![Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171] - BuoyMart.com Blocks Ronstan](http://buoymart.com/cdn/shop/files/70615XL.jpg?v=1741406939&width=1000)
By Ronstan
Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171]
Regular price
$55.79 USD
Regular price
$65.63 USD
Sale price
$55.79 USD
Unit price
per
Shipping calculated at checkout.
Availability:
Low stock: 9 left
SKU:
70615
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![Ronstan Series 40 Ball Bearing Block - Single Upright Lead [RF40171] - BuoyMart.com Blocks Ronstan](http://buoymart.com/cdn/shop/files/70615XL.jpg?v=1741406939&width=150)
Regular price
$55.79 USD
Regular price
$65.63 USD
Sale price
$55.79 USD
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
