go_away

Author Topic: Good source of 6mm bore miter gears?  (Read 405 times)

0 Members and 1 Guest are viewing this topic.

Offline jwatteTopic starter

  • Supreme Robot
  • *****
  • Posts: 1,343
  • Helpful? 81
Good source of 6mm bore miter gears?
« on: May 19, 2014, 04:58:31 PM »
I'd like to mount a motor with a 6 mm D shaft at a 90 degree angle (or 60-90 degrees, really.)
What's a good solution to transfer the motor power to the wheel? I have one motor per wheel, and need to move the motor out of the hub for space reasons.

I've looked at places like rushgears.com and sdp-si.com, and all the gears they have are $25 each and up -- and I need 10 of them! (It feels weird to pay more for the 90 degree joint than I paid for motor + encoder + gearbox...)

There are some plastic gears at sdp-si that are $6 each, but they are 1:2 and 1:2.5 ratio.

Or is there another choice for a 90 degree coupling than miter gears?

Offline sdk32285

  • Supreme Robot
  • *****
  • Posts: 424
  • Helpful? 0
Re: Good source of 6mm bore miter gears?
« Reply #1 on: May 19, 2014, 05:28:41 PM »
Mcmaster has some spur gears with a 0.25" bore. The nylon ones are $2-4
http://www.mcmaster.com/#miter-gears/=s1en4y

Robots for Roboticists Blog - http://robotsforroboticists.com/

Offline jwatteTopic starter

  • Supreme Robot
  • *****
  • Posts: 1,343
  • Helpful? 81
Re: Good source of 6mm bore miter gears?
« Reply #2 on: May 20, 2014, 02:28:04 PM »
Thanks for the suggestion. Unfortunately, that doesn't solve my problem. First, I need miter gears, not spur gears. But, McMaster also has imperial miter gears in nylon.
Adapting from 6mm to 1/4" is actually very hard, unless you have lots of axial space for a coupling, because there's not enough space for a sleeve type adapter. Just screwing them on a 6mm shaft leaves a 0.35mm difference in concentricity, which is quite significant and jams up the meshing.


Offline venturemfg

  • Jr. Member
  • **
  • Posts: 10
  • Helpful? 0
Re: Good source of 6mm bore miter gears?
« Reply #3 on: May 21, 2014, 06:20:20 AM »
Try out Venture Mfg Co. (http://www.venturemfgco.com/)

Offline jwatteTopic starter

  • Supreme Robot
  • *****
  • Posts: 1,343
  • Helpful? 81
Re: Good source of 6mm bore miter gears?
« Reply #4 on: May 21, 2014, 09:29:42 AM »
I would check out Venture Manufacturing, except their web site 500s :-/

Offline waltr

  • Supreme Robot
  • *****
  • Posts: 1,943
  • Helpful? 98
Re: Good source of 6mm bore miter gears?
« Reply #5 on: May 21, 2014, 11:45:26 AM »
Quote
Adapting from 6mm to 1/4" is actually very hard
It is easier to buy the gear with a smaller hole then open the hole to the required size.

Offline jwatteTopic starter

  • Supreme Robot
  • *****
  • Posts: 1,343
  • Helpful? 81
Re: Good source of 6mm bore miter gears?
« Reply #6 on: May 21, 2014, 04:23:37 PM »
I found some promising injection molded gears with 6mm bore from Quality Transmission. They had exactly 8 in stock, which is what I need for four wheels, but I'll have no spares at that point...

Offline jwatteTopic starter

  • Supreme Robot
  • *****
  • Posts: 1,343
  • Helpful? 81
Re: Good source of 6mm bore miter gears?
« Reply #7 on: May 21, 2014, 04:28:02 PM »
OK, Venture Manufacturing was a waste of time. They have one line of 90 degree gear boxes that have 20:1 gearing or worse, and that are a lot more expensive than what I was looking for. It also comes only in half-inch shaft when I was looking for 6mm. So, minus points for not actually reading the requirements, and posting a spammy link for SEO purposes, and wasting my time.
« Last Edit: May 21, 2014, 04:29:50 PM by jwatte »

 


Get Your Ad Here

data_list