What hammer to hit drawbar? - Page 3
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  1. #41
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    Is the brake on, (sort of hard unless you have three arms) .
    Machine in low, high gear or neutral?
    Every B-port style needs a decent dead blow on hand to seat stock in the vise. It also works here.
    BTW every once in a while remove drawbar and lube or antisieze the threads. This gives a fair bit more pull for input torque.
    Lube can also be be put into the collet threads for sort of the same effect but this is SOP I would think. Problem is lube going down to the clamp surface if one gets too wild in application.
    Bob

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    Quote Originally Posted by jim rozen View Post
    Step one, buy new replacement spindle bearings for bridgeport. Step two, before installing them put them on the bench and beat on them with a hammer. Step three, continue hitting them once they're installed.
    If Otto the Hammerman used the machine, all bets are off. With Otto, everything was torque to yield,plus half a turn.

  3. #43
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    Quote Originally Posted by Edster View Post
    I've been using one of these forever. Works great!

    Hammer 955561 - MSC
    Same here for 20+ years until I sold my BPs. They worked great.

  4. #44
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    8b404bfc-a441-4846-897c-a461f2bbc1b7.jpg
    c3e5637b-936e-4337-9b6a-9e1e33dcfeb6.jpg
    I made a hammerwrench.

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  6. #45
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    Quote Originally Posted by Rlschow View Post
    8b404bfc-a441-4846-897c-a461f2bbc1b7.jpg
    c3e5637b-936e-4337-9b6a-9e1e33dcfeb6.jpg
    I made a hammerwrench.
    I made one of these as well, not quite as elegant as yours. Took a piece of brass bar, slotted the center wide enough to fit the wrench and bolted it on just as you did on yours. Works great.

  7. #46
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    Quote Originally Posted by jbacc View Post
    I made one of these as well, not quite as elegant as yours. Took a piece of brass bar, slotted the center wide enough to fit the wrench and bolted it on just as you did on yours. Works great.
    Necessity was the mother what you call "elegance". I had planned to use the scrap chunk of brass pretty much as found, but the hammer felt a bit heavy. I profiled it to lose weight...

  8. #47
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    Quote Originally Posted by Cyclotronguy View Post
    Back when I was an apprentice (old guy story) the better North American knee mills (Tree / Gorton & etc.) had shallow taper spindles, typically 9 BS tapers or larger. Suck one of those clean and dry up into a spindle and you'll be boring it out and sending the spindle out for a rebuild (and looking for a new job!)
    Gortons (the Mastermil line anyhow) have a ring on the drawbar that's captured by a hollow nut on top of the spindle. To pop the tool out you just back the drawbar up against the nut so it pushes down instead of pulling up.

    It's a little slower than a Bridgeport but might be nicer on the bearings.

  9. #48
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    I use a wrench/hammer of this type:
    Attached Thumbnails Attached Thumbnails drawbar-wrench.jpg  

  10. #49
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    Quote Originally Posted by MichaelP View Post
    I use a wrench/hammer of this type:
    The same thing I used for years. Hung on head rotation bolt when not in use.

  11. #50
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    Quote Originally Posted by moonlight machine View Post
    I just push the in / out button. There is no B-port accessory that will pay for itself faster than a Kurt power drawbar.
    Yes there is. An adapter that goes in your cordless drill for raising and lowering the knee is much preferred to my Kurt power drawbar.

  12. #51
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    OK everyone nobody kill me, but I just use the vise handle. Ya know the rectangular part that is a hinge. I give 1-1.5 turns to loosen the screw ( with the handle again) then give it a tap until the collet or holder breaks free and finish loosening. Been doing it that way the last 20 years. Now everyone tell me how I am killing my machine.

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  14. #52
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    I just tap it with the handle of the ratchet, which is always hanging right where I can find it. The nut on the drawbar is obviously made out of something harder than the rachet.

    That's about 20 years' worth of dings with intermittent hobbyist use.


    Sent from my Nokia 7.1 using Tapatalk

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