Cutless bearing

ما هذا

A cutless (cutlass) bearing is a water-lubricated rubber bearing that supports the propeller shaft in a strut or stern tube.

Anchor

Shaft-drive Nordic boats often pair cutless bearings with stuffing boxes. Saildrives use different bearing architecture. FairHelm listens for shaft rumble under power and checks play when hauled.

FairHelm judgment

FairHelm judgment: excess shaft play at the bearing and scored shafts are haul-out items. Do not accept "runs fine" without hardstand feel if vibration shows in trial.

Limits

Clearance limits vary by shaft diameter and maker. We do not invent millimetre tables here. Use surveyor gauges for that shaft.

الأسئلة الشائعة

Q: Can I replace a cutless bearing afloat?
A: Usually no. Expect haul-out or lift for proper work.

Q: Is vibration always the cutless?
A: No. Prop damage, alignment, and engine mounts also vibrate.

Q: Do saildrives use cutless bearings the same way?
A: Architecture differs. Do not copy shaft advice blindly to saildrives.

بجانب

• Propeller shaft
• Stuffing box
• Saildrive
• Survey checklist
• Pre-purchase survey service