جلبة ومفتاح، مخرطة صغيرة

The bushing fit perfectly on my lathe's gear shaft, and the key slid into place with just the right amount of snugness. The 8 mm inner diameter was spot-on for mounting the change gears I needed.

The 12mm OD bushing was exactly what I needed to mount my B change gear, and the machining is precise. The 16mm length fit perfectly into my setup without any extra filing.

The 12 mm OD bushing slid right onto my change gear shaft with zero slop, and the 3 mm key seated snugly in its slot. Machining is clean and true, so the gear train runs smooth without any wobble. Exactly what I needed to get my B and C gears meshing properly.