Feasability study
 

There are occasions when it would be handy to have a portable piece
of equiptment that is used at a remote worksite that is capable of being
run from a 12VDC or 24VDC power source. I am aware that there
are dc to ac power inverters but the ones i have looked at are pricey
once you get into 5kw range. A portable generator is not desirable
for my needs. High torque low voltage DC motors from industrial
supply houses are cost prohibitive. I was pondering using a automotive
starter motor for say running a small compressor, horizontal bandsaw,
drill press etc.

This unit looks like it can be modified to accept a pulley by
removing the bendix.

http://www.ebay.com/itm/370868870946

Anybody try this appoach?
Results?

The max run time on the motor would be 5 to 10 min at
a time. Will there be any issues with over heating the
motor?

TIA.

Best Regards
Tom.
--
http://fija.org/


--
http://fija.org/

Feasability study
 

On 2014-03-20, azotic wrote:
There are occasions when it would be handy to have a portable piece
of equiptment that is used at a remote worksite that is capable of being
run from a 12VDC or 24VDC power source. I am aware that there
are dc to ac power inverters but the ones i have looked at are pricey
once you get into 5kw range. A portable generator is not desirable
for my needs. High torque low voltage DC motors from industrial
supply houses are cost prohibitive. I was pondering using a automotive
starter motor for say running a small compressor, horizontal bandsaw,
drill press etc.

This unit looks like it can be modified to accept a pulley by
removing the bendix.

http://www.ebay.com/itm/370868870946

Anybody try this appoach?
Results?

The max run time on the motor would be 5 to 10 min at
a time. Will there be any issues with over heating the
motor?

Automotive starters can only run for a very short time, 15 seconds to
a minute. After that they overheat.

i

Feasability study
 

Ignoramus28555 fired this volley in
:

Automotive starters can only run for a very short time, 15 seconds to
a minute. After that they overheat.

If you can find a CASE brand "starterator", they are rated for continuous
duty. They won't have as much torque as a starter-only motor, but
they'll run off 12VDC indefinitely. I know of no 24V version.

But why modify junk? There are tons of universal motors out there in
those voltage ranges. And why cobble something up by hacking a good
device when you can just buy the motor for the purpose?

Have you considered DC servo motors? They're not free, but pretty cheap
on the surplus and pull-out market. I have three HONKIN' big ones from a
Bridgeport R2E4 CNC mill I'll sell you for $600 for all three.

Lloyd

Feasability study
 

"Ignoramus28555" wrote in
message ...
On 2014-03-20, azotic wrote:
There are occasions when it would be handy to have a portable piece
of equiptment that is used at a remote worksite that is capable of
being
run from a 12VDC or 24VDC power source. I am aware that there
are dc to ac power inverters but the ones i have looked at are
pricey
once you get into 5kw range. A portable generator is not desirable
for my needs. High torque low voltage DC motors from industrial
supply houses are cost prohibitive. I was pondering using a
automotive
starter motor for say running a small compressor, horizontal
bandsaw,
drill press etc.

This unit looks like it can be modified to accept a pulley by
removing the bendix.

http://www.ebay.com/itm/370868870946

Anybody try this appoach?
Results?

The max run time on the motor would be 5 to 10 min at
a time. Will there be any issues with over heating the
motor?

Automotive starters can only run for a very short time, 15 seconds
to
a minute. After that they overheat.

i

http://www.surpluscenter.com/Electri...OR-10-1839.axd

Feasability study
 

Starters are designed for high output and short cycle. the opposite of
what you're after. You need continous duty.

look to surplus center or fleabay for cheap DC motors. Scrap golf
carts are another great source.

Karl

Feasability study
 

On 20/03/14 09:04, azotic wrote:
There are occasions when it would be handy to have a portable piece
of equiptment that is used at a remote worksite that is capable of being
run from a 12VDC or 24VDC power source. I am aware that there
are dc to ac power inverters but the ones i have looked at are pricey
once you get into 5kw range. A portable generator is not desirable
for my needs. High torque low voltage DC motors from industrial
supply houses are cost prohibitive. I was pondering using a automotive
starter motor for say running a small compressor, horizontal bandsaw,
drill press etc.

This unit looks like it can be modified to accept a pulley by
removing the bendix.

http://www.ebay.com/itm/370868870946

Anybody try this appoach?
Results?

The max run time on the motor would be 5 to 10 min at
a time. Will there be any issues with over heating the
motor?

TIA.

Best Regards
Tom.
A more likely candidate would be some of the Bosch GPA series motors as
they're continuous duty rated 12V and 24V and upto 750W. A couple of
part numbers are 24V 750W 0 130 302 001 and 0 0130 302 013 which might
enable you to find and vehicle application so you might find one 2nd hand.

Feasability study
 

"Karl Townsend" wrote in message
...
Starters are designed for high output and short cycle. the opposite
of
what you're after. You need continous duty.

look to surplus center or fleabay for cheap DC motors. Scrap golf
carts are another great source.

Karl

Broken power wheel chairs would be an excellent parts source if it
weren't for government policies that can leave people dependent on
grey-market repairs. I fixed them for a while, but wouldn't touch one
now without an employer's insurance policy to protect me from
liability.

https://www.aahomecare.org/press/med...mited-mobility

Feasability study
 

"Jim Wilkins" wrote in message
...

Broken power wheel chairs would be an excellent parts source ...

Here'a another good idea from the mobility industry:
http://www.bruno.com/vehicle-lift-curb-sider.html

A do-it-yourselfer could omit the electrics and use a boat trailer
winch to lift generators and air compressors into the SUV. I maximized
the lift height of my truck bed crane by fitting a pulley into the end
of the boom.

Feasability study
 

On Thu, 20 Mar 2014 02:04:48 -0700, "azotic"
wrote:

There are occasions when it would be handy to have a portable piece
of equiptment that is used at a remote worksite that is capable of being
run from a 12VDC or 24VDC power source. I am aware that there

What source would you use, your truck?


are dc to ac power inverters but the ones i have looked at are pricey
once you get into 5kw range. A portable generator is not desirable
for my needs. High torque low voltage DC motors from industrial
supply houses are cost prohibitive. I was pondering using a automotive
starter motor for say running a small compressor, horizontal bandsaw,
drill press etc.

What, specifically, do you want to run? What voltage, current, etc?

You can power a compressor with a lawnmower (or other cheap German)
engine. http://tinyurl.com/ow26frz and
http://tinyurl.com/pwfta67


I have a parallel bar setup to make a portable drill into a drill
press. Like this: http://tinyurl.com/pmvuakz

I think a 1kw inverter will run a HF 8" drill press (2/5hp)

Have you considered a used generator?

How about gas powered tools, both 2 and 4-stroke? I've seen them
converted to drive damnear anything, such as...
http://tinyurl.com/yagk22g
http://tinyurl.com/qjzcyqm


This unit looks like it can be modified to accept a pulley by
removing the bendix.

http://www.ebay.com/itm/370868870946

Anybody try this appoach?
Results?

The max run time on the motor would be 5 to 10 min at
a time. Will there be any issues with over heating the
motor?

Yes, I'm sure there will be problems. They're designed for maximum
power for short periods of time. Crank one for over a minute and they
start getting really hot, even without a load.

--
The most decisive actions of our life - I mean those that are most
likely to decide the whole course of our future - are, more often
than not, unconsidered.
-- Andre Gide

Feasability study
 

On Thu, 20 Mar 2014 07:29:51 -0400, "Jim Wilkins"
wrote:


"Ignoramus28555" wrote in
message ...
On 2014-03-20, azotic wrote:
There are occasions when it would be handy to have a portable piece
of equiptment that is used at a remote worksite that is capable of
being
run from a 12VDC or 24VDC power source. I am aware that there
are dc to ac power inverters but the ones i have looked at are
pricey
once you get into 5kw range. A portable generator is not desirable
for my needs. High torque low voltage DC motors from industrial
supply houses are cost prohibitive. I was pondering using a
automotive
starter motor for say running a small compressor, horizontal
bandsaw,
drill press etc.

This unit looks like it can be modified to accept a pulley by
removing the bendix.

http://www.ebay.com/itm/370868870946

Anybody try this appoach?
Results?

The max run time on the motor would be 5 to 10 min at
a time. Will there be any issues with over heating the
motor?

Automotive starters can only run for a very short time, 15 seconds
to
a minute. After that they overheat.

i

http://www.surpluscenter.com/Electri...OR-10-1839.axd

Duty: Intermittent. (just like a starter motor)

--
The most decisive actions of our life - I mean those that are most
likely to decide the whole course of our future - are, more often
than not, unconsidered.
-- Andre Gide

Feasability study
 

On 3/20/2014 6:03 AM, Ignoramus28555 wrote:
On 2014-03-20, wrote:
There are occasions when it would be handy to have a portable piece
of equiptment that is used at a remote worksite that is capable of being
run from a 12VDC or 24VDC power source. I am aware that there
are dc to ac power inverters but the ones i have looked at are pricey
once you get into 5kw range. A portable generator is not desirable
for my needs. High torque low voltage DC motors from industrial
supply houses are cost prohibitive. I was pondering using a automotive
starter motor for say running a small compressor, horizontal bandsaw,
drill press etc.

This unit looks like it can be modified to accept a pulley by
removing the bendix.

http://www.ebay.com/itm/370868870946

Anybody try this appoach?
Results?

The max run time on the motor would be 5 to 10 min at
a time. Will there be any issues with over heating the
motor?
Automotive starters can only run for a very short time, 15 seconds to
a minute. After that they overheat.

i
Heard that.
But isn't that because they are basically 6 volt motors running on 12 volts?

Feasability study
 

On Thu, 20 Mar 2014 13:46:08 -0500, Richard wrote:

On 3/20/2014 6:03 AM, Ignoramus28555 wrote:
On 2014-03-20, wrote:
There are occasions when it would be handy to have a portable piece of
equiptment that is used at a remote worksite that is capable of being
run from a 12VDC or 24VDC power source. I am aware that there are dc
to ac power inverters but the ones i have looked at are pricey once
you get into 5kw range. A portable generator is not desirable for my
needs. High torque low voltage DC motors from industrial supply houses
are cost prohibitive. I was pondering using a automotive starter motor
for say running a small compressor, horizontal bandsaw, drill press
etc.

This unit looks like it can be modified to accept a pulley by removing
the bendix.

http://www.ebay.com/itm/370868870946

Anybody try this appoach?
Results?

The max run time on the motor would be 5 to 10 min at a time. Will
there be any issues with over heating the motor?
Automotive starters can only run for a very short time, 15 seconds to a
minute. After that they overheat.

i
Heard that.
But isn't that because they are basically 6 volt motors running on 12
volts?

No. They're basically 12 volt motors that are designed for exactly the
service that they usually provide: brief periods of operation at high
torque, in between long periods of time where all they do is add weight
and cost to the vehicle without contributing to its function.

(Well, and for being as cheap as humanly possible while still getting the
job done.)

Operating one at 6V (or at lower torque output demands) may allow it to
work longer, but it almost certainly won't be as good for a long-duration
task as a motor that's designed specifically for continuous use at 6V.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Feasability study
 

On 3/20/2014 2:04 AM, azotic wrote:
There are occasions when it would be handy to have a portable piece
of equiptment that is used at a remote worksite that is capable of being
run from a 12VDC or 24VDC power source. I am aware that there
are dc to ac power inverters but the ones i have looked at are pricey
once you get into 5kw range. A portable generator is not desirable
for my needs. High torque low voltage DC motors from industrial
supply houses are cost prohibitive. I was pondering using a automotive
starter motor for say running a small compressor, horizontal bandsaw,
drill press etc.

This unit looks like it can be modified to accept a pulley by
removing the bendix.

http://www.ebay.com/itm/370868870946

Anybody try this appoach?
Results?

The max run time on the motor would be 5 to 10 min at
a time. Will there be any issues with over heating the
motor?

TIA.

Best Regards
Tom.
Dad used a starter motor with a flexible shaft and stone to sharpen the
bits on the big circular saw in his portable saw mill. This was in the
late 1940's and early 1950's. I don't think he ever replaced the motor.
Probably a 6 volt motor. And was intermittent.

Current starter automobile starters are probably not useable, as others
have said. However, starter motors, like on my 1997 Dodge diesel pickup
don't run steady for a long time. I have had to replace the solenoid
contacts because the arcing eroded them. That has been the only problem.
As I recall, that motor is a 12 HP starter.

Find a truck starter and try it.

Paul

Feasability study
 

On 03/20/2014 04:04 AM, azotic wrote:
There are occasions when it would be handy to have a portable piece
of equiptment that is used at a remote worksite that is capable of being
run from a 12VDC or 24VDC power source. I am aware that there
are dc to ac power inverters but the ones i have looked at are pricey
once you get into 5kw range. A portable generator is not desirable
for my needs. High torque low voltage DC motors from industrial
supply houses are cost prohibitive. I was pondering using a automotive
starter motor for say running a small compressor, horizontal bandsaw,
drill press etc.

Anyone know the voltage of treadmill motors?
If appropriate for this use, used (rescued from discards)
they should be cheap.


technomaNge
--