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November 19, 2020 2 min read
Harken ratchet blocks start at a 40mm sheave size and run up to 75mm sheave size for use on a majority of dinghies and catamarans.
There are four types of Harken ratchet block:
All of these ratchet blocks come in slightly different forms.
The T2 soft attach ratchet blocks are popular because they are lightweight with the flexibility of being able to be lashed or spliced anywhere on the boat. The T2 only comes as a ratchamatic which is an automatic ratchet block. As soon as pressure it put onto the block from the attachment point the ratchet engages, when there is no pressure it releases and doesn't engage.
The carbo blocks are popular where the block isn't going to need to move, or where it will sit and happily do the job of making your sheeting easier. This is the standard block issued for a Laser mainsheet block for example, it sits in the middle of the deck with a spring underneath. Carbo blocks are attached using a shackle.
These are available with an on/off switch in the centre, or as an automatic ratchet which can be adjusted using the allen key provided with the block.
The power3 ratchets are the latest blocks from Harken.
Available as a carbo on/off, automatic carbo and T2 these blocks have two different sheave designs which are more aggressive and grip the rope to provide either 1.5x or 2x the grip you would get from a standard block.
You can see all of the ratchet blocks we sell at Sailing Chandlery using the link below. Make sure you have a look at the red versions to add a little bit of extra colour to your boat.
Explore the range of Harken Ratchet Blocks at Sailing Chandlery
If you have any questions about any of the blocks we sell at Sailing Chandlery then get in touch with our friendly team who are always happy to help.
Good product and excellent guidance from knowledgeable staff
Helpful service finding corre t its
Great service and products.
Great friendly service at keen prices
First time user. Glad l brought 4. Used smaller one than suggested.
Always fast delivery and a good selection of parts.
A good product efficiently dispatched
The definitive racing watch - my daughter is delighted. Hopefully it will be put to good use in the Uni sailing team. Great service as usual from Sailing Chandlery.
Just the job for mooring warps for my motor canoe. Pleasant to handle and plenty of elasticity. Delivery prompt. Very happy.
Very pleased - strong rowlock at a reasonable price. Prompt delivery.
Quality product. I have used these before, but have learned only recently that replacement O-rings are available. Definitely a bonus!
Delivery was prompt and the goods were well packaged. Very pleased.
Perfect shape for a complicated job and delivery and communications were excellent
The 750ml size is idea for longer outings, particularly in the warmer months. A good quality bottle.
Sturdy well-shaped brim, good stitching. All in all, very good value.
A very robust design with an easy to use valve and attachment ring. It also has a loop to tuck the valve away to stop it snagging on the shroud as it's hoisted which is a nice addition. Overall an excellent float.
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