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Posted by F. George McDuffee on May 19, 2008, 1:16 pm
Please log in for more thread options
posted to both amc & rcm
For our money players in AMC
How much are you using the traditional square ground lathe tool
bits? If you are, are you using M2, M2Al, 5% or 10% cobalt? Do
you hand grind, or use a surface grinder w/fixtures or
attachments, i.e. radius dressers? Also for what purposes, e.g.
special form tools, special threads such as acme or buttress,
general machining where the material damages high $ carbide such
as excessive scale or inclusions?
For everyone
If you are using square ground tool bits, how much difference [if
any] can you tell between the generic import M2, the domestic M2
and the newer alloys like M2Al, and the 5/10% cobalts?
Specifically is the Armstrong M2 tool bit worth 3X to 4X [or
more] than the import M2, or is this another "Starbucks?"?
Does anyone know if the "domestic" M2/M42 tool bits are actually
made in the USA from "Mercan" steel, or are these just import
M2/M42 tool bits repacked with a "made in USA sticker" on the box
and a higher price tag?
Also, I am in the process of ordering some 3/8 and 7/16 bits for
my new shaper. I am shocked -- shocked by the jump in M2 prices
from the last time I bought [for some suppliers > 250%]. Are all
HSS tool prices rising like a rocket?
Unka' George [George McDuffee]
-------------------------------------------
He that will not apply new remedies,
must expect new evils:
for Time is the greatest innovator: and
if Time, of course, alter things to the worse,
and wisdom and counsel shall not alter them to the better,
what shall be the end?
Francis Bacon (1561-1626), English philosopher, essayist, statesman.
Essays, "Of Innovations" (1597-1625).
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Posted by Why on May 19, 2008, 1:59 pm
Please log in for more thread options >posted to both amc & rcm
>
>For our money players in AMC
>
>How much are you using the traditional square ground lathe tool
>bits? If you are, are you using M2, M2Al, 5% or 10% cobalt? Do
Crucible CPM T15 for form tools for the screw machines OLD ones.
Bought a bunch 25 yrs ago, don't know if you can get T15 anymore.
Grinds like butter & will run & run (with OIL) <G>.
Also have 1/2-3/8-5/16-1/4" bits.
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Posted by F. George McDuffee on May 19, 2008, 3:13 pm
Please log in for more thread options
>>posted to both amc & rcm
>>
>>For our money players in AMC
>>
>>How much are you using the traditional square ground lathe tool
>>bits? If you are, are you using M2, M2Al, 5% or 10% cobalt? Do
>Crucible CPM T15 for form tools for the screw machines OLD ones.
>Bought a bunch 25 yrs ago, don't know if you can get T15 anymore.
>Grinds like butter & will run & run (with OIL) <G>.
>Also have 1/2-3/8-5/16-1/4" bits.
========
Thanks for the info.
T-15 tool bits are still available. For example
http://littlemachineshop.com/products/product_view.php?ProductID=1717
and
http://littlemachineshop.com/products/product_view.php?ProductID=1718
high priced spread
http://westsidedelivers.com/item.asp?PID=19759
http://toolsteelnow.com/datash/ToolBits.pdf
I will add T-15 to the what tools are you using list.
FWIW -- T-15 specifications
http://toolsteelnow.com/products/additional/toolbit.cfm
The only T-15 tool that I use [that I know of] is a P type cutoff
tool from Somma [p/n BL844V] that fits my shop-made rear mount
[upside-down] cut-off tool holder. Works well and easily cuts
hard material such as the salvage 2 inch diameter pump shafts
that I use for bar stock. I generally have to use brazed carbide
for turning this stuff, but may get a T-15 tool bit and try that.
see http://www.mcduffee-associates.us/machining/rearcoth.htm for
details of the holder.
Unka' George [George McDuffee]
-------------------------------------------
He that will not apply new remedies,
must expect new evils:
for Time is the greatest innovator: and
if Time, of course, alter things to the worse,
and wisdom and counsel shall not alter them to the better,
what shall be the end?
Francis Bacon (1561-1626), English philosopher, essayist, statesman.
Essays, "Of Innovations" (1597-1625).
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Posted by Randy on May 19, 2008, 6:57 pm
Please log in for more thread options On Mon, 19 May 2008 12:16:54 -0500, F. George McDuffee
>posted to both amc & rcm
>
>For our money players in AMC
>
>How much are you using the traditional square ground lathe tool
>bits? If you are, are you using M2, M2Al, 5% or 10% cobalt? Do
>you hand grind, or use a surface grinder w/fixtures or
>attachments, i.e. radius dressers? Also for what purposes, e.g.
>special form tools, special threads such as acme or buttress,
>general machining where the material damages high $ carbide such
>as excessive scale or inclusions?
>
>For everyone
>
>If you are using square ground tool bits, how much difference [if
>any] can you tell between the generic import M2, the domestic M2
>and the newer alloys like M2Al, and the 5/10% cobalts?
>
>Specifically is the Armstrong M2 tool bit worth 3X to 4X [or
>more] than the import M2, or is this another "Starbucks?"?
>
>Does anyone know if the "domestic" M2/M42 tool bits are actually
>made in the USA from "Mercan" steel, or are these just import
>M2/M42 tool bits repacked with a "made in USA sticker" on the box
>and a higher price tag?
>
>Also, I am in the process of ordering some 3/8 and 7/16 bits for
>my new shaper. I am shocked -- shocked by the jump in M2 prices
>from the last time I bought [for some suppliers > 250%]. Are all
>HSS tool prices rising like a rocket?
>
>
>Unka' George [George McDuffee]
>-------------------------------------------
Only use them on occasion, have not bought any in years.
I do have a bunch for sale 5/8" and bigger, M42, T5 and T15.
http://www.enter.net/~rbraun/toolbits.jpg
make offer plus shipping.
Thank You,
Randy
Remove 333 from email address to reply.
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Posted by F. George McDuffee on May 19, 2008, 6:35 pm
Please log in for more thread options wrote:
>On Mon, 19 May 2008 12:16:54 -0500, F. George McDuffee
>
>>posted to both amc & rcm
>>
>>For our money players in AMC
>>
>>How much are you using the traditional square ground lathe tool
>>bits? If you are, are you using M2, M2Al, 5% or 10% cobalt? Do
>>you hand grind, or use a surface grinder w/fixtures or
>>attachments, i.e. radius dressers? Also for what purposes, e.g.
>>special form tools, special threads such as acme or buttress,
>>general machining where the material damages high $ carbide such
>>as excessive scale or inclusions?
>>
>>For everyone
>>
>>If you are using square ground tool bits, how much difference [if
>>any] can you tell between the generic import M2, the domestic M2
>>and the newer alloys like M2Al, and the 5/10% cobalts?
>>
>>Specifically is the Armstrong M2 tool bit worth 3X to 4X [or
>>more] than the import M2, or is this another "Starbucks?"?
>>
>>Does anyone know if the "domestic" M2/M42 tool bits are actually
>>made in the USA from "Mercan" steel, or are these just import
>>M2/M42 tool bits repacked with a "made in USA sticker" on the box
>>and a higher price tag?
>>
>>Also, I am in the process of ordering some 3/8 and 7/16 bits for
>>my new shaper. I am shocked -- shocked by the jump in M2 prices
>>from the last time I bought [for some suppliers > 250%]. Are all
>>HSS tool prices rising like a rocket?
>>
>>
>>Unka' George [George McDuffee]
>>-------------------------------------------
>
>Only use them on occasion, have not bought any in years.
>
>I do have a bunch for sale 5/8" and bigger, M42, T5 and T15.
>
>http://www.enter.net/~rbraun/toolbits.jpg
>
>make offer plus shipping.
>
>Thank You,
>Randy
>
>Remove 333 from email address to reply.
=============
Thanks for the offer.
The absolute max for the tool post on my Atlas 7B shaper is 7/16.
I got to checking the back of the tool box drawers, etc. and
found several 7/16 sq M-2 tool bits.
Hope someone else is in a position to use the larger sizes.
Unka' George [George McDuffee]
-------------------------------------------
He that will not apply new remedies,
must expect new evils:
for Time is the greatest innovator: and
if Time, of course, alter things to the worse,
and wisdom and counsel shall not alter them to the better,
what shall be the end?
Francis Bacon (1561-1626), English philosopher, essayist, statesman.
Essays, "Of Innovations" (1597-1625).
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>
>For our money players in AMC
>
>How much are you using the traditional square ground lathe tool
>bits? If you are, are you using M2, M2Al, 5% or 10% cobalt? Do