Gas powered jointer?

[hamish]

A question for the woodworkers here.........

I know years ago they were prevalent, I recently acquired a General 6" jointer without a motor, that I would like to run from a gas motor. From what I have found the cutterhead should turn in the 4-5K rpm range, but I am wondering how many "gas" HP it would need to run it.



Or would I be better off to another electric motor and just run it off the generator?

 

[chads]

Generally they run about 4k rpm and a gas motor peaks at about 3.5 k so you would need to figure for that when getting a pulley.
I would highly recomend running the motor at 1/2 speed and using a larger pulley alot quieter that way.
I would think a 3 hp would be good enough at full speed and 4-5 hp at half speed, but trial and error would come into play a little.
Also if your running it at roughly 1/2 speed a flywheel would help a lot.

It would be about right if you had about 1 hp per 6" of cutterhead w/electric.
Seems like gas would be about 50-65% of rated output compared to a electric since they are not as efficient when older or not tuned just right.

If you need power for other stuff you could go the genertor route but those are really loud. I would think that a 4000-6000w would work on a 1 hp
They usually have a 6-10 hp on them and suck some gas.

If your inside watch the co2.

Chad

 

[qbilder]

Generally they run about 4k rpm and a gas motor peaks at about 3.5 k so you would need to figure for that when getting a pulley.
I would highly recomend running the motor at 1/2 speed and using a larger pulley alot quieter that way.
I would think a 3 hp would be good enough at full speed and 4-5 hp at half speed, but trial and error would come into play a little.
Also if your running it at roughly 1/2 speed a flywheel would help a lot.

It would be about right if you had about 1 hp per 6" of cutterhead w/electric.
Seems like gas would be about 50-65% of rated output compared to a electric since they are not as efficient when older or not tuned just right.

If you need power for other stuff you could go the genertor route but those are really loud. I would think that a 4000-6000w would work on a 1 hp
They usually have a 6-10 hp on them and suck some gas.

If your inside watch the co2.

Chad

Great response.

 

[hamish]

I have a 7hp Kohler and with its torque curve I should be good at 2700rpm. Noise is not an issue as the motor on my mill makes alot more noise and its a honda, besides thats what ear protection if for. If my neighbours can hear it running that means they are tresspassing so a non issue.

My EU2000i can run and start a 1hp 120V 15amp motor, so using the generator might be the more economical route to go.

Think I will try an adjustable shave pulley on the planer and try it out with the gas engine.

Thanks!

 

[chads]

If your 2000 will pull it it would be pretty easy to run off electric.

If you already have the engine (and a big one for the application) I guess that will help your decision considerably.
I have a hard time passing up something I already have that will work.

I once put a 13 hp motor on a log splitter worked great even at little above idle.
let us know how it works.
Chad

 

[gene1605]

gas engine

Most electric motors turn 1740 rpm or 3450 rpm, a 3 hp gas engine will equal about 2 elect hp. and have a goverend speed of 3600 rpm and will turn a mutch faster rpm with no problem, just keep the cooling fins clean and the crank case full of clean oil.
Gene

 

[Sawyer Rob]

Every jointer i've owned has had a 3450rpm motor on it, my 8" Delta has an "honest" 2hp electric motor on it, and it has plenty of power. If i was switching it to gas, i'd put a 5hp on it, as pretty much all of the little gas motors are over rated these days.

Rob

 

[poleframer]

Howdy Hamish, sounds like you're off grid too. My hydro/solar and inverters work well up to about 1/2 horse cap.motors, or stuff like grinders.
Here's what I did for the more power hungry tools in my off grid shop. Instead of firing up my miller genset, I have a 12hp kubota outside, runs either an alternator, or hydraulic pump.
I run a big old sebastian 15x60 metal lathe, a small milling head, a belt/disk grinder, a 30" bandsaw, a couple presses, or a power hammer off of hydraulic motors. Use flow control valves for fine speed control, most of the time I have plenty of power running at mid range on the engine.

Use small hydraulic motors, smaller lines will do better. I plumbed my shop with steel hyd. tubing, with hoses to the valves and machines.

 

[hamish]

Howdy Hamish, sounds like you're off grid too. My hydro/solar and inverters work well

Yes I severed ties with the hydro monolpoly. Still cant justify the cost of solar on a large scale, have a 30watt panel to help keep things flowing. Mainly use Honda generators, my eu1000 and eg3500 for the shop and laundry days (with a one year old about every 3 day now). Cost wise I have found using my generator anytime it runs to power a battery charger, my truck driving to work and back, or my lil gas engine coupled to a alternator keeps my batteries charged and good to go for alot less cost than even thinking about solar.Where i am over half the hydro bill is charges and taxes. Without even using any "real" hydro my bill with 0 consumption is more than what I pay currently during the darker winter months in fuel for the generator. If i need to get up at 2:17 am I can still hit the light switch and the lights come on..............no idea why I stuck with "real"hydro for so long.