On 2/20/2014 9:55 AM, Mike Reublin NF4L wrote:
I ran across the DeWalt DWD460 drill. It draws 11 amps, and has continuously
variable speeds in 2 ranges( 0 300 and 0 1300 RPM). Seems like that would get
away from the overheating problem in the worm-gear winches.
There are rating and there are ratings. Most drill motors are rated for
intermittent duty with short run times and long cooling cycles.
I purchased the largest Dewalt that Lowe's carries. Drilling 3/4" holes
in 1/2" thick I-beam, I burned it up in less than 5 minutes and I had
just purchased it.
Drill motors for mixing as have been listed on here may be rated
differently, or with a larger reserve/safety factor than those for
drilling holes. IOW two motors rated at 13A with one for mixing and one
for drilling may not have the same ability to raise a tower.
I've not found a correlation in the ratings. From experience, I've
found a drastic difference in ratings for drill motors rated for long
run times VS the typical short run times for drilling holes.
I'd limit my purchases to a motor rated for long run times such as mixing.
Caveat Emptor
73
Roger (K8RI)
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