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  1. #1
    Join Date
    May 2020
    Location
    Willowbank QLD
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    345

    Default Installing a lathe

    Hello all

    I will be installing a lathe in my shed all up about 700Kg.
    I am wanting to gain a little height and spread the load on the concrete.
    The lathe comes with steel cabinets at each end.
    Am I asking for problems if I put a sheet of 18mm Form Ply under the cabinets on top of the concrete.
    Is this likely to cause accuracy problems down the track. The cabinets will be bolted through the Form Ply to the concrete.

    Thanks Steve

  2. #2
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    34
    Posts
    1,482

    Default

    With only 700kg you don't have any load problems to worry about spreading. I would just level it up and skip the wood. I do use 2x2s for height boosters on some machines but they are short and boxy and unlikely to twist.

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  3. #3
    Join Date
    Aug 2011
    Location
    Melbourne
    Posts
    4,776

    Default

    Hi Steve,

    For a 700Kg lathe, I would imagine that the bed could be easily twisted if sat on uneven ground or even a well made concrete slab. This may affect its ability to turn parallel. Placing it on some form ply will not help because being timber, it is compressible albeit by a small amount.

    A good basic project for your lathe is to turn up some screw jacks that have a decent steel pad to sit on the floor.

    They can be as simple as a piece of all thread (as big as you can go that fits through the holes in the base of your cabinet, 20mm or so) and welded to a steel pad. Steel pad can be around 60 - 70mm in diameter and maybe 10 - 12mm thick. Add a couple of adjustment nuts and your good to go. Adjust these pads until you have your lathe bed flat or your lathe turns parallel within spec.

    Simon

    Sent from a galaxy far far away
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

  4. #4
    BobL is offline Member: Blue and white apron brigade
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    Feb 2006
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    Perth
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    Default

    Can't see a problem if it bolted.

  5. #5
    Join Date
    Dec 2007
    Location
    Adelaide
    Posts
    465

    Default

    While timber does had some 'give' maybe form ply is up to the task, it is after all used to support concrete pours on multi story buildings, personally I would be opting for something out of steel - while you are at the design stage you may want to consider adding enough height to accommodate a duck board so you are not constantly stepping on any swarfe/chips that come off while turning - I have one that came from a butchers shop, though they are easy enough to make.
    R.jpg

  6. #6
    Join Date
    Jun 2005
    Location
    Townsville, Tropical Nth Qld.
    Posts
    217

    Default

    Quote Originally Posted by familyguy View Post
    While timber does had some 'give' maybe form ply is up to the task, it is after all used to support concrete pours on multi story buildings, personally I would be opting for something out of steel - while you are at the design stage you may want to consider adding enough height to accommodate a duck board so you are not constantly stepping on any swarfe/chips that come off while turning - I have one that came from a butchers shop, though they are easy enough to make.
    R.jpg
    I hate learning over machines no matter what type. I raised my 1 ton Nuttall 75mm and I couldn't live without my duckboard.
    Rgds,
    Crocy.

  7. #7
    Join Date
    Jun 2011
    Location
    Melbourne, Australia
    Posts
    37

    Default Installing a Lathe

    Whilst my lathe barely weighs half of the OP's, I too was concerned about uneven concrete and any resulting twisting forces on the lathe bed. Moreover, the concrete in my garage has shifted over time an it's anything but level. So I modified the cabinets to include height adjustment

    Legs are from 50x25 bar MIG welded to the cabinet undersides. Bolts are 3/4 UNF (much to my metric OCD's disgust because the 3/4 UNF tap was on hand and I wasn't able to readily source a similarly sized metric equivalent), generously chamfered on the ends. Feet are from 50mm round bar.

    I also managed to have my local paint supplier colour match the cabinet OEM paintwork and supply a couple of spray cans - a worthwhile move IMO if you want the modification to look like part of the original equipment.


    Salv
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