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I might have to buy a replacement motor for my C&P 8x12 Old Style. Someone recommended http://dealerselectric.com/motor_drive_packages.asp, but I’m not sure on the specific motor to get. It needs to use regular home electricity. Can someone share their recommendations please?
Thank you
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You probably could go with the first one at the top of the page on the link: a .33 HP, 1800 RPM motor with a 115 volt drive. 115 volts is regular house power (technically house power is 120 volts, but that doesn’t matter here). I ran my 8 X 12 C&P with a 1/6 (.17) HP motor off an old water pump, which was half the power that the 1/3 (.33) HP motor above has.
The smaller C&P presses, when well lubricated and when they don’t have anything wrong with them, turn very easily, so the drive motor doesn’t have to be very big. I think people often put larger motors on them than they really need. As I said, I ran my C&P 8 X 12 with a 1/6 HP motor for many years and never had any trouble. I suppose if you were always printing from plates with a large amount of ink coverage, you might need a bigger motor, but you shouldn’t be doing that anyway. The most amount of ink coverage you should have, should be about 1/4 to 1/3 of the total chase area. In other words, if you were to take all of the area which actually prints, and push it all together into a solid block of print with no white in it, that area should not be more than 1/4 to 1/3 of the total area of the chase. But I’m getting off the subject……
I don’t know how you are driving the press (with a belt to the flywheel, or a belt to a pulley, or friction drive, etc), but it would be better to run the motor with as small a pulley as possible so that it ran at a higher RPM. Ideally, when the press is running at the fastest you would ever want to run it, the motor should be running close to its 1800 RPM top speed.
I will be interested to see the other replies you will get to your query as well.
I just got done setting up my 8x12 C&P Using the .33hp 1200 rpm brook motor and Teco VFD from dealers electric. I mounted the vfd in an enclosure to keep oil and dust out. I also ran a remote start stop and speed control under the delivery board. I am running an 18.75in diameter pulley on the press and a 1.5 in pulley on the motor. If you are running off the flywheel the 1800 rpm motor should be fine.
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Thank you very much for the feedback guys.
asblee77, your setup looks great. Thanks for the comments.