Makita 231225-7 — Compression Spring 16 (genuine Makita replacement)

Restore reliable belt tension and tracking with the original Makita compression spring (part no. 231225-7). This small but critical spring is made from hardened spring steel and installs in the belt-tension/tensioner assembly to provide the correct compression rate and return force so the sanding belt stays properly tensioned and tracks straight under load. It’s sold individually and is a direct replacement that matches the original form and function.

Common fitment (examples): Makita 9403, 9404, 9900B, 9901, 9902, 9903, 9924DB and related 76–100 mm belt sanders. The part is shown in the official parts exploded diagrams as the compression spring used with the tension roller/shoe assembly (often installed with screw M6x25 and flat washer 16 in that subassembly).

Why this part matters: a tired, bent or broken tension spring causes belt slip, wandering, premature belt wear and uneven sanding—replacing it restores correct tensioning, smooth starts and consistent sanding performance without changing other components.

What you’ll get: one genuine Makita 231225-7 compression spring, manufactured to match the original specifications and ready to drop into the tensioner assembly on the listed belt sander models.

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