02-08-2016, 08:04 PM
Greg,
It's kind of hard to tell but I think you may need TNMG33x inserts for that boring bar, not 322. Those would be 3/16" thick instead of 1/8" thick.
While that's a common insert designation, the specific one I see there is special for boring bars as it give a high positive easy-cutting action in a bore and reduces chatter. The chipbreaker shape that Walter Valenite uses is available in left hand (for boring bars) or right hand (for O.D. turning) and they only have the chipbreaker is only on one side, making it a TNMM. You can use either thickness because your top clamp can reach and you can adjust height. If you get me the nomenclature off the bar I can tell for certain what insert should be in there. If, for example, it's a 1" bar the nomenclature might read "S16-MTONR 3". Insert thickness isn't part of that. Thickness is determined by the depth of the pocket and the total height of the carbide anvil and the cutting insert.
If you were shopping eBay or elsewhere for more of that style insert, look for TNMM332 (or 331)-EL-PN1 or EL-PN2. The difference is in just how deep and tight the chipbreaker shape might be. I can't tell which you may have, but either works as that one did and it's pretty cool, eh?
It's kind of hard to tell but I think you may need TNMG33x inserts for that boring bar, not 322. Those would be 3/16" thick instead of 1/8" thick.
While that's a common insert designation, the specific one I see there is special for boring bars as it give a high positive easy-cutting action in a bore and reduces chatter. The chipbreaker shape that Walter Valenite uses is available in left hand (for boring bars) or right hand (for O.D. turning) and they only have the chipbreaker is only on one side, making it a TNMM. You can use either thickness because your top clamp can reach and you can adjust height. If you get me the nomenclature off the bar I can tell for certain what insert should be in there. If, for example, it's a 1" bar the nomenclature might read "S16-MTONR 3". Insert thickness isn't part of that. Thickness is determined by the depth of the pocket and the total height of the carbide anvil and the cutting insert.
If you were shopping eBay or elsewhere for more of that style insert, look for TNMM332 (or 331)-EL-PN1 or EL-PN2. The difference is in just how deep and tight the chipbreaker shape might be. I can't tell which you may have, but either works as that one did and it's pretty cool, eh?