Ronstan S40 BB Sheave
$36.99
Ronstan RF48000 Series 40 Ball Bearing Sheave
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- Specifications
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Description
40mm acetal sheave with captive ball bearings.
These high performance 40mm blocks feature Ronstan’s 2-stage bearing system and are engineered to achieve the highest possible strength-to-weight ratio. Ronstan Series 40 Orbit Blocks are a popular choice on mainsheet systems and spinnaker sheets for dinghies up to 5m (16′).
Featuring class leading strength, accommodating rope diameters up to 10mm, and available in 23 individual configurations, Ronstan’s new Series 40 Orbit Blocks are the most capable blocks of their size.
Features:
- Precision moulded acetal sheave running on ball bearings provides high performance & low friction
| Sheave diameter | 40mm |
| M.W.L. | 400kg |
| Max rope diameter | 10mm |
| Weight | 30g |
Note: to achieve the full MWL, it is essential the hub is adequately clamped between the two side plates to prevent rotation and opening up.

















