Impact Block - Large



Handles massive drops for rigging and arborist work

The best choice for the working arborist, the DMM Impact Block has been beautifully designed to deliver the best performance in terms of alignment, resistance and appeal. The aesthetic curves of the DMM Impact Block combines beauty, strength and durability to ensure a rope-friendly surface. The Impact Block sets a new standard for handling massive drops. With a huge Minimum Breaking Strength of 300kN and a Working Load Limit of 60kN, it is incredibly strong and easily packable.


Brand Name:
Force Rating:
Minimum Breaking Strength (MBS) of 300kN and a Working Load Limit (WLL) of 60kN
Size (color):
Fits Rope Size & Type:
20mm max
7.65 lbs / 3.47 kg
225 x 120 x 97mm
Mfg Sku/Part Number:
Other Features:
Features & Benefits:
-- Rounded edges to cheekplates maintain low rope abrasion when rope is fed 'unfair'
-- Upper sheave opens via a threaded locking axle for added security
-- Thrust surfaces increase tolerance to external loading of spindle and anchor pin
-- Lightweight attachment sling facilitates hauling of block, sling and rope to the climber and helps with handling, in tree stowage and workshop storage
-- Direct connection to cordage, the anchor slings helps ensure correct neighbor component compatibility
-- High efficiency oilite bushings to reduce friction
-- Coloring follows EU WLL protocol
Tech Specs:
-- Conforms to EN12278:2007 NFPA 1983 (2012 Ed) Class G
-- CE certification to European Machinery Directive 2005
-- Hot forged cheek plates in aluminium for high strength to weight ratio
-- CNC machined from high grade aluminium
-- Anodized to BS EN ISO 7599:2010 class AA10 sealed for corrosion protection
-- Stainless Steel 303 hollow spindle [large only]
-- Corrosion resistant stainless steel anchor pin
-- Efficient and robust Bronze self lubricating oilite bushings
-- Aluminium alloy sheaves

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