RE: [CAD_CAM_EDM_DRO] Re: Speed of Tapping Head?

Hi John,

Thanks for the information, it's solved a few of my problems. I guess when
you think about it, there's no reason why tapping can't be done at speed.

I think the size of the motor and reduction gearbox will end up determining
the max speed.

Cheers,

Peter Homann
<mailto:peter.homann@...>
Work : +61 3 8530-7755
Adacel Technologies Ltd Fax : +61 3 9596-2960
250 Bay St, Brighton 3186, VIC, AUSTRALIA Mobile : 0421 601665
http://www.adacel.com.au Australian Software Engineering Excellence

> -----Original Message-----
> From: jmkasunich [mailto:jmkasunich@...]
> Sent: Saturday, 27 July 2002 1:09 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: Speed of Tapping Head?
>
>
> --- In CAD_CAM_EDM_DRO@y..., "Peter Homann" <peter.homann@a...> wrote:
> > Hi Dave,
> >
> > Thanks for the reply. Surely the 2000rpm is for the input
> > spindle of the tapping head? Is the tap turning that fast,
> > or is it geared down by the tapping head. I was expecting
> > something like 30- 60 rpm.
>
>
> Nope, tapping heads are used in industry to tap at those
> kind of speeds (on small holes, like #6-32, etc.)
>
> The most important factor for tapping fast is the type of
> tap. The traditional hand tap is hopeless because of the
> need to break chips. For thru holes (or deep blind holes
> with chip space), use spiral point taps - the point design
> pushes the chips forward to clear the flutes. For blind
> holes you have to use spiral flute taps that pull the chip
> back like a drill bit.
>
> Personally, I'll never buy another hand tap. Spiral point
> taps are stronger and much easier to use. Spiral flute taps
> aren't as strong, so I only use them for blind holes, but
> they still beat hand taps.
>
> I've never tapped at 1000+ RPM myself, but I have power
> tapped 3/8-16 with a tap in my reversing drill press spindle
> at 100+ RPM, and I've done smaller holes using a tapping head
> at over 200 RPM. The difference is that the drill press takes
> several revolutions to stop and reverse when I hit the switch,
> but the tapping head can stop and reverse in less than one
> rev. So it's a lot easier to control the depth at high speed
> with the tapping head.
>
> Good luck with your project...
>
> John Kasunich
>
>
>
>
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