Harken Carbo 57mm Triple Ratchet Block with Swivel and Cam-Matic
- Brand:
- Harken
- Part no:
- 2140
Image: mauripro.com
Where to buy
View on Amazonpaid link
Specifications
- Sheave diameter
- 57 mm
- Sheaves
- 3
- Cam cleat
- Yes
- Swivel
- Swivel
- Manufacturer size
- Carbo 57mm
Manuals
- Online instructions (PDF)cdn.shopify.com
- Ratchet block user manual (HTML)www.manualsdir.com
This is a Harken Carbo ratchet block in the 57mm triple size, fitted with a swivel top and a 150 Cam-Matic cleat. It is finished in standard black. The ratchet and the Cam-Matic cleat together give high purchase and immediate line control, and the swivel adds maneuverability. The maker lists it as excellent for mainsheets or vangs.
Our take
With a 150 Cam-Matic cleat built into the 57mm triple ratchet block, the line is held right at the block, and the swivel top lets it turn with the lead. That fits the mainsheet and vang jobs the maker names.
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.

