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

Hi Dave,

thanks for the info.

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: turbulatordude [mailto:davemucha@...]
> Sent: Saturday, 27 July 2002 9:36 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: Speed of Tapping Head?
>
>
> I double checked today and I run 1/8 npt, these are close to the size
> of a 1/2 inch tap, but are tapered so are harder to tap. I run those
> at 650 rpm.
>
> I run 1/4-20 and 10-32 at 1,000 rpm. With the Procunier, the tap
> pulls itself into the material, and Either the drill press hits a
> stop I set up, or I chose to stop the forward motion and have the tap
> reverse. I like the slower speeds as I can stop it a little more
> precicely.
>
> I can not imagine taping at 60 RPM. no need to go that slow, and
> besides my drill press slow speed is closer to 250 RPM.
>
> Dave
>
>
>
>
> --- In CAD_CAM_EDM_DRO@y..., "doug98105" <dougrasmussen@c...> wrote:
> > Peter,
> >
> > I have a lead screw (actually change gears) tapping machine. Looks
> > very much like a drill press. Capacity is 5/16". It came from the
> > factory with only has two speeds, 1000 & 2000 rpm.
> >
> > One important factor about tapping speed is whether you are
> depending
> > on the tap to pull itself into the material and determine it's own
> > lead (like using a drill press tapping attachment) or whether the
> > machine somehow determines the lead. The difference being when the
> > lead is determined by the machine, not so much load is on the tap
> and
> > much, much higher speeds are possible. Rigid tapping on CNC
> > machining centers typically run up to 5000rpm!!
> >
> > With my tapping machine I mostly use the 1000rpm speed, but for
> > anything about 32 tpi or finer pitch I'll use 2000rpm. We very
> > seldom break a tap, and when we do it's not because of the speed.
> >
> > I think your 30 to 60 rpm is much too slow. That can be almost as
> > bad as too fast.
> >
> > Doug
> >
> >
> >
> >
> >
> >
> >
> > --- 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.
> > >
> > > Thanks
> > >
> > > Peter Homann
> > > <mailto:peter.homann@a...>
> > > 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: turbulatordude [mailto:davemucha@j...]
> > > > Sent: Friday, 26 July 2002 9:12 PM
> > > > To: CAD_CAM_EDM_DRO@y...
> > > > Subject: [CAD_CAM_EDM_DRO] Re: Speed of Tapping Head?
> > > >
> > > >
> > > > My Procunier manual says that for my #1 tapping head, that
> 3,000
> > RPM
> > > > is the maximum tapping speed. This one handles up to a 1/4
> inch
> > tap
> > > > in aluminum, or an 8mm threadforming tap.
> > > >
> > > > the maximum for my #2 head is 2,000 RPM. and that one handles
> up
> > to
> > > > a 1/2 inch tap in aluminum.
> > > >
> > > > I usualy tap at much lower speeds (500 rpm) (thank goodnes that
> > there
> > > > are no metric time units to convert) as I think tap life would
> be
> > > > increased and since I am not a production shop, tap life is way
> > more
> > > > important than speed of making a part. Also since I usually
> tap
> > at
> > > > 1/4 in in aluminum on the #1 and 1/8npt on the #2.
> > > >
> > > > If you wanted to figure out exactly the most desirable maximum
> > speed
> > > > for your part, figure the tap circumference to determine sfpm
> of
> > the
> > > > cutter. Then you can look up the metal you are tapping and
> figure
> > > > the cutting speed. Kind of like figuring lathe rpm by surface
> > feet
> > > > per minute. Then with the tap material, probably HSS, you can
> > locate
> > > > the best cutting speed SFPM.
> > > >
> > > > and remember to keep the taps well lubricated. probably the
> > single
> > > > biggest thing to keep tap life.
> > > >
> > > > Hope that helps.
> > > >
> > > > Dave
> > > >
> > > >
> > > >
> > > > --- In CAD_CAM_EDM_DRO@y..., "Peter Homann" <peter.homann@a...>
> > wrote:
> > > > > Hi,
> > > > >
> > > > > I'm looking at constructing a small electronic tapping head
> for
> > my
> > > > Taig CNC
> > > > > Mill. By electronic, I mean that the tapping head will be
> > driven by
> > > > a small
> > > > > 12 dc motor geared down to an appropriate speed. The
> direction
> > will
> > > > be
> > > > > controlled by micro switches and possibly a PIC
> microprocessor.
> > > > >
> > > > > The tapping head is to tap up to 6mm (1/4"), and if I can
> 8mm.
> > My
> > > > question
> > > > > is:
> > > > >
> > > > > What is an appropriate speed for a tapping head?
> > > > >
> > > > > Thanks in advance.
> > > > >
> > > > > Peter Homann
> > > > > <mailto:peter.homann@a...>
> > > > > 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
> > > >
> > > >
> > > > Addresses:
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>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru Google.com
> to reach it if you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider
> this as a sister site to the CCED group, as many of the same
> members are there, for OT subjects, that are not allowed on
> the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY
> POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO
> EXCEPTIONS........
>
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