I am trying to make a gear puller for my Bosch 36 V cordless drill motor. I must use that motor with a different gear. A DeWalt 18 V right angle drill motor gear will be used in its place.
I would really rather buy a gear puller. Is there anything for pulling small DC motor gears off?
If not. Is there an easy way to make a small gear puller like that?
Thanks.
Sure, visit just about any RC vehicle parts site and you will find pullers for small stuff.
A short section of heavy wall tubing (round or rectangular) can make up the frame/body of a small puller, by adding a slot at one side, and a tapped hole located 180 degrees from the slot. I've seen small round frames that have a flat cut from the OD where the slot is located to allow the "jaws" (now tapered) to fit behind a gear with very little clearance space behind it.
A locking shaft collar (setscrew type) will make a sturdy frame, and already has a tapped hole.
Add a screw to fit the tapped hole.. bazinga, a small gear puller/miniature screw press.
Filing/grinding the tip of the screw, or better yet, reducing the diameter of it to slightly smaller than the motor shaft size in a lathe, and the gear will pull off almost effortlessly. If the fabricated frame is durable, it may be worthwhile to make more screws with other tip sizes for other purposes.
In the R/C world, the small gear on the motor shaft is referred to as a pinion. If you search for "pinion puller", you'll get lots of useful information. Here's a picture from one of the hits:
Like the nut cracker I made several years ago from a piece of 2" heavy wall tube, drilled and tapped 1/2 - 13 for an extraneous hood pin. Eventually the threads on the hood pin wore out so I substituted a high quality (#5, #8) bolt; it is still in service. much less damage to the kernel. Gerry :-)} London, Canada
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replying to John Doe, finalkit wrote: GOOGLE.COM
replying to John Doe, finalkit wrote: GOOGLE.COM
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