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  1. #1
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    Default Backing plate material

    I need to make a new backing plate for a 4" 3 jaw chuck I acquired what would be the most suitable material to make it out of
    BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE

    Andre

  2. #2
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    Ueee is offline Blacksmith, Cabinetmaker, Machinist, Messmaker
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    Hi Andre,
    Some cast iron would be best, i think there is a Bohler at Uninnderra (spelling)? I have used a couple of different sized exercise weights brazed together to make one before, there is no supplier in Canberra who has cast iron, although i have found out that a place may be able to order it in cut to size. I hope they can!

    Good excuse to make a plug gauge too.
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

  3. #3
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    Thanks Ueee
    Another question Could anyone give me a rough guesstimate as to what a suitable piece of cast iron might cost.
    BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE

    Andre

  4. #4
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    Default scrap

    Andre you might try going around some of the clearance sales in your area , you might find an old trolley wheel or similar. Look in your local paper for sales ....when you find a chunk of iron .... you will be

  5. #5
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    Default Backing plate material

    Hi Andre
    Another great source is tractor weights. The ones that used to hang off the front. I could get you an old battery stamp from work. They are some seriously good quality SG cast iron but incredibly heavy to mail out.

    Phil

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    Ueee is offline Blacksmith, Cabinetmaker, Machinist, Messmaker
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    Quote Originally Posted by welder View Post
    Thanks Ueee
    Another question Could anyone give me a rough guesstimate as to what a suitable piece of cast iron might cost.
    I'm not sure on the cost, the 2 weights i got from kmart cost me $12 i think....

    Mike, have you gone mad with smileys, or have you just found all the fun ones????
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

  7. #7
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    Default a smile day

    Quote Originally Posted by Ueee View Post
    I'm not sure on the cost, the 2 weights i got from kmart cost me $12 i think....

    Mike, have you gone mad with smileys, or have you just found all the fun ones????


    hato you Ewan

  8. #8
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    Default Backing Plates

    Andre
    Good to hear from you again.
    You have been off the air for a while.
    Firstly, how is the Shaper scraping proceeding?
    I have photos here of the scraped head,I did some time back, & must put them up on the forum soon.
    Been having a bit of trouble transfering photos, to the forum sight.
    Getting back to the backing plates, do not do what I did.
    It took me ages to cut a blank out of an old Heine die set & machine it up internal screw cut etc. I mean a lot of work !
    Cant remember the lathe you have but there are a number of places that supply the cast piece ready for machining.
    Australian Metalworking Hobbyist is one. Try contacting Mal if the size is right I would go with that avenue.
    regards
    Bruce

  9. #9
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    Quote Originally Posted by welder View Post
    Thanks Ueee
    Another question Could anyone give me a rough guesstimate as to what a suitable piece of cast iron might cost.
    How thick does it have to be.

  10. #10
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    What about old disk brake hubs off cars? I'm pretty sure they are cast iron but im sure someone here would know. should be easy enough to pickup.

  11. #11
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    Doesn't have to be cast iron.

    I've machined up a couple of these from 50 and 70 mm thick steel boiler plate.

    Go to a heavy engineerig works and have a chat to them about off cuts.

    You can use the circular cut outs that they make when cutting round holes in steel plate for pipes to go through etc.

    They also have round stock off cuts from the ends.

    You pay normal new steel price but it works out pretty cheap - if you size it right - $20 or less.

    As this stuff is all flame and plasma cut you will have to grind off the hard slag before turning it.

    Rob

  12. #12
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    Quote Originally Posted by welder View Post
    Thanks Ueee
    Another question Could anyone give me a rough guesstimate as to what a suitable piece of cast iron might cost.
    Should be under $30, depends on what the cutting fee is..

    As for thickness what is it going onto?
    Gold, the colour of choice for the discerning person.

  13. #13
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    Ueee is offline Blacksmith, Cabinetmaker, Machinist, Messmaker
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    I just ordered a chunk for the verniers clamp, it works out at $5 a kilo plus gst and some freight.
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

  14. #14
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    I found a good source of cast iron disks is the belt rollers from old treadmills, the non motorised type.
    You can usually find heaps of them at your local tip shop and pick them up for around $5.00.
    I have found the cast iron to be better quality than old weights, especially the cheapo ones which tend to have lots of sand inculsions.
    Each treadmil will give you four nice disks that would be ideal for making backing plates for small chucks up to around 5".
    Cheers,
    Greg.

  15. #15
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    Quote Originally Posted by pipeclay View Post
    How thick does it have to be.
    40 mm
    BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE

    Andre

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