What Did You Buy Today?

682bear said:
An ebay find...

View attachment 410265

...an Enco boring/ facing head with a 1 inch straight arbor and an R8 arbor. It was listed 'for parts' because the seller didn't have any way to test it for function.

I took a chance on it... and it seems to be in good condition. Everything works very smoothly, and it advances 0.005" per revolution. I don't know if the advance is adjustable or not... I doubt it.

I've used the Criterion boring/ facing heads a good bit at work, they are not adjustable for the advance... I've also used a big one, I think it was a Wolhaupter, maybe 9" diameter... it was adjustable.

-Bear
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I have one of those, only the R8 shank though. Mine is in mint condition.
 
I scored this jewel at a estate sale,. $15 !!!!! Works perfect,, easy to use. I found the owner's book in a wooden box but no wheel facer. I went back to the sale and looked around for it, but no luck. So I went back to the shop and machined one out of a piece of 1 1/8" cold roll. The new diamond point was only $11.50, so I got only $26.50 in the whole machine. This thing is a breeze to operate. Also bought a brand new Snap-on metric snap and die set for $30 from the same estate sale. It lists for $300
 

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I have an import R8 fly cutter that houses 3/8” tools. I also have import 3/8” LH turning tool bits, as well as import 3/8” indexable shanks with imported carbide inserts, but…

I am making every effort to buy larger, higher quality tooling for my big mill, so I picked up the USA made 3/4” shank, 3” diameter indexable fly cutter found in these links (PN KT300-34):

Page 152 - Machine Shop Supplies

Page 152 - Machine Shop Supplies
www.missouricarbide.com

and

www.govets.com

3" Cutting Diam, 3/4" Shank Diam, TPG 32 Insert, Indexable Fly Cutter MPN:KT300-34

3" Cutting Diam, 3/4" Shank Diam, TPG 32 Insert, Indexable Fly Cutter
www.govets.com www.govets.com

ED46D361-E22B-4A48-A2A3-4ED72C73DD20.png

You will pay about 5 times as much for USA made, so I hope that it is worth it!

I won’t have money to buy inserts for a week. Does anybody want to recommend and/or link to quality TPG321 inserts for using this on mild steel? I am definitely one to make shallow cuts.

The item description had this:

06B1295E-518B-4DC3-A18F-96C8439AB42D.png

Edit: I see that the last digit there (i.e. 1,2, 3 or 6) is the corner radius in 64ths of an inch.

ED61025A-1E24-4CE1-B8F4-61036CE96CAE.png
 
Last edited:
extropic said:
@erikmannie

The last digit is the corner radius (in 64ths of an inch for ANSI inserts).

Carbidedepot.com has many useful charts in their Technical Information section.

Insert Designation Chart - provides ANSI and ISO designation code definitions for carbide insert shapes, relief angles, tolerances, chipbreaker codes, hole types, size values, thickness values, radius values, wiper lead angle, wiper clearance angle,

Carbide Insert Designation Chart
www.carbidedepot.com
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So if the corner radius on a carbide insert is .016”, what is the minimum DOC?

One nice thing about HSS is that you can dial in a tiny DOC.
 
erikmannie said:
So if the corner radius on a carbide insert is .016”, what is the minimum DOC?

One nice thing about HSS is that you can dial in a tiny DOC.
Click to expand...
The radius has nothing to do with DOC . ;) Where the radii does matter is on CNC lathes , and that's where cutter comp is used . Plug in the radius and the machine does all the computing instantly . :encourage:
 
extropic said:
62.3876 :grin:

Kidding aside, please restate your question.
Click to expand...
If you are using a carbide insert with a .016” radius, and you want to dial in as small of a DOC as possible, what is the smallest DOC that you can dial in?
 
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