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  1. #16
    Join Date
    Oct 2010
    Location
    melbourne, laverton
    Posts
    1,469

    Default well i found this

    ok i have brand new chuck a 3 jaw bison.
    its a little smaller than the others i have but i don't care because its brand new.
    i thought this blank was cast so i spark tested it and what a fluke.
    long yellow straws broken by star bursts.

    well its a start maybe buy some more later on.
    thanks for the tip
    ew

    wSAM_0885.jpg

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  3. #17
    Join Date
    Jan 2004
    Location
    Mackay Qld
    Posts
    3,466

    Default

    This bloke may have something.
    I have got a backing plate from him in the past.Not sure if what you want will be there but worth a look.

    Very good to deal with.

    Tools4cheap LLC Online Machine Shop Tooling Store: Lathe Tooling,Lathe Chucks ,Back Plates and Face Plates

    Grahame

  4. #18
    Join Date
    Jun 2011
    Location
    Australia east coast
    Age
    71
    Posts
    1,469

    Default

    I had a look at my spare casting collection over the w/end. The ones I had done for my old Smith-Drum lathe don't have enough metal to machine into an L-0 series back plate, so I can't offer you one. Means the pattern isn't suitable either.

    As for foundry costs, it's based on weight of material plus setup cost plus whatever else they want to charge. A one-off (or 2 or 4) is always going to be expensive on a per-unit price. Buy 100 and the unit price improves. This is why, if freight cost can be managed, I suggest you buy them. I could easily make them as I've got the vertical slotter needed but I don't do work for 3rd parties as I don't have the time. If you were closer I'd let you use my slotter under supervision but - you're not.

    Not sure what machining sequence I'd use. Probably rough machine & drill/bore to get rid of the bulk, set up again on the turned OD, finish bore again close to size, taper bore (or combine the 2), thread the OD then move to the slotter. Reason being, the slot is pretty loose in its requirements and doing it earlier gives you an interrupted cut on the internal boring operation.

    I've got a Colchester Chipmaster with D1-3 spindle and 3 other lathes, none of them L series. I do have an P-B L-00 collet chuck I'm going to butcher and fit to my Monarch CY one of these days.

    PDW

  5. #19
    Join Date
    Oct 2010
    Location
    melbourne, laverton
    Posts
    1,469

    Default thanks

    pdw thanks again for your offers and you incite regarding the lathe backing plates. very helpful.

    you see i have 1 backing plate now and i was thinking of trying to buy some of these that popoed up on the ebay
    thread.
    Faceplate Backing Plate Blank Metal Lathe Milling | eBay
    besides that i can still ring mick mollies and a few others.
    aaron

  6. #20
    Join Date
    Jun 2008
    Location
    Bairnsdale
    Age
    50
    Posts
    798

    Default

    Quote Originally Posted by azzrock View Post
    ok thats interesting just thought the key way would be chalange.
    not if i had a broach set
    castings from where?
    thanks aaron
    Do you have a shaper? If you do the keyway is the least of your worries.. If you
    get stuck I can lend you a broach, I have every size up to 1". And bushes to match.
    Although as stated above you would need to make a custom bush.

    Matt
    Warning Disclaimer

  7. #21
    Join Date
    Oct 2010
    Location
    melbourne, laverton
    Posts
    1,469

    Default backing plate

    hi matt thanks for the offer very kind of you. i was just ebaying broaches then.
    i may have to make bush to suit
    .i don't have a shaper.yet

    i was just running thru which order to do the cuts in.
    maybe hold the blank in a 3 jaw and bore out to minor dia.
    of the tapper.
    then reverse the plate and hold it internally with the 3 jaw
    machine the boss side down to size and cut the tread.
    take a small cut on the outer dia of the backing plate.
    reverse it again and then bore the tapper.
    cut the key.
    mount the plate on the spindle and face off ready to mount
    chuck.
    any way its been a while since ive had a multi steep job.
    shouldn't be hard its just a backing plate.
    aaron

  8. #22
    Join Date
    Oct 2010
    Location
    melbourne, laverton
    Posts
    1,469

    Default casr iron

    hi all i all ready knew there were different grades of cast iron but untill playing around recently
    with differant types of cast i had no idea just how differant they could be.
    can some one tell me please ideally wich grade of cast iron is suited to lathe backing plates?
    im guessing its the softer type.

  9. #23
    Join Date
    Jun 2007
    Location
    sydney
    Age
    64
    Posts
    3,566

    Default

    4 e

  10. #24
    Join Date
    Oct 2010
    Location
    melbourne, laverton
    Posts
    1,469

    Default 4e

    thanks pipe clay. ill just goggle that now to find out more
    aaron

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