turning a 1" shaft with a stationary 12v motor

[Mike]

I need to slowly turn a 1" shaft clockwise and counter-clockwiset
with
a small 12v DC motor. The motor doesn't need a lot of torque. The
motor needs to be
stationary and connected to some device that will turn the shaft. I've
looked around
the web and with no success. Any suggestions?

Mike

 

[Michael A. Terrell]

I need to slowly turn a 1" shaft clockwise and counter-clockwiset
with
a small 12v DC motor. The motor doesn't need a lot of torque. The
motor needs to be
stationary and connected to some device that will turn the shaft. I've
looked around
the web and with no success. Any suggestions?

Mike

A newsgroup that deals with mechanical issues would be a good start.

--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Homer J Simpson]

I need to slowly turn a 1" shaft clockwise and counter-clockwiset
with
a small 12v DC motor. The motor doesn't need a lot of torque. The
motor needs to be
stationary and connected to some device that will turn the shaft. I've
looked around
the web and with no success. Any suggestions?

A gearmotor. Allelectronics.com

 

[Jon Slaughter]

I need to slowly turn a 1" shaft clockwise and counter-clockwiset
with
a small 12v DC motor. The motor doesn't need a lot of torque. The
motor needs to be
stationary and connected to some device that will turn the shaft. I've
looked around
the web and with no success. Any suggestions?

How bout just a belt? If it just need to be slow and no torque then using a
rubber band might even work. Although when changing direction there might be
some slipping.

 

[christopher]

I need to slowly turn a 1" shaft clockwise and counter-clockwiset
with a small 12v DC motor. The motor doesn't need a lot of torque.
The motor needs to be stationary and connected to some device that
will turn the shaft. I've looked around the web and with no success.
Any suggestions?

Hello Mike,

If your not wanting to use a stepper motor then a auto Window Motor
might work. It is permanent magnet right angle gear motor. High output
torque for many DC applications. Use a dc voltage controller to adjust
the speed.

SPECIFICATIONS
a.. RPM 150 at 12 VDC no load
b.. Voltage 12 DC
c.. Amps 3-1/2 no load
d.. Reversible
e.. Duty continuous

Good Luck,

* * *
Christopher

Temecula CA.USA
http://www.oldtemecula.com

 

[John Fields]

I need to slowly turn a 1" shaft clockwise and counter-clockwiset
with
a small 12v DC motor. The motor doesn't need a lot of torque. The
motor needs to be
stationary and connected to some device that will turn the shaft. I've
looked around
the web and with no success. Any suggestions?

---
Support the shaft on pillow blocks and drive it with sprockets on
the motor shaft and the shaft and a chain connecting them?

Or put a pinion on the motor shaft and drive the supported shaft
with a mating gear.

 

[James Thompson]

I need to slowly turn a 1" shaft clockwise and counter-clockwiset
with
a small 12v DC motor. The motor doesn't need a lot of torque. The
motor needs to be
stationary and connected to some device that will turn the shaft. I've
looked around
the web and with no success. Any suggestions?

Mike

You don't need torque then just find a piece of rubber hose to mate the
shaft with the motor, use a geared reduction motor to turn it slowly. Also
you can simply strap the motor to a piece of board for the support.

 

[Roger Dewhurst]

I need to slowly turn a 1" shaft clockwise and counter-clockwiset
with
a small 12v DC motor. The motor doesn't need a lot of torque. The
motor needs to be
stationary and connected to some device that will turn the shaft. I've
looked around
the web and with no success. Any suggestions?

You could construct a gearbox using standard parts for models or you might
do it with pulleys and belts. Pulleys could be made to size from wood or
plastic.

R

 

[mark krawczuk]

hi, how about a window wiper motor , or a door glass electric motor from
a car ?


mark k

 

[Bob Masta]

You don't need torque then just find a piece of rubber hose to mate the
shaft with the motor, use a geared reduction motor to turn it slowly. Also
you can simply strap the motor to a piece of board for the support.

Even easier, just slip a small piece of rubber hose over the motor
shaft, and use it as a friction drive against the 1" shaft. You'll
need to be able to apply tension to the motor to control the
friction, easily done with a spring. There are lots of variants
on this scheme. If you can put a rubber tire around the 1" shaft
then the bare motor shaft can drive it. Or use an intermediate
rubber idler. Take apart an old tape recorder to get some parts.
The capstan pressure roller would make a good idler. Many
units have rubber-rimmed driven wheels to try.

Best regards,


Bob Masta

D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, Signal Generator
Science with your sound card!

 

[Michael A. Terrell]

hi, how about a window wiper motor , or a door glass electric motor from
a car ?

Neither of those motors are designed for continuos duty service.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Rich Grise]

Neither of those motors are designed for continuos duty service.

They're also about 10,000% overkill for the OPs original question:
"I need to slowly turn a 1" shaft clockwise and counter-clockwiset with
a small 12v DC motor. The motor doesn't need a lot of torque. ..."

Rat Shack has a cute little "Hobby Motor":
http://www.radioshack.com/product/i...origkw=DC+Motor&kw=dc+motor&parentPage=search
This one's cheaper:
http://www.alltronics.com/cgi-bin/item/94M007/37/12-VDC-Hobby-Motor

although, either of these (or any other similar motor you could find
with a simple google search) might need to be geared down considerably.

Cheers!
Rich

 

[Homer J Simpson]

hi, how about a window wiper motor , or a door glass electric motor
from a car ?

http://www.allelectronics.com/cgi-bin/category/400400/DC_Gear_Motors.html

http://www.allelectronics.com/cgi-bin/item/DCM-276/400/5_RPM_GEAR_MOTOR,_12VDC_.html

5 RPM GEAR MOTOR, 12VDC

Rugged 5 RPM gear motor designed to move baffles in automotive air
conditioning. Ideal for continuous or intermittent use where power, slow
rotation, low noise and low current are desired. Drive mechanism consists of
a small DC motor with a worm gear driving a four gear train. Final drive is
a plastic splined shaft, 0.52" diameter x 0.5" long. The composite plastic
housing is easily opened for access to the motor, gears and electrical
terminals. Overall dimensions of assembly including mounting flanges and
shaft is approximately 3.12" x 4.25" x 1.62." No load measurements: 5 RPM @
13.5 Vdc @ 15 mA.
CAT# DCM-276

Your Price: $9.00 each

 

[jasen]

I need to slowly turn a 1" shaft clockwise and counter-clockwiset
with
a small 12v DC motor. The motor doesn't need a lot of torque. The
motor needs to be
stationary and connected to some device that will turn the shaft. I've
looked around
the web and with no success. Any suggestions?

You're after a small antenna rotator?

Bye.
Jasen

 

[Mike]

Thanks for all the suggestions. The problem I'm having is finding a
gear to fit around the (after I actually measured it) 1.125" shaft.
The largest gear I found had a .98" bore hole. I did find a gear with
the right bore hole but it was steel (a little overkill) at $90. I've
also been looking at cog belts but the same problem, can't find a
matching gear.

 

[Homer J Simpson]

Thanks for all the suggestions. The problem I'm having is finding a
gear to fit around the (after I actually measured it) 1.125" shaft.
The largest gear I found had a .98" bore hole. I did find a gear with
the right bore hole but it was steel (a little overkill) at $90. I've
also been looking at cog belts but the same problem, can't find a
matching gear.

Some of the surplus places sell them. Don't ignore cogbelts and the wheels
for them.

 

[Rich Grise]

Thanks for all the suggestions. The problem I'm having is finding a
gear to fit around the (after I actually measured it) 1.125" shaft.
The largest gear I found had a .98" bore hole. I did find a gear with
the right bore hole but it was steel (a little overkill) at $90. I've
also been looking at cog belts but the same problem, can't find a
matching gear.

Please follow convention and bottom-post, thanks.

Depending on what torque you need, I'd think just a wheel and a
big rubber band for a belt could do the trick, or a wheel with a
rubber "tire" that the motor shaft spins against, a la capstan
and pinch roller

Or, if you get a piece of plastic, and you're handy with tools,
you could make a gear in your workshop.

Good Luck!
Rich

 

[jasen]

Neither of those motors are designed for continuos duty service.

I've seen wipers running for hours on end, but yeah a car that's done
500000km (300000mi) may have only been running for less than a year.

still a wiper motor is likely to outlast a toy motor
or a cheap tool motor.

Bye.
Jasen

 

[jasen]

They're also about 10,000% overkill for the OPs original question:
"I need to slowly turn a 1" shaft clockwise and counter-clockwiset with
a small 12v DC motor. The motor doesn't need a lot of torque. ..."

Wiper motors don't have a lot of torque compared to winch motors...
OP didn't give a figure for "not a lot".

Bye.
Jasen

 

[Michael A. Terrell]

I've seen wipers running for hours on end, but yeah a car that's done
500000km (300000mi) may have only been running for less than a year.

still a wiper motor is likely to outlast a toy motor
or a cheap tool motor.

You think so? A wiper motor is usually mounted where moist air can
blow across it, to help cool it. Do you have any idea how much current
a wiper motor uses, even with no load? Do you have any idea how many
hours a wiper motor is built to run? I have replace three or four that
have failed in the 35+ years that I've been driving, and I never ran the
wipers that much.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida