Pulley speed on John Deere h and b

drastic dave · Oct 2, 2018

Plan on using a h or b to power a meadows grist mill. Factory recommends 600 rpm. Will either tractor work for this?

D- · Oct 2, 2018

If belt driven the H pulley runs half the speed
of the B. There was an oversize adapter to fit an
H pulley.
PTO shafts generally run less than 600.

jdal · Oct 2, 2018

Never tried the H but we've used B, M, even a 60 but the one I like the best is the LA on our 24 inch Meadows Mill. For demonstration purposes it draws a crowd and it make some nice corn meal.

lfnel · Oct 3, 2018

There was no SAE/ASAE standard on belt speed, as I recall. Most run around 3,100 ft/per min. Because of varying diameters of pulleys on tractors, RPM of a tractor's pulley tells you nothing without knowing diameter. I don't think the belt speed on a B & H are much different. On the farm as a kid, we used a B and H interchangeably on a Letz burr mill. HOWEVER, as the belt pulley on an H is on the camshaft, not crankshaft, it runs the opposite direction of most tractors! This is easily accounted for by simply not twisting the belt if using an H. Others, at least JD's, are to run with a twist in the belt.

dan_41jdh · Oct 3, 2018

The belt speeds on all "A"s" and "G"s" was 3270 feet per minute. "B"s" started at 3200 FPM and later models were 3110 FPM. "D"s" started at 3270 and went to 3122 with the 1939 models. Although it had a fairly large diameter, the belt pulley on the "H" rotated at half engine speed, so its rated belt speed was 2245 FPM and with the overpulley mentioned by D- belt speed was increased to 3000 FPM.

PTO speed for early "B"s" was 554 RPM and 541 RPM for later models. The "H" had a PTO speed of 546 RPM.

(All the above information was found in various Field Service Bulletins.)

Pulley speed on John Deere h and b

drastic dave

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D-

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jdal

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lfnel

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dan_41jdh

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