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  1. #16
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    Nov 2008
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    Perth WA
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    Hi Michael,

    If you were tempted by the convenience of carbide here are a few links to holders and inserts that I've found work quite effectively on my lathe.

    6PCS SET OF 12mm SHK LATHE INDEXABLE BORING BAR TURNING TOOL HOLDER DCMT CCMT | eBay
    10pcs CCGT09T304-AK H01 / CCGT3(2.5)1-AK H01 Used for Aluminum | eBay
    10pcs Korloy DCGT11T308-AK H01 DCG32.52-AK H01 Aluminum Inserts Free Shipping | eBay

    The inserts are high positive rake, intended for aluminium and work pretty well on low powered machines such as our Hercus lathes. The inserts perform reasonably well on tougher steels like 1045 and 4140 but they are fragile as are a lot of carbide grades.

    Bob.

  2. #17
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,228

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    I just purchased the set of tool holders Bob recommended. I made an offer of US$50 and it was automatically accepted instantly. So if anyone else wants to buy these, I suggest making an even lower offer. Start low and keep upping the bid until it's accepted. Let us know how you go!

  3. #18
    Join Date
    Nov 2008
    Location
    Perth WA
    Age
    71
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    Hi Chris,

    If you find the toolholders and inserts to be worthwhile, another holder that might prove useful is one that allows you to use the two often unused corners of the CCGT/CCMT inserts. The Bulgarian Kennametal holder illustrated cost me ninety dollars. Chinese versions didn't seem to exist or I didn't look hard enough. They do now - SCBCR1212H09 (12×100mm) External Lathe Turning Holder For CC**09T3** INSERT | eBay

    The inserts I have mounted in the both photos are Kennametal's CCGT09T304HP KC5025 Grade. They are more durable than the KORLOY inserts I suggested previously and work pretty well on hard-ish steel. The arbor I turned down was some particularly tough 1060. The down side of the Kennametal inserts is their cost. The local distributor charges $12 per insert. Joe H over in the general forum recommended the Korloys when I was chasing a more economical insert and they have proven to be a great recommendation.

    053 (Large).JPG 2 (Large).jpg

    Bob

  4. #19
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,228

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    Thanks Bob. Lovely finish on the arbor. If I'm understanding you correctly, the middle holder in the first pic utilises the normally unused corners of the insert? Can it be used for turning and facing like a "normal" holder or is the "unused" corner only suitable for certain cuts? It looks like you turned the arbor using the "normal" (<90 degree) corner of the insert.

    Cheers,
    Chris

  5. #20
    Join Date
    Jun 2007
    Location
    sydney ( st marys )
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    64
    Posts
    4,887

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    You can face and turn with them, but not to a square shoulder.

  6. #21
    Join Date
    Nov 2008
    Location
    Perth WA
    Age
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    Quote Originally Posted by pipeclay View Post
    You can face and turn with them, but not to a square shoulder.
    As Peter says...

    DSC_7582 (Large).JPG DSC_7587 (Large).JPG

  7. #22
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,228

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    Thanks gents. I shouldn't visit the Hercus Area forum. It seems to cost me money whenever I do.

  8. #23
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,228

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    My carbide tool-holders arrived during the week. They seem to be well made. Before I try them I've got a question. The two holders on the left and right in the photo are quite similar. Can anyone tell me what the difference is between them and what jobs each is more suited to?
    Attached Images Attached Images

  9. #24
    Join Date
    Jun 2007
    Location
    sydney ( st marys )
    Age
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    Posts
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    I can't tell you what you should be using them for without looking at a catalouge.

    The ccmt turning tool is fairly broad across the head so working with a centre you may not be able to go deep enough, the dcmt on the other hand can get in closer,you may find the dcmt better for a fine cut.

    This all depends on what sort of tip,work material etc.

    The other tools are boring bars,similar the ccmt would suit ruffing and the dcmt finishing.

    I use both types as well as quite a few other styles , it depends on what your doing.

    When you buy tips for these I would suggest not going bigger on the nose radius than .4.

  10. #25
    Join Date
    Nov 2007
    Location
    melbourne australia
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    OK, thanks for the info. I don't know what inserts they came with. I'll have a play with them tomorrow and see what sort of results I get on various materials.

  11. #26
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,228

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    Quote Originally Posted by pipeclay View Post
    you may find the dcmt better for a fine cut.
    I did.

    I tried all the tools on some 1020 MS, 4140 and 6061 ali. Reasonable finish on the 1020. Very nice finish on the 4140 and 6061. I think these are an excellent buy. Thanks to Bob for the heads-up.

  12. #27
    Join Date
    Nov 2008
    Location
    Perth WA
    Age
    71
    Posts
    6,458

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    Quote Originally Posted by Anorak Bob View Post
    Hi Michael,

    If you were tempted by the convenience of carbide here are a few links to holders and inserts that I've found work quite effectively on my lathe.

    6PCS SET OF 12mm SHK LATHE INDEXABLE BORING BAR TURNING TOOL HOLDER DCMT CCMT | eBay
    10pcs CCGT09T304-AK H01 / CCGT3(2.5)1-AK H01 Used for Aluminum | eBay
    10pcs Korloy DCGT11T308-AK H01 DCG32.52-AK H01 Aluminum Inserts Free Shipping | eBay

    The inserts are high positive rake, intended for aluminium and work pretty well on low powered machines such as our Hercus lathes. The inserts perform reasonably well on tougher steels like 1045 and 4140 but they are fragile as are a lot of carbide grades.

    Bob.

    Hello All,

    Chris sent me a PM regarding the mismatch of inserts and tool holders in my above reply. The set of tool holders suit the smallish ( and invariably cheaper ) DCMT 07.. and CCMT 06 .. inserts.



    I use the DCMT 07.. inserts and the link should have been this 10pcs KORLOY DCMT070204-HMP NC3020 Carbide Inserts New

    I do use CCMT 09.. inserts as linked above BUT the correct link for inserts suiting the featured set should be - 10pcs KORLOY CCMT060204-HMP CCMT21.51-HMP PC9030 Carbide insert | eBay

    My apologies to Chris and anyone else for the bum steer. There are numerous alternatives to the cheap Korloys I have suggested but I have found the Korloys to be pretty good value.

    Bob.

  13. #28
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,228

    Default

    No worries Bob- all sorted. I have purchased the four tool-holders you recommended in your PM, so now I'm good to go.

  14. #29
    Join Date
    Dec 2011
    Location
    Dunsborough WA
    Posts
    28

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    About 5 years ago I started to restore my Hercus Model A (details somewhere on this forum) for the last 5 years all that was waiting to get finished was the wiring to start and stop the lathe.
    I have now finished and got to power the lathe up last week, the lathe is running very nice, the HSS tool and HSS parting tools that I got and ground worked very good on some aluminium tubing and solid bar I had, thanks for all the ideas on the tooling, has got lots of chips flying around for little cost.

    Now to find time to play and learn

    Will look at other tooling options as I learn more.

    Again thanks for all the ideas.

    Michael

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