My Dremel's go back a good many years. My first one was a a variable speed model with bronze bearings, they were pricey back in the early 70's. I wore out the bearing at the working end of the tool, banged the bearing with a flat punch and mallet. This will give the bearing a bit more life. Used it fine for a while but don't use it to the point the tool gets hot. Getting it hot is bad news and it took out the internal speed controller. Turning on the tool would trip the main breaker. Years later I became richer and/or the Dremel became cheaper and I have several all are ballbearing variable speed.
I have several because as soon as the tool gets very warm I drape it across a fast fan to cool and use another. Most of my Dremel's are of the older design using a metal sub-frame. The later type, along with most other handheld power tools, no longer use a metal sub-frame. The plastic body of the tool is also the frame. I say it's best not to run these types of tools to the point they feel hot.
I use the Dremel for cutting, grinding and polishing but not drilling. The body of the Dremel is not rigid enough for drilling. The end attachments used most frequently are cut-off wheel, emery embedded rubber wheel and various grinding attachments.
Most of my firearms are untouched by the Dremel. Largely used on the 1911 and for deburriing on some others.
I have several because as soon as the tool gets very warm I drape it across a fast fan to cool and use another. Most of my Dremel's are of the older design using a metal sub-frame. The later type, along with most other handheld power tools, no longer use a metal sub-frame. The plastic body of the tool is also the frame. I say it's best not to run these types of tools to the point they feel hot.
I use the Dremel for cutting, grinding and polishing but not drilling. The body of the Dremel is not rigid enough for drilling. The end attachments used most frequently are cut-off wheel, emery embedded rubber wheel and various grinding attachments.
Most of my firearms are untouched by the Dremel. Largely used on the 1911 and for deburriing on some others.