Product Range
Sheave Boxes
Allen sheave boxes, or exit blocks as they're also known, are designed to meet the demands of performance sailing, offering a choice of plain bearing or ball bearing sheaves to suit your specific application. To provide optimal durability and efficiency, we offer sheaves in a range of materials, including Acetal, stainless steel, and aluminium.Perfectly suited for halyard systems, control line systems, and general running rigging, Allen sheave boxes are built to handle a variety of applications on boats up to 30ft. Please note: Working and breaking loads depend on the installation method of the sheave box.
Filters:
Body Material
- Cast Aluminium
- Milled Aluminium
- Nylon
Sheave Diameter
- 20
- 25
- 30
- 36
- 38
- Clear All
| SKU | Title | Sheave Width mm | Sheave Diameter mm | Sheave Material | Slot Size mm | Fixing Hole Centres mm | Fixing Hole Diameter mm | Maximum Working Load Kg | Breaking Load Kg | Length mm | Line Diameter mm | Length mm | Weight g | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | A..15- | Low Profile Sheave Box - Small | 6 | 25 | Acetal / Stainless Steel | 38 x 10 | - | 4 | 300 | 750 | 54 | 3 - 5 | 53 | 12 | £15.72 |
 | A..16- | Low Profile Sheave Box - Medium | 6 | 38 | Acetal / Stainless Steel | 58 X 13 | - | 5 | 400 | 900 | 86.2 | 3 - 6 | 85 | 36 | £22.78 |
 | A...6- | Aluminium Sheave Box - Large | 8 | 38 | Acetal / Stainless Steel | 52 x 15 | 65 | 4 | 400 | 800 | 77 | 3 - 6 | 76 | 34 | £14.86 |
 | A...9- | Aluminium Sheave Box - Medium | 8 | 25 | Acetal | 44 x 13 | 57 | 4 | 300 | 670 | 69 | 3 - 6 | 66 | 21 | £11.17 |
 | A...8- | Nylon Sheave Box - Large | 12 | 38 | Acetal / Aluminium | 70 x 22 | 80 | 4 | 350 | 700 | 103 | 3 - 11 | 100 | 41 | £11.20 |
 | A..28 | Aluminium Sheave Box - Plain Bearing | 12 | 38 | Acetal | 70 x 22 | 87 | 6 | 350 | 700 | 110 | 100 | £37.45 | ||
 | A4409 | Stainless Steel Sheave Box - Plain Bearing | 12 | 38 | Stainless Steel | 77 x 19 | 90 | 6 | 300 | 600 | 200 | 98 | £35.87 | ||
 | A...4 | Aluminium Sheave Box - Plain Bearing | 8 | 26 | Acetal | 43 x 17 | 65 | 4 | 500 | 1000 | 76 | 26 | £11.53 | ||
 | A...5 | Aluminium Sheave Box - Plain Bearing | 6 | 36 | Acetal | 50 x 14 | 70 | 4 | 250 | 400 | 80 | 33 | £10.63 | ||
 | A...7 | Aluminium Double Sheave Box - Plain Bearing | 8 | 26 | Acetal | 42 x 27 | 65 | 4 | 250 | 500 | 76 | 48 | £18.85 | ||
 | A..94 | Nylon Mast Head Sheave Box - Plain Bearing | 6 | 36 | Acetal | - | - | To Fit 20mm Tube | - | - | 200 | 40 | £42.38 | ||
 | SA..94 | Adaptor For A..94 | - | - | - | - | - | To Fit 35mm Tube | - | - | 200 | 18 | £15.80 | ||
 | A4430-4716 | 30mm Exit Sheave Box | 10 | 30 | Acetal / Stainless Steel | 47 x 16 | 60 | 5.2 | 300 | 600 | 75 | 4 - 8 | 35 | £44.87 | |
 | A4420-4215 | 20mm Exit Sheave Box | 8 | 20 | Acetal / Stainless Steel | 42 x 15 | 62 | 5 | 250 | 500 | 77 | 3 - 6 | 29 | £41.68 | |
 | A4438-5415 | Wire Exit Sheave Box | 7 | 38 | Acetal / Stainless Steel | 54 x 15 | 72 | 5 | 600 | 900 | 86 | 4 - 7 | 0 | £52.12 | |
 | A4438-5818-12 | 38mm Exit Sheave Box | 10 | 38 | Acetal / Stainless Steel | 58 x 18 | 76 | 5 | 600 | 900 | 90 | 4 - 10 | 29 | £52.12 |
