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Ronstan 60 mm Series 60 Core Mast Base Block

  • Single Mast Base Block with Clevis Pin Head
  • Maximum Line Size: 1/2", Pin Diameter: 5/16"
  • Maximum Working Load: 2200lbs, Breaking Load: 4410lbs
  • Item #: 
    603517
    Brand: 
    Ronstan
    Model #: 

    RF64108A

    Packaged Weight: 
    0.40 Lbs.
    List Price: 
    $82.34
    $69.99
    603517 Ronstan Ronstan 60 mm Series 60 Core Mast Base Block RF64108A

    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-off or tie-up point
    • Suits direct attachment to mainsail headboard for 2:1 halyard
    • Removable 8 mm (5/16") threaded pin at head
    • Acetal roller on head pin to suit spliced line attachment
    • Alloy Rope / Wire sheave version also available

    Specifications:

    • Safe working load: 2200 lb (1000 kg)
    • Breaking load: 4410 lb (2000 kg)
    • Weight: 6.4oz (182g)
    • Sheave diameter: 2-3/8" (60 mm)
    • Maximum line size: 1/2" (12 mm)

    Materials:

    • UV stabilized Acetal or anodized aluminum sheave (AW models)
    • aluminum alloy cheek plates
    • High compression strength carbon black Acetal ball bearings
    • 2205 stainless steel pin

    Applications:

    • Ideal for mainsheet, halyard and spinnaker sheet applications on boats to 12m (40ft)
    • Various control line applications on larger yachts
    • Alloy sheave models are available for use with wire

    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.

    Ronstan 60 mm Series 60 Core Mast Base Block
    55.61
     
    Status:  null In Stock

     
    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-off or tie-up point
    • Suits direct attachment to mainsail headboard for 2:1 halyard
    • Removable 8 mm (5/16") threaded pin at head
    • Acetal roller on head pin to suit spliced line attachment
    • Alloy Rope / Wire sheave version also available

    Specifications:

    • Safe working load: 2200 lb (1000 kg)
    • Breaking load: 4410 lb (2000 kg)
    • Weight: 6.4oz (182g)
    • Sheave diameter: 2-3/8" (60 mm)
    • Maximum line size: 1/2" (12 mm)

    Materials:

    • UV stabilized Acetal or anodized aluminum sheave (AW models)
    • aluminum alloy cheek plates
    • High compression strength carbon black Acetal ball bearings
    • 2205 stainless steel pin

    Applications:

    • Ideal for mainsheet, halyard and spinnaker sheet applications on boats to 12m (40ft)
    • Various control line applications on larger yachts
    • Alloy sheave models are available for use with wire

    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.

     





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    Ronstan 60 mm Series 60 Core Block
    Item #: 603513
  • Single Block with Swivel Head
  • Maximum Line Size: 1/2", Pin Diameter: 1/4"
  • Working Load: 2200 lbs, Breaking Load: 4410 lbs
  •  
    null
    List Price: $94.11
    MAP Price: $79.99

    Model #:
    RF64100
    Ronstan 60 mm Series 60 Core Block
    Item #: 603514
  • Single Block with Aluminum Wire Sheave and Clevis Pin Head
  • Maximum Line Size: 1/2", Maximum Wire: 3/16", Pin Diameter: 1/4"
  • Maximum Working Load: 2200 lbs, Breaking Load: 4410 lbs
  •  
    null
    List Price: $141.16
    MAP Price: $119.99

    Model #:
    RF64100AW
    Ronstan 60 mm Series 60 Core Block
    Item #: 603515
  • Single Block with Becket and Clevis Pin Head
  • Maximum Line Size: 1/2", Pin Diameter: 1/4"
  • Maximum Working Load: 2200 lbs, Breaking Load: 4410 lbs
  •  
    null
    List Price: $117.64
    MAP Price: $99.99

    Model #:
    RF64110
    Ronstan 60 mm Series 60 Core Halyard Block
    Item #: 603516
  • Single Halyard Block with Clevis Pin Head
  • Maximum Line Size: 1/2", Pin Diameter: 5/16"
  • Maximum Working Load: 2200 lbs, Breaking Load: 4410 lbs
  •  
    null
    List Price: $105.87
    MAP Price: $89.99

    Model #:
    RF64108
    Ronstan 60 mm Series 60 Core Block
    Item #: 603518
  • Single Wire Halyard Block with Aluminum Wire Sheave and Clevis Pin Head
  • Maximum Line Size: 1/2", Maximum Wire: 3/16", Pin Diameter: 1/4"
  • Maximum Working Load: 2200 lbs, Breaking Load: 4410 lbs
  •  
    null
    List Price: $188.22
    MAP Price: $159.99

    Model #:
    RF64108AW
    Ronstan 60 mm Series 60 Core Foot Block
    Item #: 603519
  • Single Foot Block
  • Maximum Line Size: 1/2",
  • Maximum Working Load: 2200 lbs, Breaking Load: 4410 lbs
  •  
    null
    List Price: $99.99
    MAP Price: $84.99

    Model #:
    RF64151
    Ronstan 60 mm Series 60 Core Double Block
    Item #: 603520
  • Double Block with Fixed Head
  • Maximum Line Size: 1/2",
  • Maximum Working Load: 2200 lbs, Breaking Load: 4410 lbs
  •  
    null
    List Price: $188.22
    MAP Price: $159.99

    Model #:
    RF64202
    Ronstan 60 mm Series 60 Core Stand-Up Block
    Item #: 603521
  • Single Stand-Up Block with Swivel Head
  • Maximum Line Size: 1/2"
  • Maximum Working Load: 2200 lbs, Breaking Load: 4410 lbs
  •  
    null
    List Price: $164.69
    MAP Price: $139.99

    Model #:
    RF64140
     
     
     

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