04-11-2015, 04:08 PM
(04-09-2015, 02:40 PM)PixMan Wrote: For the inserts, consider the newest Walter grade WMP20S in the NF4 (finishing) and NM4 (medium-roughing) chipbreakers. The grade is the best "all around" grade I've ever seen and is good for steels, stainless steels and some exotics. Not as sharp as an uncoated polished one in aluminum, but it will work if you use heavier depth of cut and higher feed rates.Hello there KEN
I'm very curious about that "Keep In Low" thing, it sure doesn't make any sense.
And yes, a 3.3/2.2 Kw motor is 3HP. The 2.2 / .74 equals just about 3HP, the 3.3 / .74 is the 4.5HP 20 minute duty cycle for overtorquing it.
Well, we have already sent out our feelers on those Inserts and need to rectify some they wrongly referred to. Hopefully, we should know better on Monday week.
Knowing and recalling on our Manual, we know there's typically not much there on instructions or actual usage of our Lathe. We checked with the Suppliers and the Guy did confirm that the 'Keep in Low' Lever was an "additional safety feature for threading" whilst working in the low Gears, and that we could use the HIGH option for normal turning if we so desired. Well, we had a good chance today to continue with our project and did experiment with that Lever specifically. Confidentially, we really thought and literally expected that, Man we gonna see real action with boosted 'HIGH Fast & Furious Speed' now from our machine using that Lever in the High position. Heck, what a drab disappointment. We found out that the Lever in High only permits a HIGH FEED Ratio whilst normal turning, which for our desired finishes, is generally not good at all. As U would guess, we resorted to the old LOW engagement and merrily continued with our work with the well expected results.
Maybe, just maybe, there's scope for its application in that it would be good for softer metals like NFM's Aluminium etc. where faster Feed Rates on fine cuts would result in extremely nice finishes. We'd really like to experiment and give that a shot some time. There are good possibilities there of which U would know better.
So that terminates the KEEP IN LOW saga and we must sincerely thank U Guys for giving us an opportunity to bring this to the surface to clear any and all misgivings, not to mention the positive pointers in picking the right inserts for our turning.
Much appreciated KEN.
aRM