Ronstan S40 BB Orbit Block, Single, Bkt, Cleat, Swivel Head

Ronstan S40 BB Orbit Block, Single, Bkt, Cleat, Swivel Head

Regular price
$115.57
Sale price
$115.57
Regular price
$133.55
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FEATURES

  • Ultra Lightweight
  • Low friction 2-stage Orbital ball bearing system
  • Highest working load in its class
  • Low profile and compact
  • High performance cleating

Lightweight

Kilogram for kilogram of working load, BB and RT 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.   User Instructions
For comprehensive details including user instructions, and for spare part tables, and fastener sizes view in various languages using the following links BB & RT OrbitBlock™ User Instructions  (English),  BB & RT OrbitBlock™ User Instructions (French), BB & RT OrbitBlock™ User Instructions (German)

 

Sheave Ø 40 mm
Max. Rope Ø 9 mm
Max. Cable Ø mm
Pin Ø 4 mm
M.W.L. 325 kg
B. L. 650 kg
Weight 105 g
 

* Total block load.  Becket MWL 125kg, BL 250kg (550lb).  Suitable for 3:1 system at rated block load.