We will be closed for the Christmas and New Year holidays from Dec. 22nd, 2025, to Jan. 6th, 2026. Orders placed after December 17th, 2025 will be shipped starting January 12th, 2026.
Ronstan
S40 BB Block,Single
Single, universal head
Special Price
27.64€
was
28.49€
Available in stock
SKU
RF40100
FEATURES
- Low friction Acetal or Torlon® bearing system
- Lightweight
- Cheek cut-outs for easy bearing maintenance
- Captive Lock™ universal head
- Slotted pin shackle eliminates fouled lines
PRODUCT INFORMATION
Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required
APPLICATIONS
- Mainsheet
- Halyard
- Vang
- Spinnaker control lines on off-the-beach catamarans, one design classes and sportsboats up to 8m (26ft)
MATERIALS
- Acetal ball bearings
- UV stabilised Acetal sheave
- Grade 316 stainless steel load strap and head fitting
- Impact and UV resistant, fibre reinforced Nylon cheeks
Technical Data
| Sheave Ø | 40 mm |
|---|---|
| Max. Rope Ø | 10 mm |
| Max. Cable Ø | - mm |
| Pin Ø | 5.0 mm |
| M.W.L. | 350 kg |
| B. L. | 1000 kg |
| Weight | 70 g |