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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.
Loads of space in this bag for all of my kit, extra pockets are very helpful and the compartment inside keeps my dry and wet kit apart. Would recommend.
Not actually for a Topper but for a sailing canoe I have built. Pleased with the quality, delivered promptly, just the job thank you!
I’m using this with the Clamcleat CL211 and they pair perfectly. Strong and with the stiffness that I was looking for. Really pleased with the purchase and excellent quick service.
These work fantastically. Used with 6mm rope they grip instantly. Easy to adjust in small amounts and lock in with no effort at all. I was concerned that when the pressure comes off that the rope would release, but this isn’t the case at all. Really pleased with the purchase and rapid delivery.
Just what we needed, bought a second hand Topper, needed new ropes, sorted..Fitting instructions could be clearer for novices.
Very speedy delivery, and the special short length is just what I ordered. Ordering couldn’t have been simpler. Excellent service.
Harken block
Bought when I changed the wheels - arrived well wrapped with the wheels and on time. Easy to fit quality product. Good service
Easy to fit and seem to be robust as a replacement for my Trolley wheels. Arrived as promised very well wrapped. Worth checking if you need new washers and clips to add to your order.
Though not cheap this control line swivel block is just the job. Well worth the money imho.
Always can rely on sailing chandlery leading up to a busy event season ! Great service, great products all round !
Excellent, fair pricing, fast delivery! Would recommend
Slides easily through the blocks whilst providing firm grip
Item has brilliant bounce back ability, thanks
Simple to fit and makes launching and recovery simple. Well worth the investment
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