A tool with a 1-year warranty. [2][5] Alternatives: the bare 9557PB is the better choice when the case and wheels are not needed; the Makita GA5052 (11 A, listed at $129 in one comparison) is the better pick when more power matters; the DeWalt DWE402 is the heavy-duty pick in the same class; and Pro Tool Reviews names Metabo and Metabo HPT for corded 4-1/2 in work, where the 3-year warranty is the better choice when coverage length matters. [5][23][24][7]