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IndustryArena Forum > MetalWorking Machines > Hitachi Seikis > 1985 hitachi ht20 draw tube removal
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  1. #1
    Join Date
    Jan 2010
    Posts
    321

    1985 hitachi ht20 draw tube removal

    have just brought this lathe and many years ago somone has put a threaded alloy blanking bung in the drawtube for custom mounting there parts, so no bars can be put up the spindle.

    i need to take this out. the guy i brought it from thinks it is held in with a dowel pin or similiar

    so what is usually involved in removing the draw tube? i will obviously remove the chuck then i guess it is just removing the drawtube hyd cylinder and the drawtube will come out on the end of the cylinder?

  2. #2
    Join Date
    Mar 2006
    Posts
    31

    Re: 1985 hitachi ht20 draw tube removal

    Yes, but Ive had problems sliding it through before, because its gets built up with gunk near the chuck. Ive had to unbolt the cylinder, and slide it back a little. Theres a lock nut on the draw tube at the cylinder. Loosen that, and then youll be able to unscrew the draw tube from the cylinder. Then I pulled it forward and clean it, so it would slide trough easier. Its really not that difficult. The cylinder has a little weight to it though. I wouldnt want to do it without a helper.

  3. #3
    Join Date
    Jan 2010
    Posts
    321
    Quote Originally Posted by grumpy74 View Post
    Yes, but Ive had problems sliding it through before, because its gets built up with gunk near the chuck. Ive had to unbolt the cylinder, and slide it back a little. Theres a lock nut on the draw tube at the cylinder. Loosen that, and then youll be able to unscrew the draw tube from the cylinder. Then I pulled it forward and clean it, so it would slide trough easier. Its really not that difficult. The cylinder has a little weight to it though. I wouldnt want to do it without a helper.
    Thanks for the info worked out great

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