Author Topic: Spur and pinion for RC truck the analog way  (Read 3332 times)

Offline tapkoote

  • Jr. Member
  • **
  • Posts: 7
  • Country: us
Spur and pinion for RC truck the analog way
« on: March 10, 2016, 11:41:38 AM »
I offered to cut some gears for my buddies truck.
Itís been many years since Iíve done it and had to retrieve the indexer and instructions from the dust. It took a bit to retrain my brain and test on some plastic scrap.
The original ratio was 16/48. or 3 to1
My cutters are 20P- just to make the math easy.
In order to hit the gear diameters Iíd have  19/56 or 2.5 to 1.
He said that it be fine. But I had to order a #6 cutter. Since I wanted to get this done, before next years snow, I ordered one off flea bay, even though it was 1 inch bore.
 I found in my little gear cutting box a one inch arbor that hadnít been finished.Some how 20 years ago I thought I might need one-I guess? I put it in the lathe and sized the clamping end. Fit a collar and a drive pin.

I hacked up a piece of aluminum plate, drilled some holes,spun it into a gear blank, which fits the drive dog.
I'll add more later.....


« Last Edit: March 17, 2016, 11:01:40 PM by Brass_Machine »
Trouble Shooting:
If you can't fix it with a hammer,
It's an electrical problem.

Offline tapkoote

  • Jr. Member
  • **
  • Posts: 7
  • Country: us
Re: Spur and pinion for RC truck the analog way
« Reply #1 on: March 17, 2016, 03:57:03 PM »
Got started on a slow tortious journey towards new gears.
Since the drill press isn't built for side loads, my cutter acts as a one tooth cutter.


« Last Edit: March 17, 2016, 11:02:49 PM by Brass_Machine »
Trouble Shooting:
If you can't fix it with a hammer,
It's an electrical problem.

Offline tapkoote

  • Jr. Member
  • **
  • Posts: 7
  • Country: us
Re: Spur and pinion for RC truck the analog way
« Reply #2 on: March 17, 2016, 07:34:55 PM »
I learned something about those multi tooth cutters.
Higher spindle speed, and they behave better.
Went from 480 rpm to 2175 rpm.
Much nicer.


« Last Edit: March 17, 2016, 11:03:35 PM by Brass_Machine »
Trouble Shooting:
If you can't fix it with a hammer,
It's an electrical problem.

Offline Brass_Machine

  • Administrator
  • Hero Member
  • *****
  • Posts: 5338
  • Country: us
Re: Spur and pinion for RC truck the analog way
« Reply #3 on: March 17, 2016, 11:04:05 PM »
I embedded the Youtube videos for you.

Eric
Science is fun.

We're all mad here. I'm mad. You're mad.

Offline tapkoote

  • Jr. Member
  • **
  • Posts: 7
  • Country: us
Re: Spur and pinion for RC truck the analog way
« Reply #4 on: March 17, 2016, 11:10:30 PM »
Thank You Eric
If I wasn't so old and cranky, I'd learn the language of computers.
Tonight between the second and third periods of a hockey game-
I cut 18 teeth/spaces in 19 minutes.
Thats more fun than typing. :thumbup:
Trouble Shooting:
If you can't fix it with a hammer,
It's an electrical problem.