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Ronstan 75 mm Series 75 Core Block (RF74100AW)

  • Single Block with Aluminum Wire Sheave with Clevis Pin Head
  • Maximum Line Size: 9/16"
  • Maximum Working Load: 3300 lbs
  • Item #: 
    603523
    Brand: 
    Ronstan
    Model #: 

    RF74100AW

    Packaged Weight: 
    0.80 Lbs.
    List Price: 
    $231.75
    $196.99
    603523 Ronstan Ronstan 75 mm Series 75 Core Block (RF74100AW) RF74100AW

    Core Blocks are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.

    Features:

    • Class leading performance and sleek, contemporary styling
    • Excellent dynamic and high static load performance
    • Less than half the friction of the nearest competitor
    • Durable aluminum alloy cheek plates
    • Central hub hole can be used as a becket take-of or tie-up point
    • Universal head with full 3-axis articulation
    • Head posts can be locked at 0 or 90 degress by using 2.5 mm Hex / Allen Key
    • Durable alloy Rope / Wire sheave

    Specifications:

    • Safe working load: 3300 lb (1500 kg)
    • Breaking load: 6600 lb (3000 kg)
    • Weight: 15.3oz (432g)
    • Sheave diameter: 3" (75 mm)
    • Maximum line size: 9/16" (14 mm)

    Applications:

    • Ideal for use on mainsheet, spinnaker sheet, vang, halyard and backstay applications on boats up to 14m (46ft)
    • General applications on larger yachts
    • Alloy sheave models are available for use with wire

    Materials:

    • UV stabilized acetal or anodized aluminum sheave (AW models)
    • aluminum alloy cheek plates
    • Grade 316 stainless steel shackle, post & hub

    Universal Bearing

    Dynamic and high static load performance

    The Ronstan Universal Bearing incorporates our proven 2-stage bearing system

    Stage 1 - Under moderate loads, Acetal ball bearings ensure minimum friction.

    Stage 2 - Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished stainless steel race takes over, maintaining low friction performance.

    Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks, preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn’t perfect. Particularly important for cheek blocks.

    Alloy cheek plates

    Block cheeks are manufactured from the highest quality alloy for maximum strength. Material optimization and the cut-away design minimizes weight and allows easy fresh water rinsing of salt and debris from the bearings. Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave, minimizing rope wear.


    Universal head

    The head assembly incorporates a brass bearing washer to provide smooth 360° rotation of the post and shackle. A set screw arrangement allows the head to be locked at 0° or 90°.

    Shackles are high quality forged grade 316 stainless steel.

    Acetal & aluminum sheave options

    Selected models are available with an aluminum sheave which has a deep groove profile specifically made for use with wire.

    Ronstan 75 mm Series 75 Core Block (RF74100AW)
    177.29
     
    Status:   null Call to confirm

     
    Shipping is delayed due to the high volume


    Core Blocks are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.

    Features:

    • Class leading performance and sleek, contemporary styling
    • Excellent dynamic and high static load performance
    • Less than half the friction of the nearest competitor
    • Durable aluminum alloy cheek plates
    • Central hub hole can be used as a becket take-of or tie-up point
    • Universal head with full 3-axis articulation
    • Head posts can be locked at 0 or 90 degress by using 2.5 mm Hex / Allen Key
    • Durable alloy Rope / Wire sheave

    Specifications:

    • Safe working load: 3300 lb (1500 kg)
    • Breaking load: 6600 lb (3000 kg)
    • Weight: 15.3oz (432g)
    • Sheave diameter: 3" (75 mm)
    • Maximum line size: 9/16" (14 mm)

    Applications:

    • Ideal for use on mainsheet, spinnaker sheet, vang, halyard and backstay applications on boats up to 14m (46ft)
    • General applications on larger yachts
    • Alloy sheave models are available for use with wire

    Materials:

    • UV stabilized acetal or anodized aluminum sheave (AW models)
    • aluminum alloy cheek plates
    • Grade 316 stainless steel shackle, post & hub

    Universal Bearing

    Dynamic and high static load performance

    The Ronstan Universal Bearing incorporates our proven 2-stage bearing system

    Stage 1 - Under moderate loads, Acetal ball bearings ensure minimum friction.

    Stage 2 - Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished stainless steel race takes over, maintaining low friction performance.

    Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks, preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn’t perfect. Particularly important for cheek blocks.

    Alloy cheek plates

    Block cheeks are manufactured from the highest quality alloy for maximum strength. Material optimization and the cut-away design minimizes weight and allows easy fresh water rinsing of salt and debris from the bearings. Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave, minimizing rope wear.


    Universal head

    The head assembly incorporates a brass bearing washer to provide smooth 360° rotation of the post and shackle. A set screw arrangement allows the head to be locked at 0° or 90°.

    Shackles are high quality forged grade 316 stainless steel.

    Acetal & aluminum sheave options

    Selected models are available with an aluminum sheave which has a deep groove profile specifically made for use with wire.

     





    secondary image
    Ronstan 75 mm Series 75 Core Block (RF74100)
    Item #: 603522
  • Single Block with Swivel
  • Maximum Line Size: 9/16"
  • Maximum Working Load: 3300 lbs
  •  
    null
    List Price: $128.22
    MAP Price: $108.99

    Model #:
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    Ronstan 75 mm Series 75 Core Block (RF74110)
    Item #: 603524
  • Single Block with Becket with Clevis Pin Head
  • Maximum Line Size: 9/16"
  • Maximum Working Load: 3300 lbs
  •  
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    List Price: $152.93
    MAP Price: $129.99

    Model #:
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    Ronstan 75 mm Series 75 Core Halyard Block
    Item #: 603525
  • Single Halyard Block with Clevis Pin Head
  • Maximum Line Size: 9/16"
  • Maximum Working Load: 3300 lbs
  •  
    null
    List Price: $121.16
    MAP Price: $102.99

    Model #:
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    Ronstan 75 mm Series 75 Core Mast Base Block
    Item #: 603526
  • Single Mast Base Block with Clevis Pin Head
  • Maximum Line Size: 9/16"
  • Maximum Working Load: 3300 lbs
  •  
    null
    List Price: $94.11
    MAP Price: $79.99

    Model #:
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    Ronstan 75 mm Series 75 Core Foot Block
    Item #: 603527
  • Single Foot Block
  • Maximum Line Size: 9/16"
  • Maximum Working Load: 3300 lbs
  •  
    null
    List Price: $141.16
    MAP Price: $119.99

    Model #:
    RF74151
    Ronstan 75 mm Series 75 Core Double Block
    Item #: 603528
  • Double Block with Fixed Head
  • Maximum Line Size: 9/16"
  • Maximum Working Load: 3300 lbs
  •  
    null
    List Price: $247.05
    MAP Price: $209.99

    Model #:
    RF74202
    Ronstan 75 mm Series 75 Core Stand-Up Block
    Item #: 603529
  • Single Stand-Up Block with Swivel Head
  • Maximum Line Size: 9/16"
  • Maximum Working Load: 3300 lbs
  •  
    null
    List Price: $241.16
    MAP Price: $204.99

    Model #:
    RF74140
     
     
     

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