03-14-2015, 09:33 PM
Ed,
If you looked close at the photo of the tool I got, sitting on top of the old Valenite catalog, you'd see that an SIR 500 M16 is the smallest one that takes the 16IR inserts, and it's minimum bore size is Ø .640". Note the "L2" max depth is 1.250", but that's easily lengthened by just turning it back a little more.
Honestly, I don't know if it's worth having one. Of the 4 or 5 internal threading bars I have, I've used maybe two, twice. Why don't you just let me send you one of mine to use for as long as you need it? And yes it will accept a 16IR-10ACME insert, which you can by singly from KBC tool for a fair price.
Before we go any further I have to look at the helix angle and whether or not it's possible. You say the minor diameter of the thread is .845", so what is the major diameter? Until you get to a 3/4" bar they don't have interchangeable anvils and may not be able to do a really coarse pitch thread. A 10TPI thread is right on the edge. I'm (slowly) downloading the Vardex "TTGen" software now to see what tools they recommend. If insert threading doesn't work, the software tells you better than charts in catalogs do.
If you looked close at the photo of the tool I got, sitting on top of the old Valenite catalog, you'd see that an SIR 500 M16 is the smallest one that takes the 16IR inserts, and it's minimum bore size is Ø .640". Note the "L2" max depth is 1.250", but that's easily lengthened by just turning it back a little more.
Honestly, I don't know if it's worth having one. Of the 4 or 5 internal threading bars I have, I've used maybe two, twice. Why don't you just let me send you one of mine to use for as long as you need it? And yes it will accept a 16IR-10ACME insert, which you can by singly from KBC tool for a fair price.
Before we go any further I have to look at the helix angle and whether or not it's possible. You say the minor diameter of the thread is .845", so what is the major diameter? Until you get to a 3/4" bar they don't have interchangeable anvils and may not be able to do a really coarse pitch thread. A 10TPI thread is right on the edge. I'm (slowly) downloading the Vardex "TTGen" software now to see what tools they recommend. If insert threading doesn't work, the software tells you better than charts in catalogs do.