![Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171] - Blocks](http://www.bergenperformancemarine.com/cdn/shop/files/ronstan-series-40-ball-bearing-block-single-upright-lead-rf40171-357.webp?v=1752226400&width=1946)
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Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171]
Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171]
Low stock! Only 9 left
Regular price
$55.79
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$55.79
Regular price
$65.63
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Series 40 Ball Bearing Block - Single Upright Lead
Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. Precision molded Acetal 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.
Applications:
- Typically used for halyards at the mast base.
Materials:
- Acetal ball bearings
- UV stabilized Acetal sheave
- Grade 316 stainless steel load housing
![Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171] - Blocks](http://www.bergenperformancemarine.com/cdn/shop/files/ronstan-series-40-ball-bearing-block-single-upright-lead-rf40171-357.webp?v=1752226400&width=1445)
![Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171] - Blocks](http://www.bergenperformancemarine.com/cdn/shop/files/ronstan-series-40-ball-bearing-block-single-upright-lead-rf40171-357.webp?v=1752226400&width=3840)
