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Mechanical free energy devices => mechanic => Topic started by: antimony on December 01, 2016, 02:32:11 PM

Title: Diy motor coupling?
Post by: antimony on December 01, 2016, 02:32:11 PM
Hi I have a problem with a coupling between a small dc motor, and a shaft.
I am out of ideas, and I would like to ask you if you have any ideas with how to couple?
Title: Re: Diy motor coupling?
Post by: citfta on December 01, 2016, 03:41:30 PM
If both shafts are the same size I have used some tubing and hose clamps to connect the motor to a load.  Lowe's sells some tubing in different sizes that looks like clear plastic with some criss-crossed fiber strands in it.  I have had pretty good luck using that for small motors and  loads.  The advantage of this is the motor and load don't have to be lined up exactly since the hose has some give to it.
Title: Re: Diy motor coupling?
Post by: antimony on December 01, 2016, 04:23:39 PM
If both shafts are the same size I have used some tubing and hose clamps to connect the motor to a load.  Lowe's sells some tubing in different sizes that looks like clear plastic with some criss-crossed fiber strands in it.  I have had pretty good luck using that for small motors and  loads.  The advantage of this is the motor and load don't have to be lined up exactly since the hose has some give to it.

The motor i am going to use is from an old battery driven hand drill, and it has a cog on the shaft.
I have thought about heating up the cog, and trying to remove it like that, but what I am left with then is a small, short pin, so it's probably best to leave it on.

I will try to use a hose clamp to clamp some rubber tubing to the cog like you said.

Thanks for the advice.  :)
Title: Re: Diy motor coupling?
Post by: antimony on December 02, 2016, 10:05:11 AM
I tried the hose clamp thing, and i think it can work. Thanks.

With small motors it is not such a good idea to heat them up like that.

It is best to use a press or pin tool.

I have made those out of old pliers before, a little bit of a cumbersome thing but you only need to cut a groove in one side of the pliers so that the motor shaft fits through it,, then use an appropriate size pin to push the motor shaft through the gear\cog.

http://www.instructables.com/id/Cheap-and-Simple-Gear-Puller/

I will check this out, but i am hesitant to pull it off becouse then i will be left with a very tiny pin. About 10 mm long, and maybe a couple of millimeters in diameter.

Thanks, :)
Title: Re: Diy motor coupling?
Post by: BaxBax on January 02, 2017, 11:04:31 PM
Hi. New here.  stumbled on this thread thinking it was about something else but thought I might be able to help. Unsure if my 2 cents worth means anything but eBay have many couplers that adapt to different size shafts that use grub screws to clamp onto said shafts.  I have used them to couple
DC motor shafts to the shafts of my PM generators  to test output and they work well.
Hope I,ve helped in some way.
Bax