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  1. #31
    Join Date
    Feb 2019
    Location
    Victoria
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    40

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    Thatís the packers pinned down
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  2. #32
    Join Date
    Sep 2008
    Location
    Riddells Creek, Vic.
    Posts
    807

    Default

    It would be much easier and cheaper to leave the original motor, pulley and belt in place and just fit a VFD.

  3. #33
    Join Date
    Feb 2019
    Location
    Victoria
    Posts
    40

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    Quote Originally Posted by Techo1 View Post
    It would be much easier and cheaper to leave the original motor, pulley and belt in place and just fit a VFD.

    Yes, but it would be pretty gutless as the original motor is only a 3.2 amp unit.

    The new one is 12.7 - so Iíll be able to lean on it pretty well.

  4. #34
    Join Date
    Sep 2008
    Location
    Riddells Creek, Vic.
    Posts
    807

    Default

    Current is directly related to Voltage, you can't compare a single phase 240 volt motor, to a 3 phase 400 volt motor, purely on the amperage draw on the nameplate..

  5. #35
    Join Date
    Feb 2012
    Location
    gippsland
    Posts
    20

    Default

    Quote Originally Posted by Techo1 View Post
    Current is directly related to Voltage, you can't compare a single phase 240 volt motor, to a 3 phase 400 volt motor, purely on the amperage draw on the nameplate..
    agree. comparing watts/kw will give you a closer picture, however you also have to consider a 3 phase motor has heaps more starting torque. single phase induction motors have a very poor starting winding. they are easy to stall can oscillate at startup under load, on rare occasions, and thats before we even get into trying to reverse it which is trivial on a 3 phase motor. and with a VSD you dont even have to buy a contactor set/thermal overload.

    i really shouldn't be saying this however because i live just down the road from the op and would love that little 3 phase motor ;-)

  6. #36
    Join Date
    May 2011
    Location
    Murray Bridge S Aust.
    Age
    71
    Posts
    5,661

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    Quote Originally Posted by SJ Lambert View Post
    As luck would have it, this lot has turned up with a note
    ĒJames We have located various items shown above which we understand are compatible with the Sheraton Lathe you are collecting tomorrow morning If of interest to you they can be bought for cash (receipt issued) ď
    Iíve countered with ďThanks, they look great - I had left a message as locating the accessories accompanying the lathe and they are obviously them - I donít think that it is fair to ask me for more money as they are part of the lathe itself as face plate, 2nd chuck, steady etc - are all part and parcel of the lathe itself - hopefully chuck keys can be located as well? ď
    I'd just read all the postings, and didn't see a comment about the extra bits. How did you get on with the auction place, did you get them, and how much extra did they want, or did they go in the scrap?
    Kryn
    To grow old is mandatory, growing up is optional.

  7. #37
    Join Date
    Feb 2019
    Location
    Victoria
    Posts
    40

    Default

    Quote Originally Posted by KBs PensNmore View Post
    I'd just read all the postings, and didn't see a comment about the extra bits. How did you get on with the auction place, did you get them, and how much extra did they want, or did they go in the scrap?
    Kryn

    Hi Kryn,

    Yes thanks, I did manage to rescue the extra bits without too much trouble!

    Iím now hatching a plan on how to recondition the worn out thread in the cross feed nut!
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  8. #38
    Join Date
    Feb 2019
    Location
    Victoria
    Posts
    40

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    Ironed out most of the bumps in the Gib strip
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  9. #39
    Join Date
    Feb 2019
    Location
    Victoria
    Posts
    40

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    Quote Originally Posted by SJ Lambert View Post
    Hi Kryn,

    …….

    I’m now hatching a plan on how to recondition the worn out thread in the cross feed nut!

    I don’t suppose there are any 5/8 x 10 LH Square Thread taps out there?

  10. #40
    Join Date
    Nov 2017
    Location
    Geelong, Australia
    Age
    57
    Posts
    2,490

    Default

    Quote Originally Posted by SJ Lambert View Post
    I donít suppose there are any 5/8 x 10 LH Square Thread taps out there?
    Is it definitely square?
    Thereís a trapezoid one on eBay

    https://www.ebay.com.au/itm/155729737388

    Steve

  11. #41
    Join Date
    Jul 2008
    Location
    near Warragul, Victoria
    Posts
    3,679

    Default thread

    Quote Originally Posted by SJ Lambert View Post
    Hi Kryn,

    Yes thanks, I did manage to rescue the extra bits without too much trouble!

    I’m now hatching a plan on how to recondition the worn out thread in the cross feed nut!
    It is a very common problem. The LH Acme thread cross feed screw will be worn as well as the nut. So you need to find a length of the correct size LH ACME thread and machine down one end to a short stub and you then cut of the old worn ACME thread and drill/bore out the original end part that has the handle on it and mate the two together.

    You can buy lengths of ACME LH screw in various sizes. I have repaired a few cross feeds , sometimes you have to machine up a new length of LH ACME screw thread if the right size isn't available.

    This write up describes the repair, the measurements are different for different brands of lathe


    https://www.wswells.com/crossfeed_sc...tructions.html

  12. #42
    Join Date
    Feb 2019
    Location
    Victoria
    Posts
    40

    Default

    Quote Originally Posted by OxxAndBert View Post
    Is it definitely square?
    Thereís a trapezoid one on eBay

    https://www.ebay.com.au/itm/155729737388

    Steve
    yep!
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  13. #43
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    35
    Posts
    1,514

    Default

    I would put very, very, very low odds on it being a square thread. I have pulled apart at least 20 lathes and I have never seen a square thread anywhere on any of them.

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