Re: Stupid (Big) Small Tool Score - SCORE!

Jun 22, 2024 Last reply: 2 years ago 2 Replies
J

I guess I'll find out if newer CH compressors are as good as they used to be. Its a good sign that they have a 7.5 HP motor on their 80 gallon



2 stage upright instead of a 5. Bob La Londe

--------------------------- I compare the measured running Amps to the motor nameplate value and reduce the pulley size if they are higher.



I changed a hydraulic pump that was driven by a gas engine and didn't refigure the pulley ratio, and the belt failed with broken cords on one side, which caused it to roll sideways and slip under load. That was briefly a puzzler.


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B

Yep, reducing the pulley size is how I keep the IR running with its new motor and its working thermal protector.

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J

The CH stuff is not what it used to be and the 5 is REALLY a 3.5 or

3.75 and the 7.5 is an honest 5, in my experience. It took a 5HP current production replacement motor to replace the old 3.5 I had on my compressor.

------------------------- Mine is an 80 gallon Husky that apparently fell over, it had a small base and is very top heavy. I got it for $75 minus the control and compressor head and put an HF replacement on it. The tank claims 7 HP peak, the original motor's label gives 2.98 KW (3.99 HP) and the wattmeter I added shows 2.4 KW (3.2 HP) with a smaller than original pulley.

I'm not suggesting that an air compressor deserves a wattmeter, it serves as a 240V 100A Kill-A-Watt to display power to other things I can plug in for testing such as a 240V Variac.

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