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Range / Blocks / 40mm dynamic blocks

40mm Dynamic Blocks

Allen 40mm dynamic blocks are made from high-strength, lightweight glass-loaded nylon and feature dynamic bearings. The result is a high-performance block range suitable for keelboats and dinghies.


Dynamic Bearings - Twin rows of stainless steel ball bearings running on a stainless steel rail provide superior rolling speeds and durability when compared to plastic alternatives.


Swivel Shackle Attachment - Double, triple, and quadruple sheave variations all come with a lockable swivel shackle attachment. The shackle can be locked in 90-degree orientations. Alternatively, remove the shackle lock and allow the block to rotate freely.


Adjustable Cleat Arms - Single, double and triple sheave options are available with aluminium ball-bearing cam cleats mounted via an adjustable arm. The arm can be adjusted to suit your sheeting angle by simply loosening the nut and bolt through the centre of the block, loosening the side plates and retightening everything at the required angle.


Maximum Working Load - If exceeded the block may not perform as designed. Breaking Load - The load at which a major block failure is likely to occur.

Filters:

Accessories

  • Becket
  • Cam Cleat
  • Fiddle
  • Hook
  • Lacing Eye
  • None

Sheave Type

  • Dynamic
  • High Load
  • XHL

Block Configuration

  • Cheek
  • Double
  • Quad
  • Single
  • Triple
  • Clear All
SKU Title breaking load kgfixing hole centres mmmaximum line diameter mmmaximum working load kgshackle pin mm Length mm Weight g Price
A20401 Single With Swivel Head 780-102404 83.38 54 £42.43
A20401-77 Single With A..77 Cleat 750-6804 83.38 120 £101.75
A20401B Single With Becket 780-102404 99.88 58 £44.74
A20401B-77 Single With Becket And A..77 Cleat 780-6804 99.88 123 £104.05
A20401BF Single With Becket And Fiddle 780-102404 126.88 73 £63.43
A20401BF-77 Single With Becket, Fiddle And A..77 Cleat 780-6804 126.88 139 £121.08
A20401BFH Single With Becket, Fiddle And Hook 540-62404 153 92 £69.19
A20401BFH-77 Single With Becket, Fiddle, Hook And A..77 Cleat 540-6804 153 171 £126.84
A20401C Single Cheek 78035.510240- 62 34 £39.29
A20401CB Single Cheek With Becket 78062.5 X 14.610240- 73 42 £41.59
A20401CHL High Load Single Cheek 78035.5010360- 62 55 £60.17
A20401F Single With Fiddle 780-102404 108.38 68 £56.33
A20401F-77 Single With Fiddle And A..77 Cleat 780-6804 108.38 134 £115.58
A20401FH Single With Fiddle And Hook 540-62404 134 87 £62.09
A20401FH-77 Single With Fiddle, Hook And A..77 Cleat 540-6804 134 153 £121.36
A20401H Single With Hook 540-10250- 109 73 £48.18
A20401HL High Load Single 780-103604 83.38 75 £65.41
A20401S Single With Ultra-Strap 700-10240- 64.5 40 £37.28
A20401S-2030 40 & 30mm Linked Singles 780-8140- 108 65 £56.06
A20401SLZ Single Stand Up 70036.2510240- 74 47 £42.97
A20401SR Single With Removable Ultra-Strap 700-10240- 64 42 £41.50
A20401SRHL High Load Single With Removable Strap 700-10360- 64.5 63 £62.39
A20402 Double 1150-105005 93.55 102 £84.88
A20402B Double With Becket 1150-105005 110.05 113 £87.18
A20403 Triple 1400-107505 93.35 161 £127.31
A20403-77 Triple With A..77 Cleat 1400-67505 93.35 239 £200.57
A20403B Triple With Becket 1400-107505 110.05 165 £129.53
A20403B-77 Triple With Becket And A..77 Cleat 1400-67505 110.5 242 £202.80
A20404 Quad 1400-107505 95.05 213 £169.73
A2040Tii- Single Tii-On 800-10180- 58 34.5 £37.28
A2040TiiHL Single Tii-On High Load 800-10360- 58 40 £60.23
A2040XHL Extreme High Load 1500-8650- 54 71 £178.38
A2041 ** SALE ** Single With Swivel And 20mm Fiddle Block 800-101804 100 86 £50.64
ATii-LOCK-40 Tii-Lock-40 ----- - 2 £4.14