Home Repair (alt.home.repair) For all homeowners and DIYers with many experienced tradesmen. Solve your toughest home fix-it problems.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Posted to alt.home.repair
external usenet poster
 
Posts: 19
Default pneumatic die grinders-- cheap v quality?

Hi!

I do marble carving; started somewhat recently. I've used
chisels so far, but I really need to look at rotary for undercuts and
delicate areas.

I'm considering foredoms, but, air die grinders appeal-- buy a
compressor, which I need for many things anyway , and then plop $20-
$100 for a pneumatic die grinder. They're also higher-rpm, possibly a
benefit though overheating can be as much a worry at high rpm as
chatter may be at low.

For both I worry about dust. Marble... seems harder than mild
steel, when I accidentally forged some mild steel chisels they
mushroomed over instantly; but is rather softer than tool steel. So
the case may be made that some parts in the die grinder are going to
abrade anyway so I should get cheap and recyclable grinders?

This varies categorically. I don't buy dirt-cheap bits for
example, the steel quality and grinding precision is pitiful; a mid-
range I find sufficient value for my needs. I do buy cheap ear
protection, gloves, some lifting equipment-- sometimes the difference
between name brand and brand X is only that, and the products are
identical.

So where do die grinders fall? What brands do you like? If I
might burn through bearings; are some better shielded for longer
lifespan --enough so, that $/hour used is lower? Harbor freight?
Random ebay powersellers?
Another issue, beyond bearing slop, is air consumption (also a result
of machining tolerance). My compressor does 8cfm, theoretically, at
90psi; but if name brand vs. brand x is a difference of a few cubic
feet per minute, might be worth the name brand? If only for the noise
(quiet matters) :-)


thanks!!
-Bernard

  #2   Report Post  
Posted to alt.home.repair
external usenet poster
 
Posts: 280
Default pneumatic die grinders-- cheap v quality?

i use the harbor freight ones ,throw away when they go bad.i bought a
expensive one and it only lasted a little longer..lucas

http://www.minibite.com/america/malone.htm

  #3   Report Post  
Posted to alt.home.repair
external usenet poster
 
Posts: 903
Default pneumatic die grinders-- cheap v quality?

Grinders won't fail if you keep them lubricated with air tool oil.
Don't waste your time on fractional horse power die grinders.
Purchase a one horse power die grinder for about $100
  #4   Report Post  
Posted to alt.home.repair
external usenet poster
 
Posts: 636
Default pneumatic die grinders-- cheap v quality?

Bernard Arnest wrote:
Hi!

I do marble carving; started somewhat recently. I've used
chisels so far, but I really need to look at rotary for undercuts and
delicate areas.

I'm considering foredoms, but, air die grinders appeal-- buy a
compressor, which I need for many things anyway , and then plop $20-
$100 for a pneumatic die grinder. They're also higher-rpm, possibly a
benefit though overheating can be as much a worry at high rpm as
chatter may be at low.

For both I worry about dust. Marble... seems harder than mild
steel, when I accidentally forged some mild steel chisels they
mushroomed over instantly; but is rather softer than tool steel. So
the case may be made that some parts in the die grinder are going to
abrade anyway so I should get cheap and recyclable grinders?

This varies categorically. I don't buy dirt-cheap bits for
example, the steel quality and grinding precision is pitiful; a mid-
range I find sufficient value for my needs. I do buy cheap ear
protection, gloves, some lifting equipment-- sometimes the difference
between name brand and brand X is only that, and the products are
identical.

So where do die grinders fall? What brands do you like? If I
might burn through bearings; are some better shielded for longer
lifespan --enough so, that $/hour used is lower? Harbor freight?
Random ebay powersellers?
Another issue, beyond bearing slop, is air consumption (also a result
of machining tolerance). My compressor does 8cfm, theoretically, at
90psi; but if name brand vs. brand x is a difference of a few cubic
feet per minute, might be worth the name brand? If only for the noise
(quiet matters) :-)


Pay attention to the RPM. Proper speed varies depending on the target:

Fine grinding 10,000 RPM
Rough grinding and buffing 10,000 - 20,000 RPM
Metal 20,000

They cost less than $20 at HF. If it wears out, toss it.


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Power quality monitor -- cheap? John E. Electronics Repair 26 February 27th 07 01:20 PM
ALL OVER THE WORLD, QUALITY AND CHEAP!!! George Woodworking 7 August 10th 06 11:34 AM
Cheap bench grinders? al UK diy 12 January 24th 06 08:51 AM
cheap porcelain tile ,high quality Jerry Home Repair 0 December 20th 05 03:16 AM
Pneumatic Finish Nailer or pneumatic stapler Danny Home Repair 10 March 26th 05 06:09 PM


All times are GMT +1. The time now is 04:18 PM.

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

About Us

"It's about DIY & home improvement"