Ronstan Series 40 Ratchet Orbit Block, Auto, Swivel, 40 mm
- Brand:
- Ronstan
- Part no:
- RF46100
Image: Fisheries Supply
Where to buy
Specifications
- Sheave diameter
- 40 mm
- Bearing
- Ball
- Swivel
- Swivel
- Ratchet
- Auto
The Ronstan RF46100 is a Series 40 Orbit ratchet block with an automatic ratchet and a swivel head. The sheave is 40 mm across, made from hard anodized aluminum, and it runs on carbon black acetal ball bearings. Ronstan quotes up to 14:1 holding power for the Series 40 ratchet blocks. The maximum working load is 385 lb, and the maximum line size is 5/16 inch. On auto models the ratchet engages when load comes on.
Our take
With a 385 lb working load and a 5/16 inch line limit, this block is sized for thin sheets and moderate loads. The auto ratchet engages once load comes on, so it holds the sheet for you without a switch to set.
From our buying guide
Ball-bearing blocks give the lowest friction on lines running under moderate loads. Plain bearings have more friction, but handle very high and static loads.
Check before you buy:
- A ratchet block is rated for the full sheet load.
- Any becket's load limit suits the job, since a becket can be rated below the block itself.
- A soft-attach block will be looked after, since Harken warns soft attachments are prone to wear and recommends them only for regularly maintained race boats.