• Ronstan Series 40 Ball Bearing Block - Single Upright Lead
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Ronstan

Ronstan Series 40 Ball Bearing Block - Single Upright Lead

Ronstan Series 40 Ball Bearing Block - Single Upright Lead

OM-RONSTAN-SERIES40BALL-RF40171

$56.90
$66.94 $56.90
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Overview

Bring halyards and other sail controls back to cleats or jammers with the Ronstan Series 40 Single Upright Lead Block. Its low-profile layout suits sailors routing lines at the mast base, with ball bearings helping the rope run with less friction.

Key features

  • Low-profile construction keeps the line-routing arrangement compact.
  • A ball-bearing sheave reduces friction as you work sail controls.
  • The two-stage bearing arrangement supports consistent operation across the load range.
  • A UV-stabilized acetal sheave provides UV protection for that component.

Specifications

  • Brand: Ronstan
  • Series: 40
  • Configuration: Single upright lead
  • Bearing system: Two-stage ball bearing
  • Ball bearing material: Acetal
  • Sheave material: UV-stabilized acetal
  • Load housing material: Grade 316 stainless steel

Good to know

Typical use is leading halyards at the mast base; the block can also route other rig sail controls toward cleats or jammers.

Specifications

BrandRonstan
Manufacturer part #RF40171
UPC9316800244249
Boxed dimensions4 x 3 x 1 in
Shipping weight0.1 lb

Shipping & returns

Free standard shipping

Standard shipping is free on every U.S. order — no minimum. Need it faster? Faster delivery options are available at checkout for qualifying orders. In-stock orders ship quickly with tracking; oversized and freight items may ship separately and can take a little longer. International rates are calculated at checkout.

30-day returns

Request a return within 30 days of delivery. Authorized returns are subject to a 15% restocking fee. Return shipping is paid by the buyer; items must be new and in original packaging. See our refund policy.

Genuine products

We source from authorized U.S. distributors. Every product is new, genuine and covered by the manufacturer warranty.

Genuine products

Genuine products, full warranty.

Fast, tracked shipping

On in-stock marine gear.

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