Quote:
Originally Posted by David Powell
Search though I might I have failed to find a definitive formula, I do remember that every inch of width of flatbelt will safely transmit a given horsepower depending on the surface speed of the driving pulley. with a maximum limit.
My small Southbend lathe has a 1inch wide flatbelt driving it and it will , providing it is fairly tight, transmit all my I hp motor will put out.
I seem to remember that a rule of thumb for 4 ft 6 flywheels at about 150 rpm is that one inch width of belt will safely transmit up to 10 brake horse power.
It is over 50 years since I saw Boadicea. I seem to remember she had about 8inches of belt width on the flywheel.
Please can anyone give more information about this formula.
Regards David Powell.
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rule of thumb for flat belts i was told was 10hp per inch width hence a 5 inch belt 50bhp, 6 inch 60bhp etc, giving a saftey factor built in when you look at a large showmans like the leader with an 8 inch belt putting out 500 amps at max chat.
sawing on a large rack bench would be considerably more hard work than a steady load like threshing which a 54 inch would be about 25 bhp, with a baler or chaff cutter added that would run up to 35 or 40 bhp but again on the belt and well within the normal working limit of the engine.