Bearing support shaft

[TheOldHokie]

Correct all the normal sized consumer grade washers that you would get at Home Depot or Lowe’s Have what you call a direct drive pump, meaning the pump attaches directly to the shaft of the engine and and is held on with normally 4 bolts around the flange.
These pumps really don’t last that long because they are spinning at 3600 RPMs, that’s why they’re consumer grade.

On the commercial side, the pumps are driven by V belts, gearbox reduction, or a poly chain.
At the horsepower and torque that the engine I’m looking at is producing (85hp/140tq), the belts are not going to work. A gearbox which has a 2:2.1 ratio will get completely destroyed. The biggest gear box I’ve seen is only rated for up to 31 hp, and I currently use one on my Honda IGX 800 engine.
The black washer sitting in the back of the truck is the first one I built about six or seven years ago. That has a poly chain set up. It’s powered by a 40 hp Kohler and that pump I believe was 10.6 GPM/3625 psi. That engine pretty much gave it all it could to get the maximum effect out of that pump.

in the other two pictures, you’ll see one of my pumps is a direct drive. You see how it bolts directly to the back of the engine. the other two pumps, hand for pump size reference, you see where the sprockets or sheaves attach to the shaft.

Why do you think a synchronous belt wont work? They are capable of way more HP than you have there.

Dan

 

[Floridaman]

Why do you think a synchronous belt wont work? They are capable of way more HP than you have there.

Dan

I just fixed it above. I meant to say the V belts won’t work.

 

[Russell King]

In the larger electric motor world they used multiple v-belts and what was called a jack shaft. The motor was usually mounted on a slide base to tighten the belts. The jack shaft was two pillow block bearings and the shaft (as mentioned above) with sheaves mounted. Sometimes the jack shaft carried multiple sheaves to distribute torque to multiple driven equipment.

You could probably get a lot of assistance from a company named Motion Industries. They naturally sell items dealing with motion and power transmission so generally have a good knowledge of what is available.

https://www.motion.com/

 

[TheOldHokie]

In the larger electric motor world they used multiple v-belts and what was called a jack shaft. The motor was usually mounted on a slide base to tighten the belts. The jack shaft was two pillow block bearings and the shaft (as mentioned above) with sheaves mounted. Sometimes the jack shaft carried multiple sheaves to distribute torque to multiple driven equipment.

You could probably get a lot of assistance from a company named Motion Industries. They naturally sell items dealing with motion and power transmission so generally have a good knowledge of what is available.

https://www.motion.com/

Technically he does not want a jackshaft (aka countershaft). He wants a direct drive extension of the crankshaft to carry the overhanging load of his belt drive. It could look a lot like the jackshaft shown below but with just one sprocket. One end of the shaft would be directly coupled to the crankshaft on the engine. Simple and cheap.

My opinion of Motion Industries as a resource for walk up retail customers is not very high. It has to be a dire emergency to get me through their doors.

Dan

 

[Floridaman]

Ai does some weird things when you ask it to draw something up.
This is the best I can do right now until my “ai credits“ restore tomorrow and allows me to upload more images

the old hokie above has the right idea with his image.

 

[TheOldHokie]

Ai does some weird things when you ask it to draw something up.
This is the best I can do right now until my “ai credits“ restore tomorrow and allows me to upload more images

the old hokie above has the right idea with his image.

Tho a seems pretty simple to me

1. Couple a short (12") shaft to engine crankshaft.
2. Mount a synchronous drive pulley on shaft.
3. Support outboard end of extension shaft with a pillow block.

What am I missing?

Dan