Chief Delphi - pic: Lightweight (relatively) 2 CIM Shifting Swerve Drive

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Chief Delphi (http://www.chiefdelphi.com/forums/index.php)

- Extra Discussion (http://www.chiefdelphi.com/forums/forumdisplay.php?f=68)

- - pic: Lightweight (relatively) 2 CIM Shifting Swerve Drive (http://www.chiefdelphi.com/forums/showthread.php?t=131128)

Bryce2471

16-11-2014 13:43

Re: pic: Lightweight (relatively) 2 CIM Shifting Swerve Drive

Quote:

Originally Posted by asid61 (Post 1408781)

Oh. For the lower belt, I just used a steel sleeve around a slightly longer aluminum sleeve. The aluminum sleeve had a 10-32 screw go through and clamp to the top plate. Then the steel sleeve was still free spinning, but constrained in place.
You could just use a 1/4" or 5/16" aluminum sleeve and use a 1/4" or 5/16" bearing from McMaster or Boca Bearings. I know 192 used Boca last year for their gearbox gears, but personally I haven't used them.

Thanks for the good info! I'll do some looking around for a needle bearing that will do the job. If I don't find one that fits the bill, I'll probably resort to a brass or IGUS bushing.

asid61

18-11-2014 01:08

Re: pic: Lightweight (relatively) 2 CIM Shifting Swerve Drive

Quote:

Originally Posted by Bryce2471 (Post 1408817)

Thanks for the good info! I'll do some looking around for a needle bearing that will do the job. If I don't find one that fits the bill, I'll probably resort to a brass or IGUS bushing.

Bronze over brass. Brass does not have the same bearing qualities as bronze.

Bryce2471

18-11-2014 02:07

Re: pic: Lightweight (relatively) 2 CIM Shifting Swerve Drive

Quote:

Originally Posted by asid61 (Post 1409009)

Bronze over brass. Brass does not have the same bearing qualities as bronze.

I'm going to use a 0.3125" ID 0.5" OD 0.5625" width needle bearings from SDP-SI. They're only like $5, so why not.

Tyler2517

18-11-2014 02:20

Re: pic: Lightweight (relatively) 2 CIM Shifting Swerve Drive

Make sure the shaft has a surface hardness that can use it with out destroying the bearings/the shaft.

Gregor

19-11-2014 18:31

Re: pic: Lightweight (relatively) 2 CIM Shifting Swerve Drive

Love the out of the box design.

What are the ratios, it looks like it has a tiny spread?

Bryce2471

19-11-2014 19:01

Re: pic: Lightweight (relatively) 2 CIM Shifting Swerve Drive

It's free-ish speeds are posted in this thread:
http://www.chiefdelphi.com/media/photos/40954?
it's ratios are 2.85to one in high, and 5.13 to one in low. It's running a 2.75" wheel. The speak is small enough to use autoshifting code, but I wouldn't call it tiny.

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