Tools, Sharpening and Power Machinery - Cheapie Rotozip knockoff - Hot !!

I bot a rotozip took from Chicago Tools (i.e. Harborfreight Company), and on my first use of it, the tool would get hot in my hand within 5 minutes. Now, my first application was using a diamond-studded grinding stone to knock-off burrs from some concrete....so that could have been the cause.
I wonder if the "real" rotozip stays cool regardless of application....
Anyone have an official rotozip that can respond ? Greatly appreciated !

I have a rotarytool from Craftsman that will get hot if using it for extended periods

I've used my Roto Zip on some odd materials but not concrete
It doesn't get hot when used for extended periods
Or on tough material...so far

Sounds like the Dremel tool has some proprietary design that permits it to stay cool.......as the responses so far are pointing in that direction.

Anyone else have either a Dremel or "other" rotozip-like tool ?

Oh, um...they are 2 different tools
The Rotozip is a larger rotary with some torque
Basically a small router
It's pretty beefy
Invented by a drywaller who stuck a nail in a router to cut drywall better
Now has bits for everything and many attachments
This is what I though you were refering too


The Dremel is a much smaller tool
High RPMs but no torque to speak of
Much more delicate
But extremly handy
I have a Craftsman branded one, made by the Dremel company
It's older so I don't know if this is still true of the Craftsman branded ones
This I have also used on many materials, many times for extended lengths
Although it's more delicate, I have cut through auto suspension bolts w/o problems
You just need to use the RPMs and not press to hard
I don't recall using it on concrete
But I can say I've had no heat with that either

mark,

I have a Porter Cable version of RotoZip and a similar tool, a Makita die grinder.
Both of these tools will get hot when worked hard.

It's hard to describe how to tell when you are working a tool too hard.
You can use the guideline that the slower you make the rpm of the tool go by pressing it into the work, the more heat producing amperage the tool will draw to try to maintain rpm.
A RotoZip tool is for very light duty work and maybe a 4" angle grinder with a masonary wheel would be a more appropriate tool for the job.

A way to check the tool is to just run it for 5 minutes without doing anything to see how warm it gets.

Bottomline, I think the Chicago tool is OK.....my application produced a lot of vibration and that probably contributed to the heat. It stays pretty cool when just running without any force.
Overall, my experience with Chicago Tools has been pretty good...natch, they are no match for professional grade tools. But, for the PRICE, they can do a good job for sometimes the cost of renting a tool at Taylor Rental or the Home Depot.
Only caveat: getting warranty replacements or parts is a real hassle.....the company says they back their tools, but my experience says its only lip service.

...Overall, my experience with Chicago Tools has been pretty good......Only caveat: getting warranty replacements or parts is a real hassle.....the company says they back their tools, but my experience says its only lip service.
as with most things, you get what you pay for. :rolleyes: