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  • dalee100
    replied
    Originally posted by mattthemuppet View Post
    I'm sure this is a typo, but just to clarify you meant CCMT09 right?

    The tip radius has something to do with DOC - smaller tip radii are for finishing as DOC is a function of tip radius, larger tip radii are for roughing. I've been happy with the middle one (-04 or .51, depending on nomenclature).
    Hi,

    As a general starting rule for finishing pass with carbide insets. Your final pass DOC should be equal to the nose radius of the insert. Then adjust up or down from there as needed to achieve your goal.

    A larger radius roughing insert can give as good or sometimes better finish than a small radius finishing insert. Just need to leave more meat for the finish. You quickly learn this when programing for CNC lathes. Extra tool changes for roughing to finish tools cost time and money. But this needs to be balanced against what the machine can actually do and requirements of the finished part.

    Dalee

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  • mattthemuppet
    replied
    for sure, no expectations there. As long as they cut well (and mine do at least) I don't really care whether they're genuine or not.

    Leave a comment:


  • MattiJ
    replied
    Originally posted by mattthemuppet View Post
    I've bought from these guys before
    http://www.ebay.com/itm/10pcs-Superi...UAAOSw8vZXMmmb

    no guarantee yours will be the same, but it's not a lot of money to find out
    Just don't expect to get anything genuine from zimi-hk or chinese ebay (insert) sellers in general.
    Fakes or not they IMO still offer good value for money. For example to compare no-name inserts here:
    http://www.ebay.de/itm/10-x-Wendepla...AAAOSwDk5UGBG-

    Leave a comment:


  • mattthemuppet
    replied
    I've bought from these guys before
    http://www.ebay.com/itm/10pcs-Superi...UAAOSw8vZXMmmb

    no guarantee yours will be the same, but it's not a lot of money to find out

    Leave a comment:


  • loose nut
    replied
    I ordered a SCLCR holder and CCMT inserts, $22 CND total. I was going to get some of the CCGT inserts to try out but they are out of them right now. Hopefully they will restock. I will see how the CCMT inserts work and maybe order the other in the future. Thanks for the help.

    Leave a comment:


  • MattiJ
    replied
    Matt, yes typo or brainfart on my side, haven't felt the sharpest for couple of days. Norovirus takes off the best edge of any man...

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  • mattthemuppet
    replied
    Originally posted by MattiJ View Post
    Yup, both ccgt09 and dcgt09 fit the same holder.
    I'm sure this is a typo, but just to clarify you meant CCMT09 right?

    for loose nut - xxGT inserts have a very sharp ground edge, with a bunch of top (back?) rake. They're originally for alu but i've found them to work well on steel - ymmv with your larger lathe. In my hands at least they give an awesome finish. xxMT have a molded edge, so are more robust but need more power/ rigidity than my lathe has to work properly - I'm sure they need more DOC and feed than I can give them, so I just use them for knocking rust off or interrupted cuts on steel. I'd get a pack of both inserts and double up on the holders.

    The tip radius has something to do with DOC - smaller tip radii are for finishing as DOC is a function of tip radius, larger tip radii are for roughing. I've been happy with the middle one (-04 or .51, depending on nomenclature).

    Leave a comment:


  • MattiJ
    replied
    Originally posted by loose nut View Post
    Thanks guys. I'm looking at the 16MM holders instead of the 12 MM ones, they may be a bit stiffer, maybe not enough to matter??? It's for a 13 x 40 lathe, BXA tool post, 16 MM should just fit.
    Most probably doesn't matter with sharp finishing inserts but why not. The extra cost is minimal.
    I have taken 1/2" off diameter(so 1/4" cut) on a 4130 with bit more robust ccmt09 inserts on a 12mm shank without apparent ill effects.

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  • loose nut
    replied
    Thanks guys. I'm looking at the 16MM holders instead of the 12 MM ones, they may be a bit stiffer, maybe not enough to matter??? It's for a 13 x 40 lathe, BXA tool post, 16 MM should just fit.
    Last edited by loose nut; 06-06-2017, 07:10 PM.

    Leave a comment:


  • dalee100
    replied
    Originally posted by danlb View Post
    I don't find an SCLSR tool holder. The SC tells us it will use a CCMT. 16 probably means the shaft is 1 inch square, The rest don't fit the ANSI chart.

    The inserts are 3/8 inch IC. so as long as your tool holder takes a CCMT32.51 you are golden..


    Dan
    Hi

    The 16 refers to the shank size of the tool - 16mm. I use the smaller 10-10, (10mm). Simply because I think it fits my post and holders better.

    Dalee

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  • loose nut
    replied
    TYPO, yes my bad.

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  • MattiJ
    replied
    Originally posted by loose nut View Post
    OK last question before I push the button,

    As far as I can tell by going through the info at Carbide Depot CCGT09T302 and CCMT09T304 should both fit the same holder, the difference is the tolerance and the tip radius but everything else, like the dimensions should be the same.

    Did I get that right?????? I am probably getting the SCLSR1616H09 holder which is suppose to take these inserts. Fingers crossed because reading the descriptions on the Bang Good site, in the usual Chinglish is painful.
    Yup, both ccgt09 and dcgt09 fit the same holder.
    And ...H09 on insert holder designation tells that its for 9(mm) size insert.
    SCLSR is probably your typo of SCLCR?

    Leave a comment:


  • danlb
    replied
    I don't find an SCLSR tool holder. The SC tells us it will use a CCMT. 16 probably means the shaft is 1 inch square, The rest don't fit the ANSI chart.

    The inserts are 3/8 inch IC. so as long as your tool holder takes a CCMT32.51 you are golden..


    Dan

    Leave a comment:


  • loose nut
    replied
    OK last question before I push the button,

    As far as I can tell by going through the info at Carbide Depot CCGT09T302 and CCMT09T304 should both fit the same holder, the difference is the tolerance and the tip radius but everything else, like the dimensions should be the same.

    Did I get that right?????? I am probably getting the SCLSR1616H09 holder which is suppose to take these inserts. Fingers crossed because reading the descriptions on the Bang Good site, in the usual Chinglish is painful.

    Leave a comment:


  • enginuity
    replied
    Originally posted by MattiJ View Post
    Niche? Maybe with home shop harry's but on the industry it has been mainstream for "forever" (since WW2?)
    Carbide insert tooling as we know it started becoming popular in the 1970s - about the same time as CNC was starting to become popular.

    Before the 1970s (being really general here) carbide was a specialty cutting tool similar to CBN is today. All those stories you hear from people saying carbide can't take interrupted cut? They were completely true and accurate. That was before the carbide revolution when fine grain carbide wasn't available nor were any of the coatings.

    Of course today fine grain coated carbide insert tooling is everywhere because it works well, and it is a "Gillette razor" type product. It's essentially a subscription based product. Wear it out and throw it away - or recycle it and buy it back from your supplier.

    Leave a comment:

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