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  1. #76
    Join Date
    Aug 2009
    Location
    Sydney, NSW, Australia
    Posts
    1,836

    Default

    I bought the ccmt 21 51 carbide tips the add didnt mention degrees, i plan on moving the shaft up and down with the motor assembly i havent worked that out yet but it will likely just be a threaded bar so long as the motor of choice isnt yo heavy

  2. #77
    Join Date
    Aug 2008
    Location
    Melbourne
    Age
    34
    Posts
    1,075

    Default

    Yeh...you gotta get a holder for the inserts.
    Make sure it's the right size to suit your toolpost if it's not adjustable. Tools only work properly if the height is correct

  3. #78
    Join Date
    Aug 2009
    Location
    Sydney, NSW, Australia
    Posts
    1,836

    Default

    Quote Originally Posted by elanjacobs View Post
    Yeh...you gotta get a holder for the inserts.
    Make sure it's the right size to suit your toolpost if it's not adjustable. Tools only work properly if the height is correct
    Its pretty hard finding 6mm tools so i had a blank tool i bought some time ago i was thinking of grinding the tip down the thickness of the carbide and brazing the carbide on

  4. #79
    Join Date
    Aug 2009
    Location
    Sydney, NSW, Australia
    Posts
    1,836

    Default

    Ran into a bit of a problem guys i picked up a mapp gas cylinder from bunnings and some silver solder paste as i already had a roll of 4mm thick silver solder and a propane torch, i removed a old tungsten tooth from a worn circular saw blade and brazed it onto one of my HSS 6mm tools first 2 brazes were poor as i have never brazed before

    3rd go worked a charm i put the tool in the.post and proceeded to cut the steel billet and the tooth had became so hot the solder had melted and released the carbide tooth

    Now im going down the route of brazing i think its not a good option i dont have anyway of cooling the tool i suppose i could hang a bottle of water on a slow drip feed but my lathe is small and i have 240v near the chuck i dont think its ideal

    I may have to make a screw on carbide fixture as there are next to no shops in Aus that deal with 6mm carbide tooling for some reason

  5. #80
    Join Date
    Mar 2011
    Location
    Southern Flinders Ranges
    Posts
    1,536

    Exclamation

    If you have a compressor you can feed low pressure air over the tool to cool it.

    Buy a 12mm tool and cut the bottom 6mm off.
    I have some 20mm Seco insert tools that I got from an estate that have had the bottom milled out, rather conveniently they are the correct size for my Hercus tool post.

  6. #81
    Join Date
    Aug 2009
    Location
    Sydney, NSW, Australia
    Posts
    1,836

    Default

    Racing now thats an idea, we are moving house and just got notified of another house available so it means i have to leave behind my 15amp outlet my compressor is 3 horse power bugger

  7. #82
    Join Date
    Sep 2008
    Location
    Riddells Creek, Vic.
    Posts
    831

    Default

    Are you using soft solder ( lead/tin), or proper silver solder?

  8. #83
    Join Date
    Aug 2009
    Location
    Sydney, NSW, Australia
    Posts
    1,836

    Default

    Hey Techno proper silver solder i bought it a few years ago in mistake for normal wire soldering

    I'll grab a set of the bigger carbide tools and cut them down i didnt even think of doing that

  9. #84
    Join Date
    Mar 2011
    Location
    Southern Flinders Ranges
    Posts
    1,536

    Default

    If it’s on a roll chances are it’s probably soft solder. Silver solder is usually in rods that have a label telling you the silver content. 2% and 5% are commonly used in plumbing/refrigeration pipe works. The higher the silver content, the more expensive the cost of the rod will be.

  10. #85
    Join Date
    Aug 2009
    Location
    Sydney, NSW, Australia
    Posts
    1,836

    Default

    Yeah its about 4mm thick on a roll the writting just said silver solder i'll grab the stiff rods and try that before i fork out for a 8mm kit thanks

  11. #86
    Join Date
    Nov 2008
    Location
    North Brisbane. Qld. Australia
    Age
    70
    Posts
    1,511

    Default

    SBA245 for brazing tips is what I would use. Expensive, but you can braze a lot of tips with one length of rod.
    Nev.

  12. #87
    Join Date
    Aug 2009
    Location
    Sydney, NSW, Australia
    Posts
    1,836

    Default

    Should i see if my bunnings has this SBA rod

    https://www.bunnings.com.au/consolid...stick_p5060118

    Or should u buy this 2 pack?

    https://www.bunnings.com.au/silver-b...s-2pk_p5910514

    Once i have this brazing sorted i should be on the right track this thread has been a bit messed up and gone cockeyed

    I will see if admin can remove this derailed thread i'll start another one for the purpous of a fresh build along

  13. #88
    Join Date
    Aug 2019
    Location
    Revesby - Sydney Australia
    Age
    56
    Posts
    1,183

    Default

    Quote Originally Posted by gazza2009au View Post
    Checked out hare and forbes the carbide tips were $50 i went with ebay $13

    While you are waiting for them to arrive, I can loan you some carbide. I have one 6mm square brazed, a 12mm holder which takes TCMT, and a few 16mm holders.

    Measure the slots in your tool post, and I'll deliver them to your letter box?

  14. #89
    Join Date
    Aug 2009
    Location
    Sydney, NSW, Australia
    Posts
    1,836

    Default

    Thanks Nigel for the offer my tool post is 6mm so your tools are too big, my lathe is only a 5x12" mini Hobbymat MD65

    my carbides should be here any time now and we are moving house so complicates things

  15. #90
    Join Date
    Aug 2009
    Location
    Sydney, NSW, Australia
    Posts
    1,836

    Default

    These are the carbides i bought https://www.ebay.com.au/itm/AU-10-CC...6-80ce49c9c245 does it matter that they are gold? I have seen the carbides for cutting hard steel are grey or black

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