Ball Bearing


Series 50 Ball Bearing Block, Fiddle

Fiddle, universal head


Low friction, 2-stage ball bearing system.

High static and dynamic load capacity.


Cheek cut-outs for easy bearing maintenance

Captive Lock™ univers

Al head.

Slotted pin shackle eliminates fouled lines


Product Specifications
Pin Ø (in)3/16
Max. Rope diameter (in)3/8
M.W.L. (lb)1100
Sheave diameter (in)2 1/8 + 1 5/16
B.L. (lb)3310
Weight (oz)5.9

Product Information

Sheaves running on Acetal or Torlon® ball bearings provide high performance & low friction. The 2-stage ball bearing system provides consistent performance over the full load range.

Captive Lock™ universal head can be fixed in either of two planes, or free to swivel as required

Technical Information

Specification Details

Specification Details
A (in)5/16
B (in)11/32
C Max. (in)9 9/16
C Min (in)7 3/16
D (in)5/8
E (in)1/4


Typically used in direct 4:1 purchase systems such as mainsheets and boom vangs. On larger boats they are used for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers and traveller controls.



Acetal ball bearings. UV stabilised Acetal sheave. Grade 316 stainless steel load strap and head fitting. Impact and UV resistant, fibre reinforced Nylon cheeks


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