CMI 1" Arborist Block
A bigger arborist block at a better price! CMI's oversized aluminum block has a 1" rope capacity and manufacturer working load limit of 13,600 lb - over 6 tons. This 1" arborist block allows you to run your biggest ropes. This block is a big 9.25" x 6" yet weighs only 6.6 lb.
The upper sheave is retained when block opens, so there is no risk of losing it while installing your sling. You can fit up to a 1" sling for really big jobs. The lower sheave will give you a proper bend radius for 3/4" and larger rope (though it is a bit tight on 1".)
An impressive piece of tree rigging gear, made in the USA.
Features & Benefits
- 1" maximum rope capacity
- Impressive strength
- Anodized side plates
- Aluminum sheave
- Bushing
- Stainless axle
Specifications
- Manufacturer: CMI
- Break Strength: 68,000 lb
- WLL: 13,600 lb
- Maximum Rope Size: 25mm (1")
- Weight: 2.9 kg (6.5 lb)
- Height: 23.5 cm (9.25")
- Width: 15.25cm (6")
- Made in the USA
Ratings & Reviews
1 review
Excellent for 3/4" rope, 1" slings
by Niceguydave
I started testing on this new block from CMI about a month ago. I have been on the hunt for a 1" block for a while, not so much for being able to use a 1" rigging line, but to be able to put a proper sized sling in the block to build a good anchor.
This block weighs 6.4 pounds, not overly heavy. Finish is good - anodized aluminum. It is pretty much an updated Hobbs block.
Pros:
It will take a 1" Loopie sling
WLL of 13,600 pounds
MBS of 68,000 pounds
Cons: If 1" rope is used it will stick out past the cheeks - not good. Bend radius is a little too skinny IMO for 7/8” - 1” ropes.
Overall I like this block. It is an excellent rigging option for 3/4” lines and seems build to take the beating so often encountered in negative blocking.