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  1. #1
    cookie48 is offline Old Fart (my step daughters named me)
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    Sep 2010
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    Mallala S.A.
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    Default Tail stock trouble.

    Gents, being new to this please be kind.
    I purchased a new lathe Metal master SM-920A.
    My problem is I can not get the tail stock to tighten.
    If I take it off and tighten underneath it will not slide back on to the bed. If I keep it loose enough to slide back on to the bed it does not tighten up enough in the middle of the bed.
    Is there a trick to it or have I got a lathe made on a Friday and the bed is not the same thickness along its length?
    You assistance is welcome.
    Cookie

  2. #2
    Dave J Guest

    Default

    I would say it's a Friday lathe and the bed underneath is not true to the top.
    Some guys convert theses lathes over to camlock to do away with the spanner.

    Dave

  3. #3
    Metmachmad is offline Turning useful pieces of steel into scrap metal.
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    Jun 2010
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    Riverina, NSW, Australia
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    Default

    Try tightening the adjusting nut with the tailstock on the bed. You might have to use a socket and extension bar with ratchet. Just keep nipping it up until you get the correct position of the tailstock locking lever.
    Turning useful pieces of steel into scrap metal.

  4. #4
    Join Date
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    Bendigo Victoria
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    Default

    Quote Originally Posted by Dave J View Post
    I would say it's a Friday lathe and the bed underneath is not true to the top.
    Some guys convert theses lathes over to camlock to do away with the spanner.

    Dave
    Dave, the Steelmaster SM920A is already a camlock lathe.

  5. #5
    Dave J Guest

    Default

    My mistake, I thought it wasn't cam lock.

    Lather, a spring under the tail stock on the bolt will keep it from grabbing.

    Dave

  6. #6
    cookie48 is offline Old Fart (my step daughters named me)
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    Mallala S.A.
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    Default

    The bolt under the tailstock is recessed and can not be tightened with a spanner, you have to turn the locking plate to do adjustments. What I am thinking might work is place a shim in the recess and expose the nut so it can be tightened. What will cause problems there is the cross members on the bed will get in the way a fair bit. Failing that who knows??

  7. #7
    Join Date
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    Default

    Have you measured along the length of the bed to determine how much variation there is?

  8. #8
    cookie48 is offline Old Fart (my step daughters named me)
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    Default

    All measurements taken and given to supplier. Still awaiting their reply. Maybe one day they will reply.

  9. #9
    Dave J Guest

    Default

    I measured my tailstock way for Lather and I have 0.05mm difference (which is nothing) end to end over the bed. My lathe is a 900 between centres Chinese lathe.

    Dave

  10. #10
    Join Date
    Aug 2011
    Location
    victoria
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    499

    Default

    Quote Originally Posted by cookie48 View Post
    Gents, being new to this please be kind.
    I purchased a new lathe Metal master SM-920A.
    My problem is I can not get the tail stock to tighten.
    If I take it off and tighten underneath it will not slide back on to the bed. If I keep it loose enough to slide back on to the bed it does not tighten up enough in the middle of the bed.
    Is there a trick to it or have I got a lathe made on a Friday and the bed is not the same thickness along its length?
    You assistance is welcome.
    Cookie
    the way I did it was to replace the bottom lock nut with a shorter one and using washer to disable the recess . insert the tailstock back to the bed and adjust for the right tension.
    hope this help
    Peter

  11. #11
    Dave J Guest

    Default

    If you have a mill or a milling attachment for the lathe, you could make up a new clamping plate.

    Dave

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