Makita BO4556K: problems, parts and running costs

Checked: 2026-10-19

Summary

The only durability caution in the sources is an anecdotal “lower structure” remark from one video review; no recurring failure cluster was found. Running costs are limited to clamp-on abrasive sheets and dust bags, with no subscription. Value holds at about $89-96 and weakens above $120.

Common problems and fixes

Fixed 14,000 OPM, no speed control — the motor runs a fixed 14,000 OPM with no dial; you cannot slow it for delicate work, so technique and paper choice are the workaround. [1][4]
Clamp-style paper only — BO4556 uses 4-1/2" x 5-1/2" clamp-on sheets; the hook-and-loop sibling is the BO4555, so paper must be clamped correctly to avoid pad damage. [4][7]
Pad crack risk — the manual warns that cracks or breakage in the pad may cause injury and says never to run the tool without abrasive paper. [4]
Weight and vibration figures disagree — 2.4 vs 2.5 lb and 3.0, 3.5 and 4.0 m/s² across Makita pages; treat the figures as a range, not a single measurement. [1][2][4]
Repairs go to service centers — the manual directs carbon-brush inspection and replacement and all repairs to Makita Authorized Service Centers using Makita parts. [4]

Parts and consumables

Dust bag 166078-4 — empty at roughly half full; replace as needed. [1][4]
Pad / shoe base — replace if cracked; a cracked pad may cause injury. [4][5]
Armature, field, switch, fan, balancer, bearing box — listed in the published parts breakdown; service-center repair. [5]
Tool case — included in the K kit; replacement listed in the parts breakdown. [5]

Yearly running cost

Only 4-1/2" x 5-1/2" abrasive sheets and dust bags (166078-4) are consumables; there is no subscription and no battery. No annual quantity, per-sheet price or electricity rate is published, so a yearly dollar total cannot be computed.

When it is a good buy

At $89.00 or less (The Power Tool Store, checked 2026-10-19): strong budget value for a major-brand finishing sander with published parts. [6]
$91-100 (USA Tools lists $96.49, checked 2026-10-19): still good value if you want a simple fixed-speed 1/4-sheet sander. [7]
$101-120 (Smith Tool & Supply lists $117.13, checked 2026-10-19): fair; compare against variable-speed 1/4-sheet sanders before paying. [8]
Above $120: weak value for a fixed-speed sander with no measured independent test. [8]
Choose the BO4555 if you need hook-and-loop paper; compare other 1/4-sheet sanders with variable speed if you need speed control. [4]
Home Depot and Ace Tool list the bare BO4556 at $79.00 and Toolmarts at $84.00 (checked 2026-10-19) if you do not need the case. [9][10][11]