Why is the Bosch MRC23EVSK rated at 2.3 hp? - Router Forums
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post #1 of 12 (permalink) Old 01-01-2015, 09:22 PM Thread Starter
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Default Why is the Bosch MRC23EVSK rated at 2.3 hp?

The Bosch MRC23EVSK, which comes as a motor, plunge base and fixed base, just like all the 2-1/4 hp routers with which I am familiar, differs from the 2-1/4 routers in that it is rated at 15 amp like all the 3-1/4 hp routers. All other 2-1/4 hp routers are rated at 11 amp.
Is it an horrendously inefficient motor, a typo propagated prolifically or is there some other explanation?

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post #2 of 12 (permalink) Old 01-01-2015, 09:31 PM
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according to tech support...
newer more efficient motor...
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File Type: pdf Rating Tools Based on Ratings.pdf (78.9 KB, 73 views)

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post #3 of 12 (permalink) Old 01-01-2015, 10:50 PM
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Maybe Bosch decided to post a power rating that was a little more honest than everyone else. Compare the 15 amps to the other manufacturer's 15 amp motors Tom.

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post #4 of 12 (permalink) Old 01-02-2015, 12:04 AM
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Quote:
Originally Posted by Cherryville Chuck View Post
Maybe Bosch decided to post a power rating that was a little more honest than everyone else. Compare the 15 amps to the other manufacturer's 15 amp motors Tom.
Honesty in hp rating..
That's refreshing
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post #5 of 12 (permalink) Old 01-02-2015, 12:04 AM Thread Starter
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Quote:
Originally Posted by Cherryville Chuck View Post
Maybe Bosch decided to post a power rating that was a little more honest than everyone else. Compare the 15 amps to the other manufacturer's 15 amp motors Tom.
Charles, your suggestion makes a lot of sense. If we take volts x amps = watts, and convert that to hp, for 15 amp, 120 volt it is 2.4 hp. A 3.25 hp motor at 120 volts would require over 20 amps.
Thanks very much.

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post #6 of 12 (permalink) Old 01-02-2015, 12:09 AM Thread Starter
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according to tech support...
newer more efficient motor...
Stick, your attachment seems to me to indicate the motor is less efficient, and everything I can find indicates the MRC23EVS is a newer model than the 1617EVSPK. So I am left more confused.

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post #7 of 12 (permalink) Old 01-02-2015, 08:04 AM
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Hp is a numbers game manipulated by the sales dept IMHO.

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Using a couple of old Craftsman routers & a Bosch 1617EVSPK & a Dewalt DWP611PK Routers in SW Louisiana.
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post #8 of 12 (permalink) Old 01-02-2015, 08:40 AM
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There isn't much that is in that article that I agree with. In my opinion, rpm is more a measure of stored energy. Even he admitted that universal motors lose it quickly. Whenever you use a router you hear it slow way down as soon as you start cutting and I think the manufacturers are calculating something more along the lines of stall or brake horsepower which is how much force is required to bring it to a stop once you wind it up all the way. This only measures power over a very short interval and has absolutely nothing to do with the actual amount of work the tool is capable of.

If they were really honest they would post input watts and the efficiency rating or the actual output watts which is the same thing. That will give you a much better idea of how much work you can do with the tool. Without the actual rating your best bet is to just match the amp draw from one tool to the next. Most of the better names will be similar as far as efficiency goes so the rest of the decision is how do you like the machines features and how does it feel in your hands?

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post #9 of 12 (permalink) Old 01-02-2015, 10:55 AM
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VS tools are supposed to maintain their speed and power under an ordinary or instantaneous over load.
To do that they need more current on demand.
The VS circuitry does just that. As such, they are rated higher and can stand the electrical stress without burning out. It is not theatricks.
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post #10 of 12 (permalink) Old 01-02-2015, 11:05 AM
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Quote:
Originally Posted by Cherryville Chuck View Post
Maybe Bosch decided to post a power rating that was a little more honest than everyone else. Compare the 15 amps to the other manufacturer's 15 amp motors Tom.
If that's the case, why not correct the published ratings of their other routers?

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

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Last edited by Dmeadows; 01-02-2015 at 12:01 PM.
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