RYOBI vs SKIL Benchtop Drill Presses - Page 2 - Router Forums
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post #11 of 13 (permalink) Old 10-22-2012, 06:18 AM
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Motors rated in AMPS or WATTS are not the way to determine power. IF you take any electric motor and put really bad bearings in it the amps will go up and the ability to turn a drill-bit will go down. All amps mean is power taken from the grid, not an indication of what it will do. Cheap drills, vacuum cleaners and other items with incandescent bulbs are also quoted in watts, with the watts from the lamp and brush motor included in the overall total - again this means nothing as to what it will do for you. In your postings, I have either missed or it was never stated what you wish to do with this drill; are you a model maker that uses a 80 sized dill bit or do you want to cut 1" holes in 1/2" steel plate. What you need should be the determining factor as to the drill and it gee-whiz, I'm going to break soon, features.
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post #12 of 13 (permalink) Old 10-22-2012, 07:00 AM
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Motors rated in AMPS or WATTS are not the way to determine power. IF you take any electric motor and put really bad bearings in it the amps will go up and the ability to turn a drill-bit will go down. All amps mean is power taken from the grid, not an indication of what it will do. Cheap drills, vacuum cleaners and other items with incandescent bulbs are also quoted in watts, with the watts from the lamp and brush motor included in the overall total - again this means nothing as to what it will do for you. In your postings, I have either missed or it was never stated what you wish to do with this drill; are you a model maker that uses a 80 sized dill bit or do you want to cut 1" holes in 1/2" steel plate. What you need should be the determining factor as to the drill and it gee-whiz, I'm going to break soon, features.
I don't think what happens to the amperage draw when parts fail should be the basis for choosing machines! On an induction motor the amperage does give a very good indication of the power output. Maybe less so on a universal motor. It certainly is not an indication of quality. The 746 watts per HP is a defined standard. It is NOT a number I pulled out of a hat.

I do agree that a machine should be chosen to match the job, but being that the OP was looking for a bench top drill press on a wood working forum, I doubt that 1" holes in 1/2" plate steel was what he had in mind. Although I can't really know his intentions!

The main point about amperage and HP was that you can not directly compare ratings of universal motors and induction motors. Even if the true HP is the same, the torque is not.

So, if not by amps/HP, how do you suggest that we determine the relative power of electrical motors?

I have found that hand tools are the best choice when I want to make mistakes at a slower rate of speed.

I don't suffer from insanity. I enjoy every minute of it.
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post #13 of 13 (permalink) Old 10-22-2012, 09:37 AM Thread Starter
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I don't think what happens to the amperage draw when parts fail should be the basis for choosing machines! On an induction motor the amperage does give a very good indication of the power output. Maybe less so on a universal motor. It certainly is not an indication of quality. The 746 watts per HP is a defined standard. It is NOT a number I pulled out of a hat.

I do agree that a machine should be chosen to match the job, but being that the OP was looking for a bench top drill press on a wood working forum, I doubt that 1" holes in 1/2" plate steel was what he had in mind. Although I can't really know his intentions!

The main point about amperage and HP was that you can not directly compare ratings of universal motors and induction motors. Even if the true HP is the same, the torque is not.

So, if not by amps/HP, how do you suggest that we determine the relative power of electrical motors?
Spot on & thanks, on a router forum for woodworking the requirements were clear. Wouldn't use this for the steel projects I do. The drill I went with meets requirements for now.
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