Shaft Conversion for PTO Generator

[dex3361]

You will need to get a frequency meter to get it to the right RPM. Here is a cheap frequency meter.

 

[Soundguy]

get a step up gearbox like many pto gensets use..

with only 150$ in it.. consider that a deal on the head only and get rid of the rub goldberg pulley deathtrap..

 

[bcp]

This is what the calculator says you have now:



To get 3600 RPM on the 2.5 pulley with a 540 PTO, you need a large diameter of 16.6...



I would prefer a gearbox instead.

The pulleys measure as follows:

Large = 7" (roughly 175mm)
Small = 2.5" (roughly 60mm)

That's the issue right? If the PTO generator calls for 3600rpm's and the tractor is a rear 540, I need a larger ratio between the two pulleys. It seems to make sense why the volts are only reading 100 or so.

Any brilliant ideas? Like, sell it and buy a different one? I only have $150 into it and it's a Winco. Old but apparently working.

Thanks for all the quick responses

 

[SPYDERLK]

The pulleys measure as follows:

Large = 7" (roughly 175mm)
Small = 2.5" (roughly 60mm)

That's the issue right? If the PTO generator calls for 3600rpm's and the tractor is a rear 540, I need a larger ratio between the two pulleys. It seems to make sense why the volts are only reading 100 or so.

Any brilliant ideas? Like, sell it and buy a different one? I only have $150 into it and it's a Winco. Old but apparently working.

Thanks for all the quick responses

Theres your problem alright. No single stage upgearing of ~ 7:1 is even possible with a 7" major pulley using a V belt. Even if possible it would slip bigtime. You could do it with a small HTD gearbelt and appropriate pulleys. That would be the cleanest mod to the existing setup - not cheap in proportion to your orig cost. You could buy a stepup gearbox for it - even more not cheap.
larry

 

[DieselDon]

This has been a major education session. And I appreciate it.

Just did a bunch of reading on stepup gearboxes. Didn't know what one was until a few hours ago.

I'll be bouncing all this off a friend tomorrow, who knows his stuff. I'll likely pick up a different PTO generator, one that is setup for 540

Thanks again for all the quick help

dp

 

[bcp]

If you sell it, tell the buyer that as it is, it needs about 1285 RPM input to turn 3600 RPM.

 

[SPYDERLK]

If you sell it, tell the buyer that as it is, it needs about 1285 RPM input to turn 3600 RPM.

View attachment 304249

A-aand ... the belt starts smoking well below 5KW.

 

[Soundguy]

as cheap as that job was ( 150? ).. the addition of a few hundred dollar step up gear box would yeild a working pto gen still int he 'very cheap' range..