04-16-2016, 08:30 AM
(04-15-2016, 08:05 PM)PixMan Wrote: Sounds like you want a 1" (or 25mm?) indexable insert end mill. In the Walter line, that would be an F4042 style. With Walter and most others, there will be 3 to 4 insert sizes, all being ADMT. APMT, XOMT (Seco) or similar. With almost all, the first two numerical characters of the insert nomenclature will give an indication of size (and inherent depth per pass capability. The smaller the insert, the more of them can fit around the periphery and the smoother it cuts. The larger the insert, the longer the cutting edge and deeper it can go in one pass.
Some basic guidelines for a typical 1" cutter:
16-18mm insert, 2 pockets
11-12mm insert, 2 or 3 pockets
9-10mm insert, 3- or 4 pockets
7-8mm insert, 4 or 5 pockets
I like the happy medium of a 3 insert cutter. When you look at the various offerings in your area, try to find photos of the cutter with inserts installed so you can see the axial shear angle and radial top rake angle.
This is my 3/4" F4042R with it's three 10mm inserts. In one photo you can see the significant axial shear angle, which help reduce cutting force.
In this view you can see the top rake angle, which also aids in reducing force and the hammering effect you'd get with the type seen in the "Lil' Hoggers."
Other makers may have little to no axial shear angle, though usually plenty of top rake angle. I hope this helps.
Hi there KEN
At the outset let me say thanks for the detailed response. We definitely would not have got better.
Looking up the Walter Catalogue we found the "Xtra-tec" F4042R Z25.025.Z03.10 TYPE AD 10T3 Cylindrical Shank Holder in a 25mm Shank and cut circumference.
However, we are a little concerned whether installing this in our R8 25 mm Holder would be preferable as we are rather inclined to the 20mm shank which will fit directly in a 20mm Colett closer up the Spindle Bore for better rigidity. Regretfully, there is no 20mm Shank with a 25mm Cutting Face in the book.
Also, do kindly confirm whether U would be happy with the ADMT10T308R-F56 in Grade WSM 35 Inserts for us as we would like to pursue acquiring Prices first thing Monday morn from our local Suppliers. We reiterate, fortunately we get good preferential Discounts via an old Friend and getting the right Toolholder with the correct Inserts will definitely set us up - for Life !!!
Could anybody ask for more !!!
Speaking for ourselves, we are indeed privileged to have Your esteemed knowledgeable and practical inputs here.
LORD BLESS
aRM