belt to chain

[xtruckerbob]

Does anyone know if there is a conversion to change belt pulley to chain sprocket drive on a 3pt mower?

 

[Don87]

Does anyone know if there is a conversion to change belt pulley to chain sprocket drive on a 3pt mower?

Belts are designed to slip a little under too much pressure. If you change to gear and chain, you will more than likely break your chain every time you use it. Especially on starting of the deck, lot's of torque there.

 

[xtruckerbob]

Thanks Don87
Now guess I will sit back and do some rethinking.

 

[pjbci]

I kinda in agreement with don. You need a little slippage. You could easily convert it to a 50 or 60 size chain that wouldnt break but something else more expensive under there probaly would break.

 

[xtruckerbob]

My project was a 48" finishing mower that rusted out. I made a new deck 60" but only used the 2rotors from the old deck and replaced the 24" blades with 30". The 9" pulley that drives the deck needs to be changed because my ratio is wrong. (I did not leave room for larger pulley) When ever I try to mow the the belt will slip. Since the chain is not a good idea I will just add another rotor. I think when I go back to the small 20" blades itshould cut fine.

 

[pjbci]

Could you change to a wider belt size to reduce slippage? Might be easier to change pulleys than adding another blade drive. Are you using an "A" width or "B" belt?

 

[CliffordK]

A bigger belt, or perhaps a pair of belts.

I'm not sure about the acceleration and slippage. Certainly there are many gear driven PTO products.

Perhaps you could use a spring loaded tensioner pulley on the pulling part of the chain. Give it a stiff spring, and expect the spring to take up some of the torque.

 

[RickB]

A bigger belt, or perhaps a pair of belts.



Perhaps you could use a spring loaded tensioner pulley on the pulling part of the chain.

One good solution and one very bad one.

 

[CliffordK]

There would have to be a good way to reduce the shock to the system.

Many transmission clutches have springs to reduce the shock to the system. It should be easy enough to apply the same principle to the PTO shaft. There are, of course, also PTO shafts with built in torque limiting clutches.

 

[Baby Grand]

Chain drives typically operate at lower speed/higher torque than belt drives do.
They also require lubrication to avoid rapid wear & failure. Stick with the belts.
I'd go with either pjbci's idea to use a wider belt, or Cliff's double sheave idea, if there's enough space.