"Hammer slap mod"??

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  • #1791
    dkowen
    Participant

    Several times I’ve read about this, but have yet to find the details.

    As near as I can gather, guys are putting a felt washer between the hammer and breech. How thick is it, and where do you get it?

    I gather it takes some of the hammer energy out, MV goes down. I assume you just dial up a little more spring to compensate.

    I’m thinking it might be the self adhesive pads you put under chair legs and the like?

    TIA

    Doug Owen

    #36297
    shadoh
    Participant

    It has been done many way. It can be done with any material that will reduce the noise of the two parts slamming into each other. You still want the transfer of energy though or you will lose power.

    Some have used Orings cut into the face of the breach. Tony does this I believe. Ive also seen several other versions as well. I used a thin, flat rubber washer between the two. I got rid of most of the higher pitched sounds of the hammer strike and only lost maybe 20 fps.

    #36298
    dkowen
    Participant

    Thanks for the information. If I follow you you’ve got a ‘rubber washer’ floating on the barrel between hammer and breech. The sort of rubber that you might cut from a bike innertube?

    Doug Owen

    #36301
    bodhisdad
    Participant

    DK yes that would work fine.

    #36304
    shadoh
    Participant

    Its not “floating”. Mine is attached to the breech with two tiny screws. I intended to try several different materials and then make a permenant one by gluing it to the breach face. You cant have it float because of the notch on the bottom that allows the hammer to re cock.

    #36318
    jfk
    Participant

    I put my breech in the lathe and turned a 1/16″ deep recess, 1/8″ wide in the back face of the breech and epoxied a 1/8″ diameter (material thickness) O ring. When it dried, I cut out the material that was blocking the notch. I’ve heard of others that cut an O ring in half and epoxied it to the face of the breech. I can’t remember if the idea was posted on here or the old TOG but it definately dampend the “slap” sound. I’m sure Tony does this mod if you don’t have the means to do it yourself. Happy Easter everyone.
    JFK

    #36323
    martin777
    Participant

    Couldn’t some of that “slap” be the breech smacking the top hat?

    #36327
    shadoh
    Participant

    It shouldnt be if your breech if pulled up tight against the top hat. It always should be or it will affect your fps.

    #36565
    walkonking
    Participant

    Does the hammer slap mod decrease the FPS due to dampening forces?

    #36571
    shadoh
    Participant

    Yeah, you lose a smidge, but not much. 15 to 20 fps, unless you squirt your whole tube of denture cream in there. That would be to much.

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