Belt question

rrman61 · Jan 21, 2016

I have a vertical shaft gas engine I would like to mount on my air compressor. How close to the compressor pulley can this engine be mounted when using a v-belt and going from vertical engine pulley to horizontal compressor pulley? It will probably turn around 1600 rpm

Russ from MN · Jan 21, 2016

Because the sheave on the compressor is probably quite large you will have to have the engine a ways away, otherwise the belt won't stay on or last very long. Maybe a properly placed idler would allow you to shorten it up.

cool hand · Jan 21, 2016

A couple of idlers placed so that the belt makes a right angle like on my Cub Cadet lawnmower would let it operate with minimal twisting. On the other hand I recall the V-belt on our old GI (General Implement) corn picker of 65-70 years ago that powered the elevator ran with a full twist to reverse shaft rotation. It worked OK.

ed will · Jan 21, 2016

Hi, I saw a set up similar to what you want with the motor mounted on a frame under the compressor which was on the same table like frame. There were 2 idler pulleys guiding the belt around the 90* bend. Seemed pretty good to me. Ed Will. Oliver BC

Steve@Advance · Jan 21, 2016

Just a thought...

For what you spend on idlers, belt, brackets, time and frustration...

Go to Harbor Freight and buy the right motor.

ericlb · Jan 21, 2016

i agree, you basically have 2 ways to set this up, keep in mind, due to the size difference in the compressor pulley, and the motor pulley if you want to go just the 2 pulleys, one of the units must be on a slotted mount so you can tighten the belt, also the belt needs to contact the motor pulley at least halfway around it or more, otherwise it will slip under load and burn off your belt, probably 3 to 4 feet from the compressor pulley the other way is to use at least one idler pulley to tension the belt, the longest lasting idler pulley would be one designed for a car engine air conditioning system that ran v belts, these have big and replaceable bearings in them, even then keep in mind you want as much of the belt to contact the pulleys as possible, also when finding the right size belt for your set up remember its not just the length, the belt must also be the right width for the pulleys, a v belt does not run in the bottom of the pulley groove, it makes its contact on the sides of the pulley

jeffcat · Jan 21, 2016

Steve just may have it right. Also do you have the throttle kick down and the pilot valve? If you do not have these items it will run full tilt all of the time. Pulleys most time are 3 to 1. Go to HF or another store and take a tape measure with you. Measure things up.

rrman61 · Jan 21, 2016

Regardless of using my existing motor or buying the "right" motor where can I get what it takes to regulate engine speed,etc?tThanks for the advice.bBy the way it has a 5 hp electric motor on it now but I want it portable

rrman61 · Jan 21, 2016

Also running full tilt all the time would be ok if I could practically use some kind of bypass/relief valve?

glennster · Jan 21, 2016

i built one a while ago with a 5hp briggs. the way i figured out the valving and such was to go to farm and fleet and look at a gas compressor. i took down the model and serial number then looked at what parts i needed. then ordered the parts right from farm and fleet. i used a centrifugal clutch on the engine to dis-engage the drive belt whan the engine idles down. if yo try and direct drive the compressor from the engine, i doubt if you could pull the rope hard enough to get er started!!

Den N Ms · Jan 21, 2016

Rrman61 ,Here is the type unloading valve Model ?LGM20? ? Mark II Load Genie? and throttle control ?TC12? Throttle Control that you need.
Compressor Valves

rrman61 · Jan 21, 2016

Great thanks!

ed will · Jan 21, 2016

Hi, I saw a set up similar to what you want with the motor mounted on a frame under the compressor which was on the same table like frame. There were 2 idler pulleys guiding the belt around the 90* bend. Seemed pretty good to me. Ed Will. Oliver BC

Belt question

rrman61

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Russ from MN

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cool hand

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ed will

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Steve@Advance

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ericlb

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jeffcat

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rrman61

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rrman61

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glennster

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Den N Ms

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rrman61

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ed will

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