Precision Crankshaft Clamp OS71530100 for RC Engines by O.S. Engine  [OS71530100]

Precision tool: crankshaft clamp

This is a purpose-built RC crankshaft clamp intended to secure the crankshaft during detailed engine work. It provides a steady reference point for jobs such as bearing checks, seal swaps, and careful timing adjustment. The description intentionally avoids asserting compatibility with particular engine models; treat it as a general clamp for matching shaft sizes.

Fitting the clamp is straightforward for experienced hobbyists: center the clamp on the crank snout, tighten evenly to prevent off-axis stress, and verify free rotation before final assembly. Use the right hand tools and conservative torque to protect mating components. During tuning it provides a consistent hold so repeat adjustments can be made reliably.

When replacing or stocking a spare, confirm the shaft diameter and nearby clearances on your engine. Refer to your engine documentation for any required tolerances. The clamp is supplied as a workshop support item, not a modification to engine structure.