Author Topic: Rubber Pads for Gnerator Mount  (Read 15818 times)

Dave

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Rubber Pads for Gnerator Mount
« on: April 12, 2011, 12:17:34 AM »
I had cut some rubber pads out of a welcome mat for the generator mount that are about 1/4" thick. It's still shakes the barn pretty bad. I have read most people use 1" thick pads.

Does anybody know where I can get pads 1" thick that won't compress with the weight of a 24/2 with gen head?

I am guessing it's about 2200lbs.

Dave

Horsepoor

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Re: Rubber Pads for Gnerator Mount
« Reply #1 on: April 12, 2011, 06:02:37 AM »
Layers of half inch thick horse barn stall mats. Cut with sawsall or skill saw. Cheap and effective.
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Tom

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Re: Rubber Pads for Gnerator Mount
« Reply #2 on: April 12, 2011, 05:50:15 PM »
Shakes the barn? Please don't tell us it's on a wood floor.  :police:
Tom
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Dave

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Re: Rubber Pads for Gnerator Mount
« Reply #3 on: April 12, 2011, 10:38:55 PM »
I call it a barn. It's actually a work shop with a concrete floor and cinder block walls.

I have a tractor supply not too far from here. I will look there for the stall mats.


lionspaw

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Re: Rubber Pads for Gnerator Mount
« Reply #4 on: April 17, 2011, 03:26:25 AM »
I mounted my Lovson 12/1 on a 3"x3"x1/4" angle frame, welded concrete bolts to the underside of the angle, built a 3'x5'x16" box filled it with concrete, sunk the angle iron with the 8 welded bolts in the concrete flush with the top. This was mounted on top of a 1/2" rubber horse pad, 4'x6' i think. I can put a glass of water on top of the engine and leave it there all day. There is NO ground bounce or transfer of sound thru the concrete. anyone interested, i can send pictures and a better description. it did make a big difference. hope this helps.......
LOVSON 12/1, TS 5.0 Generator

Combustor

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Re: Rubber Pads for Gnerator Mount
« Reply #5 on: April 17, 2011, 01:09:59 PM »
Lionspaw has done first what a lot of people ended up doing, and mounted his whole unit on plenty of mass, as R. A. Lister recommended over 70 years ago. If your motor and base,gen etc, are floating then all attached ancillaries need to be mounted remotely on flexible connections or engine movement/vibration will flog them loose and cause much expensive grief. Not many alternators will survive vibration for more than a short time. Perhaps OK for short term standby runs, but not a long term solution,
                                                                                                                                                                                                        Regards,  Combustor.
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Apogee

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Re: Rubber Pads for Gnerator Mount
« Reply #6 on: April 17, 2011, 05:34:54 PM »
Lionspaw,

I'd be great if you posted pics and more details if possible.

Sounds like a nice system.

Thanks,

Steve

Ratman

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Re: Rubber Pads for Gnerator Mount
« Reply #7 on: April 18, 2011, 01:20:39 PM »
Lionspaw,

I'd be great if you posted pics and more details if possible.

Sounds like a nice system.

Thanks,

Steve

I'd like to see some pictures too please. Thanks. Rob  :)
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Roark

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Re: Rubber Pads for Gnerator Mount
« Reply #8 on: April 19, 2011, 02:50:57 PM »
Add my vote to the "pictures please" ticket!

I'm looking at doing something similar and would love to see what has worked for others.

Roark
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cgwymp

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Re: Rubber Pads for Gnerator Mount
« Reply #9 on: April 20, 2011, 02:10:23 AM »
I've been waiting to use this....

Listeroid 8/1

needenginerunnin

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Re: Rubber Pads for Gnerator Mount
« Reply #10 on: April 20, 2011, 03:56:16 AM »
morning
add me to the list, thinking of doing the same.
pictures pretty please ;D

needenginerunnin
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Chaz

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Re: Rubber Pads for Gnerator Mount
« Reply #11 on: April 23, 2011, 10:06:56 PM »
Add me to the list.........
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camillitech

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Re: Rubber Pads for Gnerator Mount
« Reply #12 on: August 29, 2011, 05:45:15 PM »
I mounted my Lovson 12/1 on a 3"x3"x1/4" angle frame, welded concrete bolts to the underside of the angle, built a 3'x5'x16" box filled it with concrete, sunk the angle iron with the 8 welded bolts in the concrete flush with the top. This was mounted on top of a 1/2" rubber horse pad, 4'x6' i think. I can put a glass of water on top of the engine and leave it there all day. There is NO ground bounce or transfer of sound thru the concrete. anyone interested, i can send pictures and a better description. it did make a big difference. hope this helps.......

Apart from the rubber mat that's exactly how I did my first SR1

Then a man who's been installing Lister's since Adam was a lad showed me an easier way  ;D The danger with this method being that you really have to be spot on with your measurements. What the Lister chap does is to cast the base (1 ton for a single and 2 ton for a twin/triple) with 2" plastic soil pipe where the mounting bolts go. Then before the concrete cures remove the 6 pipes, when it has cured you drop long M12 studs down the holes with nuts and washers on or even just bent at the ends. The you position 'Mr Lister' onto the studs, put the nuts on loosely and pour in a cement grout.



This is my ST2 running with a coin on the rocker box, a rubber mat really is not required, as has been pointed out the secret is in the mass as RA Lister recommended.

I have done at least four SR and ST2s this way, long term any flexibility will work harden your copper wires, internal fuel lines and break your exhausts.

Cheers, Paul 
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dieselgman

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Re: Rubber Pads for Gnerator Mount
« Reply #13 on: August 29, 2011, 07:23:53 PM »
Solid mounting is indeed preferred for stationary installations... rubber mounts became the norm for portable sets where one has to isolate and tame some of the vibration but cannot cart around an extra ton or more of concrete mass.

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bschwartz

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Re: Rubber Pads for Gnerator Mount
« Reply #14 on: August 29, 2011, 11:26:47 PM »
I would expect an ST2  to run as smooth as silk in that configuration.  My 6/1 listeroid a 650 RPM however is a different story.
Two cylinder 1800 vs. one cylinder 650 = no contest.

It doesn't jump, but 1 cubic yard of concrete on a stall mat, and you can still feel thumping in the ground.
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