Ronstan Series 55 BB Orbit BlocksRonstan

RONSTAN Orbit Blocks - Ball Bearing Size 55 - Overview


Lightweight. Kilogram for kilogram of working load, Ronstan Series 55 Ball Bearing Orbit Blocks™ are the world’s lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub. Weight and bulk are further reduced in the different block configurations. The ball bearing single and becket block has a through-sheave becket arrangement. The result? The lowest weight possible. Multi-sheave blocks have only single intermediate cheeks and an ultra-light and efficient head arrangement. This gives a 30% weight saving advantage over the nearest competitor. Other brands just link together their single blocks. This results in unnecessary double cheeks between each sheave, held together by a heavy steel channel across the top of the block.

Highest working load in its class. The orbital ball-bearing arrangement gives the largest possible bearing race diameter. This maximises load performance. The proven Ronstan 2-stage bearing system features high compression grade acetal ball bearings and a secondary full-contact bearing. This gives minimum friction across the full working load range.

The floating sheave and bearing system is supported by a fibre-reinforced load frame. The design was computer modelled to be stress optimised. The Dyneema® Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point.

Currency:
RONRF2455 - Ronstan Stand-up Base, S55 BB & RT Orbit Blocks
Code: RONRF2455
Original Price: $10.95
Price: $9.31
(You Save: $1.64)
RONRF50001 - Ronstan Retainer Clip, S55 BB&RT Orbit Singles Fiddles, 2-pack
Code: RONRF50001
Original Price: $3.95
Price: $3.36
(You Save: $0.59)
RONRF50002 - Ronstan Retainer Clip, S55 BB Orbit Doubles RT Triple, 2-pack
Code: RONRF50002
Original Price: $4.45
Price: $3.78
(You Save: $0.67)
RONRF50003 - Ronstan Retainer Clip, S55 BB Orbit Block Triples, 2-pack
Code: RONRF50003
Original Price: $4.45
Price: $3.78
(You Save: $0.67)
RONRF55110 - Ronstan Series 55 BB Orbit Block, Single Becket Swivel
Code: RONRF55110
Original Price: $46.95
Price: $39.91
(You Save: $7.04)
RONRF55151 - Ronstan Series 55 BB Orbit Block, Cheek
Code: RONRF55151
Original Price: $39.95
Price: $33.96
(You Save: $5.99)
RONRF55171 - Ronstan Series 55 BB Orbit Block, Upright Lead
Code: RONRF55171
Original Price: $55.95
Price: $47.56
(You Save: $8.39)
RONRF55210 - Ronstan Series 55 BB Orbit Block, Double Becket Swivel
Code: RONRF55210
Original Price: $97.95
Price: $83.26
(You Save: $14.69)
RONRF55310 - Ronstan Series 55 BB Orbit Block, Triple Becket Swivel
Code: RONRF55310
Original Price: $123.95
Price: $105.36
(You Save: $18.59)
RONRF55410 - Ronstan Series 55 BB Orbit Block, Quad Becket Swivel
Code: RONRF55410
Original Price: $199.95
Price: $169.96
(You Save: $29.99)
   

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