Chief Delphi - sprockets

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Adama

11-01-2007 22:14

sprockets

If i use the andymark kit wheels and try to make a six wheel drive, is there a way to mount two sprockets on the center tire? Can i simply buy the appropriate long bolts from home depot and some small washers or do i need to use hardware titled for the wheels?

Stuart

11-01-2007 22:18

Re: sprockets

I dont see why you cant just use long bolts, thats what we would do.

Justin M.

11-01-2007 22:19

Re: sprockets

We are doing the same thing with a 4WD chassis. Just get a longer bolt and run it through the wheel, and through both sprockets. Then bolt it down.

Adama

11-01-2007 22:28

Re: sprockets

cool

thanks

Adama

11-01-2007 22:42

Re: sprockets

what kind of bolts might those be? i know it says somewhere but i am going dumb now that its 11pm

Justin M.

12-01-2007 11:17

Re: sprockets

Quote:

Originally Posted by Adama (Post 554639)

what kind of bolts might those be? i know it says somewhere but i am going dumb now that its 11pm

I believe they are .165" holes. Standard 10-32 bolts/nuts from lowes will fit.

Stuart

12-01-2007 22:25

Re: sprockets

8-32 not 10-32. took us an hour at home depot to find 2" 8-32(its a bad home depot)

Justin M.

13-01-2007 16:05

Re: sprockets

Quote:

Originally Posted by Stuart (Post 555397)

8-32 not 10-32. took us an hour at home depot to find 2" 8-32(its a bad home depot)

Are you sure? On the AndyMark site it says the holes are drilled for 10-32.

Quote:

Originally Posted by http://www.andymark.biz

Mounting Holes
6 holes (0.165") for #10-32 screw on a 1.875" dia bolt circle. Threads will need to be tapped into these holes.

Lil' Lavery

13-01-2007 16:11

Re: sprockets

Quote:

Originally Posted by Justin M. (Post 555868)

Are you sure? On the AndyMark site it says the holes are drilled for 10-32.

10-32 if you were going to tap them, 8-32 if you want to use them as through-holes.

Adama

13-01-2007 22:49

Re: sprockets

thanks again everyone

Bochek

14-01-2007 12:01

Re: sprockets

Quote:

Originally Posted by Lil' Lavery (Post 555873)

10-32 if you were going to tap them, 8-32 if you want to use them as through-holes.

whats even stronger is to drill out the holes and use 10-32 or M4x0.75 through bolts

- Bochek

IndySam

14-01-2007 13:39

Re: sprockets

last year we used long bolts and simple home made spacers and it worked great. Just be sure to use loctite or they will work loose.

Carmine Rizzo

14-01-2007 14:05

Re: sprockets

This is possible and we have done this in the past. If you are going to do this you have to consider several items.

Any slop in the Bolts and holes will give you a potential failure point from the sheer forces. This will be exacerbated by the slop in the housing.

Things to consider

Oversize the holes on the wheels to .1875-.189.

Add Spacers (Aluminum will work) to the sprockets try not to use a hub on the sprocket for weight.

C’Bore the sprockets for the spacers

Use Socket Head Cap (Ask a local machine shop or Hardware store, not Home Depot, Allen or Holo Krome) screws, as they are harder and will provide the strength.

Use ny-loc nuts for later removal

Do a PM (Preventive Maintenance) between matches and have spare screws

Good Luck from Team #75

Team #75 Mentor

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