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  1. #1
    Join Date
    Oct 2011
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    Burnie/ Adelaide
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    Default A gun related side line

    One of the fitters at work is a keen shooter. He knows that I have a mill with dividing head (which he doesn't) and asked whether I could make up a bolt handle for him. He's going to come back with a sketch and was talking about spiral milling...
    These are just some trial pieces based on some 'net pictures. They would need to be deburred/ blasted and painted if they were to be used but you get the idea (dimensions are around 40mm high and 25mm diameter). Apparently the real trick is putting a thread on the bolt. He can sort that bit.

    P1020824 (Medium).JPG

    Making these (where the cuts have to intersect in a regular fashion) has shown me that I have slight TIR and backlash issues on my dividing head. More things to fix!

    Michael

  2. #2
    Join Date
    May 2011
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    Murray Bridge S Aust.
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    66
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    3,248

    Default

    Nice work Michael.

  3. #3
    Join Date
    Aug 2008
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    near Rockhampton
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    5,580

    Default

    Nice, but I think you should make one like this...



    http://www.riflemax.com/images/bolt_..._boarder_2.jpg
    Light red, the colour of choice for the discerning man.

  4. #4
    Join Date
    Oct 2011
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    Default He got his spiral


  5. #5
    Join Date
    Jun 2011
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    Australia east coast
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    65
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    Default

    Quote Originally Posted by Michael G View Post
    Nice machining, but as an ex-shooter myself, I never had much time for people who did things like that to their firearms. Sort of like bolting bling onto a car......

    PDW

  6. #6
    Join Date
    Oct 2006
    Location
    Armidale NSW
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    864

    Default

    Quote Originally Posted by PDW View Post
    Nice machining, but as an ex-shooter myself, I never had much time for people who did things like that to their firearms. Sort of like bolting bling onto a car......
    I also prefer function over form, but I think that statement is a little harsh and quite generalistic.

    While I agree that changing a bolt handle is sometimes done for purely aesthetic reasons, it is also often done for ergonomic/functional reasons i.e. changing the shape to make the bolt more comfortable to use, accessible, or to help position it better in a different stock, or to keep it from hitting the scope when cycling a round. Hardly like bolt on bling.

    So if you are going to/need to change it, why not go for something that looks nice.
    Cheers.

    Vernon.
    __________________________________________________
    Bite off more than you can chew and then chew like crazy.

  7. #7
    Join Date
    Jul 2003
    Location
    Sydney
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    410

    Default

    I like it!
    _____________________________________
    "What you want in your life occasionally shows up...
    what you must have... always does."
    Doug Firebaugh

    Marc

  8. #8
    Join Date
    May 2011
    Location
    Salem Ohio
    Age
    59
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    219

    Cool

    Quote Originally Posted by Michael G View Post
    Apparently the real trick is putting a thread on the bolt. He can sort that bit.
    I do bolt threading with my lathe. I made a fixture that mounts in place of my lathes compound. I can swivel it a tad if the customer wants the knob angled back or kept straight. First I cut off the ball with a boring head that is mounted in my lathes spindle. Turned down it is now threaded with a hand die that is aligned with a fat live center in my lathe tailstock. I made some 1" dia brass knobs that everyone seems to like...Bob

  9. #9
    Join Date
    May 2011
    Location
    Salem Ohio
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    59
    Posts
    219

    Cool

    Found my pics online. I just got a new computer and all of my pics are on my old one...Bob
    Attached Images Attached Images

  10. #10
    Join Date
    Apr 2008
    Location
    NSW
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    Default

    Tactical bolt knobs have drawbacks. The increased length may make them easier to grab especially with gloves but it also causes extra sideways bolt binding . If the action to bolt fit is a bit sloppy and already prone to binding the longer knob makes it worse not better . You have to develop a pull straight back kind of bolt use not push across the centre line of the bolt . On a nice smooth Sako it works ok on a sloppy Mauser 98 not so good but you can develop the right pull back . If you watch some Military snipers using them they tend to hook a finger on the handle closer to the centre of the bolt after raising the bolt handle fully to pull back , this negates binding .
    The volume of a pizza of thickness 'a' and radius 'z' is given by pi z z a.

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