Barton Series 1 (30mm) Blocks

A strong, lightweight range of blocks for use on dinghies and dayboats or as lead blocks on larger craft.

Plain Bearing Blocks
Barton plain bearing blocks have a precision moulded acetal sheave running on a large diameter brass bearing, ensuring free running under the highest of loads.

Ball Bearing Blocks
With Barton’s unique super-low friction ball race systems, featuring acetal sheaves and delrin ball bearings, running on a large diameter centre boss. This allows Barton to fit more load-bearing balls, which ensure extremely low friction performance, even under high loads.

Available Heads and Shackles

Fixed Eye Clevis Pin
A simple, low priced fixed eye block with removable clevis pin for attachment. Pin Ø 5mm. Width between straps 13mm

Fixed Eye
With plain attachment eye

Swivel
Fully swivelling head with removable shackle

Becket
All the appropriate 30mm blocks are available with or without becket.

Specifications

• Sheave Size: 30mm x 12mm (1 3/16 x 7/16″)
• Max Rope Diameter: 8mm (5/16″)
• Safe Working Load: 355kg (782lbs)
• Break Load: 710kg (1565lbs)
• Max Rolling Load (Ball Bearing Blocks): 245kg (540lbs)

Break Loads
Where break and safe working loads are stated, it is assumed that all sheaves are evenly loaded as in a purchase tackle. Uneven loading, or loading of one sheave in a double or triple block, will severely affect strength quoted. If unsure, please seek further assistance.

Maximum rolling load on ball bearing blocks is the maximum free running load before ball bearings will distort.