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Gallery, Projects and General => How do I?? => Topic started by: mattinker on November 08, 2017, 05:25:40 AM

Title: Carbide inserts.
Post by: mattinker on November 08, 2017, 05:25:40 AM
Does anyone have a link to a simple explanation about carbide inserts. So far I've used high speed steel, brazed carbide tooling and some insert tooling that turned up with the lathe, Recently I bought a second-hand boring bar which I think is an early Sandvick, but I can't find any references to it on the web!

Any help would be greatly appreciated! Cheers, Matthew
Title: Re: Carbide inserts.
Post by: RotarySMP on November 08, 2017, 07:36:28 AM
Carbide Depot has some useful info under there Technical rescources tab.
http://www.carbidedepot.com/formulas-bb-d.htm
Mark
Title: Re: Carbide inserts.
Post by: mattinker on November 08, 2017, 10:06:09 AM
Thanks Mark,
I've made some progress!!

So it's :-
A :- steel bar w/ coolant hole
25  ;- 1 5/6" °
T ;- 12" long
S :- Screw Lock only
V :-  35░diamond
U  :--3░  endcutting
B :- 5░  relief
R :- Right hand
16 :- 16mm?

I am assuming that the 16 is 16mm as the imperial units don't match.

Based on the table for inserts on the same site:-

The insert is a
V  35░diamond
B  5░ relief
Tolerance?
H Looks like a 70░ to 90░ Countersink
I don't understand the code for the length which looks like 16mm

Thanks again Mark, I'm getting somewhere!! Cheers, Matthew
Title: Re: Carbide inserts.
Post by: chipenter on November 08, 2017, 02:22:04 PM
16mm is the length of one side .
Title: Re: Carbide inserts.
Post by: snub on November 08, 2017, 03:09:32 PM
Here are some charts with imperial measurements, from KBC Tools.


.
Title: Re: Carbide inserts.
Post by: snub on November 08, 2017, 03:18:11 PM
If the pictures are too big you can view them at KBC Tools. Click on the E-Catalog, page 162.

https://www.kbctools.ca/
Title: Re: Carbide inserts.
Post by: mattinker on November 08, 2017, 03:28:16 PM
Here are some charts with imperial measurements, from KBC Tools.

16mm is the length of one side .

Thanks guys, I have now established that they are VBMT inserts.

Thanks again, I think I've made some progress as far as inserts are concerned! Cheers Matthew.