Blunt slitting saw

This topic has 6 replies, 3 voices, and was last updated 6 June 2016 at 09:28 by edintheclouds.

Viewing 7 posts - 1 through 7 (of 7 total)

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4 June 2016 at 20:45 #241439
edintheclouds
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@edintheclouds
Hi,

Was I expecting too much from a new slitting saw?

I've used a slitting saw for the first time today, it's 3" x 2mm x 64T, it was cutting BMS 3/4" deep x 1/2" thick running at about 800 – 950 RPM, lubricated with oil.

The saw has become blunt before the end of the cut, would a larger diameter saw have been a better bet?

Are there different grades of slitting saws available?

Many thanks for any advice.

Just uploaded photo of the set up.

Les

Edited By edintheclouds on 04/06/2016 20:52:30
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4 June 2016 at 20:45 #8151
edintheclouds
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@edintheclouds
Life of slitting saws
4 June 2016 at 20:48 #241440
JasonB
Moderator
@jasonb
They are best run a lot slower than that, would you turn 3" stock at that speed on the lathe?
4 June 2016 at 21:02 #241442
edintheclouds
Participant
@edintheclouds
Thanks Jason, we live and learn.

About 100 RPM?
5 June 2016 at 07:25 #241465
JasonB
Moderator
@jasonb
Yes.
6 June 2016 at 04:20 #241575
Hopper
Participant
@hopper
Cutting speed rule of thumb for HSS when cutting mild steel is:

400 divided by the diameter in inches.

So a 4" slitting saw would run at 400/4 = 100rpm.

A 2" job would run at 400/2 = 200 rpm.

So 3" should be good at 100rpm to be safe, or maybe up to 150rpm.

Double these speeds for brass or aluminium.
6 June 2016 at 09:28 #241590
edintheclouds
Participant
@edintheclouds
Thanks Hopper,

Your info is very useful, I will make a note for next time.
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Blunt slitting saw

Blunt slitting saw

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