Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work.

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Old February 21st 08, 04:55 PM posted to rec.crafts.metalworking
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Default Reamer RPM Chart?

Anyone have a good reamer RPM chart?

I usually figure 2/3 of drilling RPM, but that's not always good enough.

For instance, .885" dia. reamer into steel, shallow process only 3/4"
stroke... I would normally run at 100RPM or so... But I'm guessing that is
ultra conservative for some of you.

The reamer is removing .010" material if it matters.

Regards,
Joe Agro, Jr.
(800) 871-5022
01.908.542.0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

V8013-R




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Old February 21st 08, 10:28 PM posted to rec.crafts.metalworking
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Default Reamer RPM Chart?


"Joe AutoDrill" wrote in message
news:[email protected]
Anyone have a good reamer RPM chart?

I usually figure 2/3 of drilling RPM, but that's not always good enough.

For instance, .885" dia. reamer into steel, shallow process only 3/4"
stroke... I would normally run at 100RPM or so... But I'm guessing that
is ultra conservative for some of you.

The reamer is removing .010" material if it matters.

Regards,
Joe Agro, Jr.
(800) 871-5022
01.908.542.0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

V8013-R


Go to morse cutting tool's website. In their PDF catalog are some great
charts we downloaded this week.

http://www.morsecuttingtools.com/catalog.asp


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Old February 21st 08, 11:21 PM posted to rec.crafts.metalworking
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Default Reamer RPM Chart?

On Thu, 21 Feb 2008 16:55:20 GMT, "Joe AutoDrill" wrote:

Anyone have a good reamer RPM chart?

I usually figure 2/3 of drilling RPM, but that's not always good enough.

For instance, .885" dia. reamer into steel, shallow process only 3/4"
stroke... I would normally run at 100RPM or so... But I'm guessing that is
ultra conservative for some of you.

The reamer is removing .010" material if it matters.

Regards,
Joe Agro, Jr.




I thought that the conventional wisdom was half the speed and twice the
feed-per-rev.


Mark Rand
RTFM
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Old February 22nd 08, 01:27 AM posted to rec.crafts.metalworking
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Default Reamer RPM Chart?

On Thu, 21 Feb 2008 22:28:04 GMT, "Jon"
wrote:


"Joe AutoDrill" wrote in message
news:[email protected]
Anyone have a good reamer RPM chart?

I usually figure 2/3 of drilling RPM, but that's not always good enough.

For instance, .885" dia. reamer into steel, shallow process only 3/4"
stroke... I would normally run at 100RPM or so... But I'm guessing that
is ultra conservative for some of you.

The reamer is removing .010" material if it matters.

Regards,
Joe Agro, Jr.
(800) 871-5022
01.908.542.0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

V8013-R


Go to morse cutting tool's website. In their PDF catalog are some great
charts we downloaded this week.

http://www.morsecuttingtools.com/catalog.asp

That looks like a modern version of a pocket edition of a "Machinist's
Practical Guide" that Morse published in 1980 and sold for $1.20. I
got my copy for a quarter last summer complete with it's own supply of
waterproofing oil.
Gerry :-)}
London, Canada
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Old February 22nd 08, 02:26 AM posted to rec.crafts.metalworking
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Default Reamer RPM Chart?

On 21 Feb, 16:55, "Joe AutoDrill" wrote:
Anyone have a good reamer RPM chart?


Regards,
Joe Agro, Jr.
(800) 871-5022
01.908.542.0244
Automatic / Pneumatic Drills:http://www.AutoDrill.com
Multiple Spindle Drills:http://www.Multi-Drill.com

V8013-R


Here`s a chart from one of the leading manufacturers,It`s in mm`s
though.

http://www.taylorandjones.co.uk/pdf/...al_section.pdf

Mark.



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Old February 22nd 08, 05:22 AM posted to rec.crafts.metalworking
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Posts: 33
Default Reamer RPM Chart?

On Feb 21, 6:21*pm, Mark Rand wrote:

I thought that the conventional wisdom was half the speed and twice the
feed-per-rev.


I usually go more like 1/4 to 1/3 of standard cutting RPM. Reamers
change size as they get dull which means your (precision) fit will
change agressively if you spin too fast. Chucking reamers are
essentially not resharpenable.

As for feed, at *least* twice, typically more like 4x or more.
Chucking reamers have a natural feed rate. Feed *hard*. The reamer
will naturally restrict the downward force when you're feeding too
hard and you'll feel this happen (not easy to do, BTW).

A lot of people run reamers incorrectly because they're used to
drilling. Reamers typically have six or more flutes, and are removing
very little material. When reamers are fed too lightly, they give
inconsistant results.

Low RPM, push as hard as the reamer will allow. If your hole ends up
too big, use a stone to *slightly* dull the flutes in order to control
the hole size/fit. *Always* make a test hole if the fit is important,
always use cutting oil, and never run the reamer in reverse.

Regards,

Robin
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Old February 25th 08, 01:35 PM posted to rec.crafts.metalworking
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Default THANKS - Reamer RPM Chart?

Thanks to everyone for the info. Some was technical, some was experiential,
some was rebuttalism, etc... All was appreciated.

Regards,
Joe Agro, Jr.
(800) 871-5022
01.908.542.0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

V8013-R


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Old February 25th 08, 11:32 PM posted to rec.crafts.metalworking
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Posts: 853
Default THANKS - Reamer RPM Chart?

On Mon, 25 Feb 2008 13:35:34 GMT, "Joe AutoDrill" wrote:

Thanks to everyone for the info. Some was technical, some was experiential,
some was rebuttalism, etc... All was appreciated.

Regards,
Joe Agro, Jr.



What are friends for?


No, really, what _are_ friends for? G


Mark Rand
RTFM


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