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RONSTANSeries 40 All-Purpose Blocks

RONSTAN

Series 40 All-Purpose Blocks

Much stronger than other same-size blocks and much more compact than other blocks handling the same loads. “Smart” features include a unique captive lock universal head fitting and an adjustable cam arm. The ball bearing blocks  feature Ronstan’s two-stage bearing system, which has exceptional low-friction performance and very high maximum working loads. Includes a unique ball bearing fiddle block. For dinghies and keelboats to 26'.

  • Sheave: UV stabilized acetal
  • Bearings: Two-stage acetal ball bearing system or plain bearing
  • Sheave Size: 1-9/16" (40mm)
  • Line Diameter: 7/16" max. (except fiddle blocks: 5/16" max.)
  • Cheek Material/Finish: Stainless and fiber-reinforced textured Zytel
  • Shackle/Strap Type: Universal head shackle. Either locks (0° or 90°) or swivels
Customer Reviews
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
All-Purpose Block, Single, 882lb. SWL, 2.5oz. 271754 RF41100
In stock online.

$24.79

All-Purpose Block, Single/Becket, 882lb. SWL, 2.8oz. 271747 RF41110
In stock online.

$29.99

All-Purpose Block, Single with Becket, Loop Head, 880lb. SWL, 2.2oz. 4563557 RF41111
In stock online.

$25.99

All-Purpose Block, Stand-Up, 882lb. SWL, 2.5oz. 271739 RF41140
In stock online.

$30.99

All-Purpose Block, Cheek, Single, 882lb. SWL, 2.3oz. 271721 RF41151
In stock online.

$29.99

All-Purpose Block, Double, 1,323lb. SWL, 4.8oz. 271697 RF41202
In stock online.

$46.99

All-Purpose Block, Double/Becket, 1,323lb. SWL, 5.0oz. 271689 RF41212
Ships when available.

$50.99

All-Purpose Block, Triple, 1,543lb. SWL, 6.9oz. 271671 RF41302
In stock online.

$69.99

All-Purpose Block, Triple with Becket, 2-Axis Head, 1,540lb. SWL, 7.4oz. 4563565 RF41312
In stock online.

$79.99

All-Purpose Block, Fiddle, 882lb. SWL, 3.2oz. 271663 RF41500
In stock online.

$42.99

All-Purpose Block, Fiddle/Becket/Cam, 882lb. SWL, 5.8oz. 271648 RF41530
Ships when available.

$93.99

Product Description

Much stronger than other same-size blocks and much more compact than other blocks handling the same loads. “Smart” features include a unique captive lock universal head fitting and an adjustable cam arm. The ball bearing blocks  feature Ronstan’s two-stage bearing system, which has exceptional low-friction performance and very high maximum working loads. Includes a unique ball bearing fiddle block. For dinghies and keelboats to 26'.

  • Sheave: UV stabilized acetal
  • Bearings: Two-stage acetal ball bearing system or plain bearing
  • Sheave Size: 1-9/16" (40mm)
  • Line Diameter: 7/16" max. (except fiddle blocks: 5/16" max.)
  • Cheek Material/Finish: Stainless and fiber-reinforced textured Zytel
  • Shackle/Strap Type: Universal head shackle. Either locks (0° or 90°) or swivels

Specs

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REVIEW SNAPSHOT®

by PowerReviews
RonstanSeries 40 All Purpose Blocks
 
4.8

(based on 4 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

75%

of respondents would recommend this to a friend.

Pros

  • Easy to install (3)

Cons

    Best Uses

    • Sailing (4)

    Reviewed by 4 customers

    Sort by

    Displaying reviews 1-4

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    (0 of 1 customers found this review helpful)

     
    5.0

    Suitable for the job

    By Fore"cast"

    from Kerr Lake, OK

    About Me Beginner

    Verified Buyer

    Pros

    • Easy To Install
    • Quality Construction

    Cons

      Best Uses

      • Sailing

      Comments about Series 40 All Purpose Blocks:

      Actually bought the wrong size, so can't comment at this time.

       
      5.0

      Great compact pulley

      By Chris

      from New Mexico

      About Me Beginner

      Verified Buyer

      Pros

      • Easy To Install
      • Easy To Use

      Cons

        Best Uses

        • Sailing
        • Small Boats

        Comments about Series 40 All Purpose Blocks:

        Convenient compact pulley for it's mwl.

         
        5.0

        Good gear

        By charlie

        from Terry, MT

        About Me Casual/ Recreational

        Verified Buyer

        Pros

        • Quality Construction

        Cons

        • None

        Best Uses

        • Sailing

        Comments about Series 40 All Purpose Blocks:

        Used for jjb halyard on small sailboat.

         
        4.0

        Good Value Item

        By Small Axe

        from Naramata, BC

        About Me Casual/ Recreational

        Verified Buyer

        Pros

        • Easy To Install
        • Easy To Use

        Cons

          Best Uses

          • Sailing
          • Small Boats

          Comments about Series 40 All Purpose Blocks:

          If you are a recreational sailor this product strikes the right balance between quality and price. I use several of them for control lines on my 25ft. Freedom.

          Displaying reviews 1-4

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          Questions about this Product?
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