Description
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Backstay tensioner blocks
Featuring laser-cut stainless steel side plates with precision turned brass sheaves. For use on twin or split backstays – for backstay wire of up to 10mm Ø .
Backstay tensioner system
A block and tackle system designed for use on split or twin backstays. Features stainless steel double block with brass sheaves, together with tensioning blocks from our series 2 range .
High load wire rope blocks
Available in fixed eye or swivel head. Cheeks are manufactured from 316 stainless steel and sheaves are precision turned from solid brass bar, running on a stainless steel centre bush.
Upright blocks
With heavy duty 316 stainless steel side plates. Sheaves are precision turned from solid aluminium bar, silver anodised and running on nylon bearings to reduce friction under load.
Upright block dimensions 91400 Base 38 x 45mm
Fastenings 5mm
91500 Base 51 x 55mm
Fastenings 6mm
Aluminium high load blocks
A range of high strength blocks designed for use with wire ropes or exceptionally rugged applications.
Cheeks are manufactured from marine grade aluminium, grey anodised for high UV-resistance and durability.
Sheaves are precision turned from solid aluminium bar, silver anodised and running on nylon bearings to reduce friction under load.
Reinforcing plates, rivets, shackles and straps are all from 316 stainless steel.
Cheek block dimensions 91650 Base 103 x 53mm
Fastenings 5mm
91750 Base 120 x 65mm
Fastenings 6mm
Brass sheave blocks
A simple lead block with turned brass sheave and stainless steel fixed eye strap.
| Sheave | Sheave Width | Rope ø | Wire ø | Break Load | SWL | Weight | |||
| Part No | ø (mm) | (mm) | (mm) | (mm) | (kg) | (kg) | (g) | ||
| Backstay tensioner | Backstay tensioner system | N02740 | 45 | 8 | 5 | 5 | 1300 | 650 | 163 |
| Backstay tensioner block | 91020 | 35 | 8 | – | 5 | – | – | 277 | |
| Backstay tensioner block | 91040 | 50 | 15 | – | 10 | – | – | 585 | |
| Brass Sheave Blocks | Single – fixed eye | 91200 | 35 | 8 | 4 | 4 | 400 | 200 | 67 |
| Single – fixed eye | 91300 | 45 | 8 | 5 | 5 | 750 | 375 | 106 | |
| High load wire rope blocks | Fixed eye | 91301 | 45 | 8 | 5 | 5 | 1300 | 650 | 163 |
| Swivel eye | 91302 | 45 | 8 | 5 | 5 | 1300 | 650 | 212 | |
| Upright blocks | Single – fixed eye | 91400 | 38 | 12 | 8 | 4 | – | – | 92 |
| Single – fixed eye | 91500 | 51 | 15 | 12 | 5 | – | – | 160 | |
| Aluminium blocks | Single – fixed eye | 91600 | 51 | 15 | 12 | 4 | 1750 | 875 | 155 |
| Single – fixed eye | 91700 | 63 | 18 | 16 | 5 | 3000 | 1500 | 248 | |
| Cheek | 91650 | 51 | 15 | 12 | 4 | – | – | 141 |
Important note:
Suggested boat sizes are given as a guidance only and assume a monohull with boom end sheeting, loaded vertically to the traveller.
Mid-boom sheeting, severely angled take offs and curved tracks can impose greater loads and suitable allowances should be made for this. If at all unsure of your choice it is important to seek further advice. If you are close to the maximum boat size suggested, we would advise upgrading to a Torlon package, long car or the next size up.
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