Large DMM Impact Block

Large DMM Impact Block
£281.50 Exc. VAT
£337.80 Inc. VAT
  • Description
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Designed for use when loads may be dropped into rigging with considerable impact forces.

The combination of high quality materials and advanced production processes has ensured a rope friendly, durable and robust product. During the design process, each Impact Block has gone through a thorough dynamic and static testing regime, the end result is a highly functional product with an impressive strength to weight ratio.


  • Rounded edges to the cheekplates maintain low rope abrasion when rope is fed ‘unfair’.
  • Fairlead flares help maintain high working efficiency.
  • Thrust surfaces increase tolerance to external loading of spindle and anchor pin.
  • The lightweight attachment sling facilitates hauling of the block, sling and rope to the climber and helps with handling, in-tree stowage and workshop storage.
  • Direct connection to cordage; the anchor sling helps ensure correct neighbour component compatibility.
  • High efficiency oilite bushings to reduce friction.
  • Colouring follows EU WLL protocol.
  • Individual serial marking.
  • Made in Wales, UK.

Technical specifications:

  • CE certification to European Machinery Directive 2005
  • Hot forged cheek plates in 6082-T6 aluminium for high strength to weight ratio
  • CNC machined from 6082-T6
  • Anodised to EN-12373-1:2001 Class I0EI Sealed for corrosion protection
  • Stainless Steel 303 hollow spindle (IMB-L only)
  • Stainless Steel 303 anchor pin (IMB-S), or 174 anchor pin (IMB-L)
  • Efficient and robust Bronze self lubricating oilite bushings
  • 6082-T6 aluminium alloy sheaves


  • Minimum breaking strength [MBS]: 300kN
  • Working Load Limit [WLL]: 60 kN
  • Maximum rope diameter: 20 mm
  • Weight: 3.47kg

Key Features


Brand: DMM

Product Code: limpactblock

Shipping Weight: 3.5kg.