It'll probably kill the motor at some point, but 3-4 years of running is not an issue.

and since its been over a year no support

Naturally, the warranty expired in March (1 year after purchase) while I was still in Afghanistan.

We love this grinder but find ourselves replacing it every year just after the warranty expires!

Lasted one year and one week before burning out.

i've burned out two of these--the first lasted a year, the second lasted about 5mo.