Slitting Saws?

[Bo’sunParticipant @bosun58570]

Good afternoon All,

A question for you knowledgeable folk.  I have a 2mm x 100mm x 130T slitting saw, purchased from an established supplier.

How much peripheral runout is considered acceptable?

I’ve checked it using a dial indicator with an “elephants foot” stylus and measured 0.55mm (TIR) runout.  This was replaced by another, (that I asked to be checked before despatch).  Using the same method, the replacement saw measured 0.35mm (TIR).

The slitting saw was mounted on a stub arbor with 0.03mm runout at the slitting saw position.

I welcome comments on my method of measurement.  I wasn’t sure how else to do it.

[JAParticipant @ja]

This subject has been discussed at great length twice this year.

Simply, eccentric running of slitting saws is the norm.

It would be nice if someone would gather the postings together, write something and send it to the ME. You may even get some money!

JA (being a bit of a killjoy)

[BazyleParticipant @bazyle]

That sounds terrible, 20 thou on a 4 in cutter. I would be looking for a thou or less on a new one. Must mearsure some of mine. When I hear it obviously not true I assume it is my arbor, collet, spindle.

[JasonBModerator @jasonb]

Although your arbor is 0.03 what is the fit of the saw like on the arbor? any slack

[Bo’sunParticipant @bosun58570]

Hello Jason,

The saws appear (to me) to fit the arbor just fine.  No discernible slack, and quite close to slide on.

[BazParticipant @baz89810]

If it were mine I would be sending it back and asking for a refund.

 

[Clive Brown 1Participant @clivebrown1]

With the radial runouts mentioned by the OP, only a few teeth will ever do any cutting.

[Bo’sunParticipant @bosun58570]

That’s correct Clive.  Initially looking at it by eye, it did appear to be running out somewhat.  So I tried a cut, and yes, it was by the sound of it, only cutting on a few teeth per revolution.

Why on earth did I pay for the other hundred or so teeth?

[JasonBModerator @jasonb]

Thay may come in useful once you have worn the first few down😉

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