A crafts forum. CraftBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » CraftBanter forum » Craft related newsgroups » Jewelry
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

How Fast Should A Trim Saw Run?



 
 
Thread Tools Display Modes
  #1  
Old September 16th 06, 04:40 PM posted to rec.crafts.jewelry
Too_Many_Tools
external usenet poster
 
Posts: 12
Default How Fast Should A Trim Saw Run?

Hi,

I have an used Rock Rascal that I wish to use to section rocks and
minerals.

It does not currently have a motor.

From reading supply websites, it would seem that a 1/3 hp 1725 motor is

sold for it.

Is there any advantage to using a more powerful or faster motor?

Is there any advantage of using a variable speed motor?

Thanks for any advice you might have to offer.

TMT


Ads
  #2  
Old September 16th 06, 11:06 PM posted to rec.crafts.jewelry
Carl 1 Lucky Texan
external usenet poster
 
Posts: 57
Default How Fast Should A Trim Saw Run?

Too_Many_Tools wrote:
Hi,

I have an used Rock Rascal that I wish to use to section rocks and
minerals.

It does not currently have a motor.

From reading supply websites, it would seem that a 1/3 hp 1725 motor is

sold for it.

Is there any advantage to using a more powerful or faster motor?

Is there any advantage of using a variable speed motor?

Thanks for any advice you might have to offer.

TMT



I think a blade manufacturer (like Daniel Lopacki or Diamond Pacific)
will have some reommended speed tables for the various sizes. In order
to keep the surface feet per minute up - generally smaller tools must
run at higher rpms. It also depends on the material you're cutting,
whether you're using oil, wtaer with soluble lube, or propylene glycol
coolants, etc.

Carl


--
to reply, change ( .not) to ( .net)

  #3  
Old September 17th 06, 01:10 AM posted to rec.crafts.jewelry
Jim
external usenet poster
 
Posts: 30
Default How Fast Should A Trim Saw Run?

On Sat, 16 Sep 2006 15:40:03 GMT, "Too_Many_Tools"
discovered a keyboard and, for our
edification and amusement, submitted

Hi,

I have an used Rock Rascal that I wish to use to section rocks and
minerals.


Please don't get in the habit of using a trim saw for sectioning
and/or slabbing. A trim saw blade is designed for just that purpose:
trimming. Hunking off slabs or sections of rock with a thin, delicate
trim saw blade is asking for $100-a-pop blade replacements on a
disgustingly regular basis...

It does not currently have a motor.

From reading supply websites, it would seem that a 1/3 hp 1725 motor is

sold for it.

Is there any advantage to using a more powerful or faster motor?


None whatsoever. If you do, you'll probably just go through the
diamond on the saw blade a lot faster - and the blades are the most
expensive part of the saw...

Is there any advantage of using a variable speed motor?


No more so than using one on a wood saw. Just let the blade do the
work. A steady pace and a steady feed does best.

Thanks for any advice you might have to offer.

TMT


Blessed be, for sure...

  #4  
Old September 17th 06, 01:22 AM posted to rec.crafts.jewelry
Peter W.. Rowe,
external usenet poster
 
Posts: 355
Default How Fast Should A Trim Saw Run?

On Sat, 16 Sep 2006 08:40:00 -0700, in rec.crafts.jewelry "Too_Many_Tools"
wrote:

Hi,

I have an used Rock Rascal that I wish to use to section rocks and
minerals.

It does not currently have a motor.

From reading supply websites, it would seem that a 1/3 hp 1725 motor is

sold for it.

Is there any advantage to using a more powerful or faster motor?


yes, to the sellers of the more powerful and faster motors, since they'll be
able to make more money from you, selling you the bigger motor. To you, there's
no advantage other than not having that pesky extra money around. A quarter to
third horsepower motor at 1725 rpm is just fine for your small saw. Remember in
use, you don't really want lots of extra pressure on the blade. It will cut
best with just modest feed pressure. More than that will wear out the blade
more quickly, not cut all that much faster, and will give you a less uniform
cut. Be sure to use a proper lubricant for the type of blade you've got and the
material being cut. Often it's just water with an additive to improve wetting
and impede corrosion. Some materials though, cut better with cutting oils.

Is there any advantage of using a variable speed motor?


No. the saw blades have an optimum speed of operation. Find that from the
manufacturer of your particular blade, or from a manufacturer of a similar type
of blade. If you need to adjust the speed of the blade, this is normally done
not with motor speed, but by choosing the appropriate pulley on the motor, since
almost all these machines are belt driven. The blade speed depends on the
pulley combination used on the machine and motor. The motors themselves can be
very generic standard "washing machine" type motors. Used to be, you could pick
them up for five or ten bucks as used motors at salvation army or similar
stores, or yard sales. Anything more sophisticated than that is overkill for
the saw.

Now, for some combined lapidary units, it may be useful to have a dual speed
motor, if you're running not just a saw, but several different types or sizes of
sanding or buffing wheels too, since sometimes a slower or faster speed can be
handy, especially when working with softer or more fragile materials. But just
for sawing, that's not usually useful. Precision grinding machines like
faceting machines often do have variable speed motors, and for that type of
very picky grinding and polishing, it's quite useful, even essential sometimes.
But those machines are a whole different ballpark than a rock raskal...

Thanks for any advice you might have to offer.

TMT

  #5  
Old September 17th 06, 07:44 PM posted to rec.crafts.jewelry
Too_Many_Tools
external usenet poster
 
Posts: 12
Default How Fast Should A Trim Saw Run?

Thanks for the advice.

The trim saw will be used to section small stones for mineralogical
work so it should work well for the intended use.

TMT

Too_Many_Tools wrote:
Hi,

I have an used Rock Rascal that I wish to use to section rocks and
minerals.

It does not currently have a motor.

From reading supply websites, it would seem that a 1/3 hp 1725 motor is

sold for it.

Is there any advantage to using a more powerful or faster motor?

Is there any advantage of using a variable speed motor?

Thanks for any advice you might have to offer.

TMT



  #6  
Old September 20th 06, 06:01 AM posted to rec.crafts.jewelry
lapidaryrough
external usenet poster
 
Posts: 1
Default How Fast Should A Trim Saw Run?

As the ohter members said the trim saw is for slabs only. the Speed
for all Diamond saw blades is 3800-4200 Sufface feet a minut. If your
coolent gets over 100- degree your cutting face temp is 265 degrees
diamonds blow up at temps over 260 degrees. This comes from Dean at
MK-blades, I have been using MK-blades for over 45 years and my Congo
blades I still use though thay are rear Black diamond. Jack Cole
Salem,Oregon
Too_Many_Tools wrote:
Hi,

I have an used Rock Rascal that I wish to use to section rocks and
minerals.

It does not currently have a motor.

From reading supply websites, it would seem that a 1/3 hp 1725 motor is

sold for it.

Is there any advantage to using a more powerful or faster motor?

Is there any advantage of using a variable speed motor?

Thanks for any advice you might have to offer.

TMT



  #7  
Old September 20th 06, 06:07 AM posted to rec.crafts.jewelry
Peter W.. Rowe,
external usenet poster
 
Posts: 355
Default How Fast Should A Trim Saw Run?

On Tue, 19 Sep 2006 22:00:55 -0700, in rec.crafts.jewelry "lapidaryrough"
wrote:

As the ohter members said the trim saw is for slabs only. the Speed
for all Diamond saw blades is 3800-4200 Sufface feet a minut. If your
coolent gets over 100- degree your cutting face temp is 265 degrees
diamonds blow up at temps over 260 degrees. This comes from Dean at
MK-blades, I have been using MK-blades for over 45 years and my Congo
blades I still use though thay are rear Black diamond. Jack Cole
Salem,Oregon



All true enough, with one exception. diamonds do not blow up at 260 degrees.
they can take quite elevated temperatures. (like closer to 1200F). And when
overheated, in the presence of oxygen, they don't blow up. The just slowly
start to burn. makes the surface milky white and the stones cloudy on the
surface.

What your informate may have meant might have been the use of the words "blow
up" as dramatic effect rather than accurate description. He may have meant that
if the blade gets too hot (and perhaps 265 is too hot), that then the diamond
sintered or imbedded/notched or plated cutting tool will be damaged, usually by
loss of the diamond particles. It occurs to me that the rate of thermal
expansion in diamond is significantly less than that rate in most metals.
Perhaps what happens is that if the blade edge gets too hot, the metal expands
more than the diamond particles imbedded in it, allowing the diamond particles
to be less tightly gripped, and they then can be pulled out by the friction of
the cutting action. Just a guess.

Peter
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Knitting speed ?? Yarn 40 August 22nd 06 09:50 PM
AD: Scrapbook & Stamping Fibers, Low Prices Fast Shipping Spot Rubberstamps 0 May 31st 04 05:57 PM
Ameritool trim saw and grinder/polisher Darwin's Chimp Jewelry 1 April 8th 04 05:06 AM
Paton's Fast & Easy Mohair knits...knit any yet? Linda D. Yarn 0 February 22nd 04 03:30 AM
How fast is fast? Denise Yarn 12 January 5th 04 04:27 PM


All times are GMT +1. The time now is 05:23 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 CraftBanter.
The comments are property of their posters.