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Thread: Recomended Tooling for a Model A
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17th Jun 2017, 02:46 PM #16.
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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.
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21st Jun 2017, 09:45 AM #17Most Valued Member
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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!
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22nd Jun 2017, 05:23 PM #18.
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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
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22nd Jun 2017, 10:59 PM #19Most Valued Member
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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
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23rd Jun 2017, 10:02 AM #20Most Valued Member
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You can face and turn with them, but not to a square shoulder.
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23rd Jun 2017, 12:04 PM #21.
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As Peter says...
DSC_7582 (Large).JPG DSC_7587 (Large).JPG
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23rd Jun 2017, 12:15 PM #22Most Valued Member
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Thanks gents. I shouldn't visit the Hercus Area forum. It seems to cost me money whenever I do.
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8th Jul 2017, 05:01 PM #23Most Valued Member
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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?
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8th Jul 2017, 07:17 PM #24Most Valued Member
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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.
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9th Jul 2017, 12:23 AM #25Most Valued Member
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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.
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9th Jul 2017, 05:01 PM #26Most Valued Member
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9th Jul 2017, 08:53 PM #27.
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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.
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10th Jul 2017, 08:59 AM #28Most Valued Member
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No worries Bob- all sorted. I have purchased the four tool-holders you recommended in your PM, so now I'm good to go.
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5th Aug 2017, 12:22 AM #29Intermediate Member
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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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