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Inserts for threading 16ER ISO and internal grooving inserts

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sparky961:
I couldn't say off hand what the price is. Usually if you have ti ask, don't bother looking at Sandvik.  :smart:

chipenter:
I have the same incerts from RDG and recenty cut a 8 tpi thread to a sholder , and the bump behind the the cutting edge cut the last thread when I droped the half nutts , and then had to wipp the slide out at the same time as the the half nutts , I will be grinding that off before using it next time , there is on line catalogs to help find incerts for your holders .

PekkaNF:
Thank you all

Seadog, I'll give APT a try, I'll need to oreder some GTN2 parting of inserts as well.

Sparky, thank you very much. I agree completely what you say.

This SECO appeals ti me because I have two different size internal grooving bars and that insert model is nice on that account that single holder can handle inser widths from 1-3 mm (nearly). Internal retaining ring width is 1,0 mm from 12 - 23 mm hole nominal sizes and then 1,2 mm wide from 25 mm and up. Therefore two holders and two inserts would cater my needs pretty well. Inserts are bit more wide.

I'll check eBay if I can find the two smallest sizes and maybe two widest and then I would be pretty much set for intenal grooving. If I can't find inserts, I'll need to buy smallest MGMN insetrs and bar type you posted.

Threading a separate issue, I'll try different brand insers (partial profile as sugested) and see if it does the trick.

Pekka

PekkaNF:
After few hours of googling, ebay, amazon etc. I managed to buy one pack of widest grooving inserts for this Seco bar...noticed that NA favors imperial designations and most of the times shipping is a killer....but found SECO Inserts (10 inserts) 9NR 103FG CP30...which means just the right one, but unfortunately they are coated, I prefer to grind noncoated.

Still trying to find few of the thinnest standard sizes, they actually might show up on reasonable price.

I have one american 60 degree threading shank and found 10 inserts for it. Looks like it is going to work on fine threads. Same 60 degree angle.

Pekka

PekkaNF:
Damn-it! I have been trying to buy 2,0 or 2,5 mm wide parting off inserts and on Sunday I bought set from ebay...got them today. They were 3,0 mm wide. I have read description wrong: SANDVIK Coromant N151.2-300-4E Tungsten carbide...Do they fit on standard GTN3 size blade or do they need special Sandvik blade?

They are also a bit wide for my puny lathe.

Hope the internal grooving inserts are of correct size.

Pekka

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