Face mill cutting angle

Face mill cutting angle

This topic has 5 replies, 4 voices, and was last updated 6 April 2022 at 17:58 by Martin Shaw 1.

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6 April 2022 at 14:18 #593208
Martin Shaw 1
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@martinshaw1
I have a SNMX 50mm 45deg face mill that uses RM8 inserts. This was recommended by Cutwel and very successful it is. I was looking for a smaller version of this, 32 or 40mm, and I was pointed at some 90 deg face mills. These undoubtedly work but I don't know what the practical difference between them is, can some enlighten me please?

Martin
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6 April 2022 at 14:18 #20664
Martin Shaw 1
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@martinshaw1
6 April 2022 at 14:45 #593211
Anonymous
The holder that uses inserts at 45 degrees can only machine surfaces that are open on all sides. The holder that uses inserts at 90 degrees can, in theory, machine a surface that has a shoulder on one, or more sides.

Andrew
6 April 2022 at 15:49 #593220
old mart
Participant
@oldmart
You can get 40mm shell mills that use four APMT or APHT 11or16 size inserts, they will require an arbor in your spindle fitting. They can cut to a 90 degree shoulder, but you have to allow for the radius in the corner. Your 45 degree face mill is very good for flat surfaces and is easier cutting because of the angled edges.
6 April 2022 at 16:10 #593225
JasonB
Moderator
@jasonb
Vertical and horizontal faces cut with the same 90deg Insert holder, APKT inserts as it was ali, APMT for steel or iron

Edited By JasonB on 06/04/2022 16:12:12
6 April 2022 at 17:58 #593243
Martin Shaw 1
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@martinshaw1
Thanks chaps, it's sort of obvious now you have pointed it out. I can proceed with an understanding of what I'm doing, always a help.

Martin
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