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
S50 BB Block,Double
Double, universal head
Special Price
85.40€
was
88.04€
On Request
SKU
RF50200
FEATURES
- Low friction, 2-stage ball bearing system
- High static and dynamic load capacity
- Lightweight
- Cheek cut-outs for easy bearing maintenance
- Slotted pin shackle eliminates fouled lines
- Lockable swivelling head post
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.Head can be locked at 0° or 90° by engaging the grub screw in either the 0 or 90 degree position.
APPLICATIONS
- Mainsheet
- Spinnaker sheets
- Halyards and other primary applications on boats up to 10m (33ft)
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 | 50 mm |
|---|---|
| Max. Rope Ø | 12 mm |
| Max. Cable Ø | - mm |
| Pin Ø | 6.0 mm |
| M.W.L. | 800 kg |
| B. L. | 2000 kg |
| Weight | 254 g |
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