Description
Ronstan Series 75 Ratchet Single Block – RF72100:
Features:
- Unrivalled 20:1 holding power.
- Dual sided On-Off switch.
- Ability to operate On/Off switch under load.
- Low friction ball bearing system.
- Lightweight.
- Cheek cut-outs for easy bearing maintenance.
The patented extruded hole design, in conjunction with the groove profile of the sheave, provides a more powerful grip than conventional designs – up to 20:1 holding power. Unrivalled low weight is achieved by the use of a Torlon® ratchet pawl, high grade machined alloy sheave and black Acetal hubs and bearings. On-Off switching knob is fitted to both sides of the swivel blocks (one can be removed if desired). Ratchet blocks can be disassembled for sheave replacement with RF62000.
Applications:
- Mainsheet on powerful dinghies and skiffs.
- Series 60 mainsheet systems on sports boats using RF7 mainsheet swivel units.
- Control line applications on larger yachts.
- Spinnaker sheets on sports boats and small keel boats (lateral lead blocks).
| Product No | Sheave Dia mm (in) | Max Rope Dia mm (in) | Max Working Load kg (lb) | Break Load kg (lb) | Weight g (oz) | Pin Dia mm (in) | Fasteners mm (in) |
|---|---|---|---|---|---|---|---|
| RF72100 | 75 (3) | 12 (1/2) | 420 (930) | 2000 (4410) | 162 (5.7) | 7 (9/32) | - |
| RF72174 | 75 (3) | 12 (1/2) | 420 (930) | 1370 (3020) | 270 (9.5) | - | 6 (1/4) |
| RF72175 | 75 (3) | 12 (1/2) | 420 (930) | 1370 (3020) | 405 (14.3) | - | 6 (1/4) |
