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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 mmlength mmmaximum line diameter mmmaximum working load kgshackle pin mm Weight g Price
A20401 Single With Swivel Head 780-83.38102404 54 £42.43
A20401-77 Single With A..77 Cleat 750-83.386804 120 £101.75
A20401B Single With Becket 780-99.88102404 58 £44.74
A20401B-77 Single With Becket And A..77 Cleat 780-99.886804 123 £104.05
A20401BF Single With Becket And Fiddle 780-126.88102404 73 £63.43
A20401BF-77 Single With Becket, Fiddle And A..77 Cleat 780-126.886804 139 £121.08
A20401BFH Single With Becket, Fiddle And Hook 540-15362404 92 £69.19
A20401BFH-77 Single With Becket, Fiddle, Hook And A..77 Cleat 540-1536804 171 £126.84
A20401C Single Cheek 78035.56210240- 34 £39.29
A20401CB Single Cheek With Becket 78062.5 X 14.67310240- 42 £41.59
A20401CHL High Load Single Cheek 78035.5062.0010360- 55 £60.17
A20401F Single With Fiddle 780-108.38102404 68 £56.33
A20401F-77 Single With Fiddle And A..77 Cleat 780-108.386804 134 £115.58
A20401FH Single With Fiddle And Hook 540-13462404 87 £62.09
A20401FH-77 Single With Fiddle, Hook And A..77 Cleat 540-1346804 153 £121.36
A20401H Single With Hook 540-10910250- 73 £48.18
A20401HL High Load Single 780-83.38103604 75 £65.41
A20401S Single With Ultra-Strap 700-64.5010240- 40 £37.28
A20401S-2030 40 & 30mm Linked Singles 780-1088140- 65 £56.06
A20401SLZ Single Stand Up 70036.257410240- 47 £42.97
A20401SR Single With Removable Ultra-Strap 700-6410240- 42 £41.50
A20401SRHL High Load Single With Removable Strap 700-64.5010360- 63 £62.39
A20402 Double 1150-93.55105005 102 £84.88
A20402B Double With Becket 1150-110.05105005 113 £87.18
A20403 Triple 1400-93.35107505 161 £127.31
A20403-77 Triple With A..77 Cleat 1400-93.3567505 239 £200.57
A20403B Triple With Becket 1400-110.05107505 165 £129.53
A20403B-77 Triple With Becket And A..77 Cleat 1400-110.5067505 242 £202.80
A20404 Quad 1400-95.05107505 213 £169.73
A2040Tii- Single Tii-On 800-5810180- 34.5 £37.28
A2040TiiHL Single Tii-On High Load 800-5810360- 40 £60.23
A2040XHL Extreme High Load 1500-548650- 71 £178.38
ATii-LOCK-40 Tii-Lock-40 ------ 2 £4.14