Durst 670 elevation column pinion gear
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Pinion gear for Durst M670 darkroom enlarger column lift, replaces worn/broken original nylon part.
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Replacement pinion gear for the Durst M670 enlarger's column elevation mechanism. This nylon/plastic pinion meshes with the toothed rack on the column to raise and lower the enlarger head via a rack-and-pinion drive.
The bore dimensions are modeled to be a tight, snug fit on the original steel shaft — this is intentional to avoid slop once installed. As a result, the hole may need to be slightly filed or reamed to fit properly; it's designed tight on purpose rather than loose, so a small amount of manual fitting is expected and normal.
A set screw hole is included to secure the gear to the shaft, matching the original mounting method.