The Ronstan Series 25 Ball Bearing Orbit Block is a single sheave block engineered for high-performance dinghies and small boats up to 4 meters (13 ft.). This compact 25mm block features a 2-stage ball bearing system with high-compression acetal sheaves for smooth, efficient operation in demanding rigging applications.
Key Specifications:
- Sheave diameter: 1 in.
- Maximum rope diameter: 5/16 in.
- Maximum Working Load: 500 lb
- Breaking Load: 990 lb
- Weight: 0.6 oz
- Head type: Swivel shackle
- Becket type: Hollow stainless steel hub (accommodates up to 5/32 in. lashing)
Construction and Use:
- Frame and cheeks: Toughened, glass fiber reinforced nylon
- Sheave and balls: High compression strength acetal
- Ideal for mainsheet and spinnaker sheet turning, control lines, cascading vangs, and cunninghams
- Manufacturer Part Number: RF28100
Product facts
- CT SKU
- CT-117971
- UPC / GTIN
- 9316800661916
- Package weight
- 0.02 lb
Fit-sensitive item: confirm measurements, model numbers, and manufacturer details before ordering. Tug & Tow does not guarantee universal compatibility from a product page alone.
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Shipping & returns
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Fit & compatibility
Fit & compatibility
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Need help choosing?
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