Makita 317259-5 — Bearing box / housing (housing without bearing). This original Makita replacement is the stamped/formed bearing housing that locates and supports the cutterhead/bearing assembly on the Makita 2012NB planer; it does not include the bearing itself and is sold as the housing unit only.

Why it matters: the 317259-5 bearing box holds the bearing in precise alignment with the cutterhead shaft, so replacing a cracked, worn or distorted housing restores concentricity, reduces vibration and wear, and gets the planer running smoothly again.

Compatibility: this part is listed specifically for the Makita 2012NB (304 mm / 12" planer) in Makita parts diagrams and parts catalogs — a direct, form-and-fit replacement for that model.

Practical details: part number 317259-5; described as “bearing box” or “housing w/o bearing”; packaged and shipped as a single housing unit ready to accept the correct bearing and fasteners during reassembly. If you’re ordering power tool parts for a quick repair, this piece is the exact housing you’ll need to restore the planer’s internal support.