![Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171]](http://boatersemporium.com/cdn/shop/products/70615XL.jpg?v=1574652243&width=1000)
![Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171]](http://boatersemporium.com/cdn/shop/products/70615XL_1024x.jpg?v=1574652243)
Description
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
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