CMI 1" Arborist Block

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BREAKING STRENGTH302.48 kN (68,000 lb)

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


  • 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

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