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    Auto-Release Clamcleats

    Aluminum & Acetal

    This exciting new cleat will release a line when a set load is exceeded. It's perfect for a hold down for pivoting rudders and leeboards! The cleat flips up to release the rope when a set load is exceeded. The SD002570 is easily re-set or adjusted for different release loads, even out on the water.

    Click HERE for Installation Guide

    Click HERE for Details

    Click HERE for Instruction Leaflet

    After fitting the SD002570, (see fitting instructions below) start with the load adjustment cam set to Minimum. Increase the release load in small steps to avoid damage to equipment. Our tests show that release loads can be varied between 25kg & 240kg (50lb & 520lb). Note that smaller or worn ropes release at higher loads than larger or new ropes. Instructions are included with each SD002570.

    Technical Information

    sailboats, marine, dinghy, rope, holding cleats

    sailboats, marine, dinghy, rope, holding cleats
    sailboats, marine, dinghy, rope, holding cleats
    sailboats, marine, dinghy, rope, holding cleats
    sailboats, marine, dinghy, rope, holding cleats
    4-6mm
    3/16 - 1/4"
    Aluminium + Acetal
    A = 68 B = 36. C = 24mm
    A = 2 5/8" B = 1 13/32" C = 7/8"
    M4
    1/8"
    4.2mm
    No. 8
    31gm
    1.1oz

    Fitting Instructions

    Fits onto a flat or curved surface

    auto, release, cleat, transom, tiller, rudder, downhaul, rope

    Use sandpaper to achieve a perfect fit on a curved surface.

    auto, release, cleat, transom, tiller, rudder, downhaul, rope

    Mounting positions

    auto, release, cleat, transom, tiller, rudder, downhaul, rope
    Allow room for the cleat to operate
    auto, release, cleat, transom, tiller, rudder, downhaul, rope
    auto, release, cleat, transom, tiller, rudder, downhaul, rope
    can be mounted on any side of a tiller
    auto, release, cleat, transom, tiller, rudder, downhaul, rope
     
    When mounting in positions 2, 3 & 4 use an elastic band to hold the tail of the rope.
    auto, release, cleat, transom, tiller, rudder, downhaul, rope

    Rope alignment

    auto, release, cleat, transom, tiller, rudder, downhaul, rope
    To aid rope alignment
    use a fairlead

    auto, release, cleat, transom, tiller, rudder, downhaul, rope

    auto, release, cleat, transom, tiller, rudder, downhaul, rope

    Setting the release load

    auto, release, cleat, transom, tiller, rudder, downhaul, rope

    1. Test Release load with "cam" at "minimum setting".
    2. To increase release load use a screwdriver to rotate cam towards "maximum".

    WARNING - To avoid damaging equipment, make small adjustments and test each increase. Tests show that release loads of 240kg (530lbs) are possible with the cam at "maximum" setting.

    Smaller or worn ropes release at higher loads than larger or new ropes.

    Cam Replacement Kit

    • This kit is for anyone who has lost or damaged their original cam or screw.


    SD002570UG

     

    Feedback:

    From Dave Tolan - http://davesboat.blogspot.com/

    Be careful with installing this little device. The angle of the line to the device massively impacts the release force required.

    In the simple case of the cleat being flat on top of the centreboard, if the line angles up to the cleat the release load is significantly increased, if the line leads down to the cleat, it is significantly reduced.

    Also, as they note on the packet, thinner lines -> higher release load.

    It all makes sense if you draw out the forces acting on the pivot arm as vectors and resolve them into a force along the pivot arm, and a force perpendicular to the arm.

    Trial and error is required, don't simply install and assume it works. 

     

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