Axle prep...

Secrets, tips, tools, design considerations, materials, the "science" behind it all, and other topics related to building the cars and semi-trucks.
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Gtdhw
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Axle prep...

Post by Gtdhw » Sat Jan 30, 2016 1:48 am

BSA box axle. I'm sure that there are many different ways to prep axles, but this is what we're doing this year. Thought the pics might be helpful to some (although not the best, macro-scope, through my phone camera, lol)

I still have two more steps to do, once the MaxV Diamond polish shows up, then barnish with graphite.



Out of the box -

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Filed (w/angled head) -

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Put in axle block and trued, then 400 grit w/s -

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800 grit w/s -

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1000 grit w/s -

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1500 grit w/s -

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2000 grit w/s -

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2500 grit w/s -

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3M Rubbing Compound (36060) -

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Mothers polish -

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iflytii
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Re: Axle prep...

Post by iflytii » Sat Jan 30, 2016 8:13 am

What a great resource! Thanks for posting this!

Our rules state you can remove material defects and sand/polish but we can not materially change the shape of either the wheels or axles. So we filed ours square, but I sure like that angled head...

Are you using water in your sanding steps, or a chemical like wd-40 or brasso?



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Scrollsawer
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Re: Axle prep...

Post by Scrollsawer » Sat Jan 30, 2016 8:28 am

Great pics. Thanks!

Our prep is: File, 400 grit, 600, 800, 1000, 1250, 1,500, 2,500, 4,000, 6,000, 8,000, Brasso. Graphite burnish.

Will be adding Lemon Pledge to that for the Mid-America.

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Gtdhw
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Re: Axle prep...

Post by Gtdhw » Sat Jan 30, 2016 8:40 am

iflytii wrote:
Are you using water in your sanding steps, or a chemical like wd-40 or brasso?

Thanks, & water only.


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Loder66
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Re: Axle prep...

Post by Loder66 » Sat Jan 30, 2016 11:36 am

Now I want to go buy a Macro Scope! Great photos. What macro scope are you using?


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Gtdhw
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Re: Axle prep...

Post by Gtdhw » Sat Jan 30, 2016 12:19 pm

Loder66 wrote:Now I want to go buy a Macro Scope! Great photos. What macro scope are you using?


Newage HiLight 20x Brinell Scope, model # 5620-05


http://www.hardnesstesters.com/Products ... Scope.aspx


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Perry24
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Re: Axle prep...

Post by Perry24 » Sat Jan 30, 2016 9:22 pm

That axle looks great! Is the coning all done by hand with a file?

Also, where are you buying the fine grit paper from? Locally, 800 is the finest I can find.



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Gtdhw
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Re: Axle prep...

Post by Gtdhw » Sat Jan 30, 2016 9:28 pm

Perry24 wrote:That axle looks great! Is the coning all done by hand with a file?

Also, where are you buying the fine grit paper from? Locally, 800 is the finest I can find.

Thanks! The head was angled/coned with file only, and most auto parts store should carry to at least 1500 grit. I get mine from the local auto body store though.


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Speedster
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Re: Axle prep...

Post by Speedster » Sat Jan 30, 2016 11:09 pm

Walmart carries a variety pack of paper up to 2500 and Auto Zone carries a single sheet of 3000.



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Re: Axle prep...

Post by iflytii » Sat Jan 30, 2016 11:40 pm

I've found up to 2500 pretty easy local at auto parts stores, 3000 in a few places.

I ended up ordering some finer paper from Amazon

Variety pack of traditional wet/dry paper - 3000, 5000, 7000: http://www.amazon.com/gp/product/B00SD1 ... ge_o03_s00

I also picked up a variety pack of "Zona" paper ranging from 1 to 30 micron which gives you a good overall spectrum.
http://www.amazon.com/gp/product/B001BH ... ge_o03_s01



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Re: Axle prep...

Post by Perry24 » Sun Jan 31, 2016 4:14 am

Thank you. I never thought to check Wal-Mart. It looks like my local one has paper up to 2500.



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Gtdhw
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Re: Axle prep...

Post by Gtdhw » Sun Jan 31, 2016 10:36 am

Found this on one of the Derby speed supplies sites earlier this week....

30 micron - 400 grit
15 micron - 600 grit
8 micron - 1350 grit
5 micron - 1500 grit
3 micron - 2500 grit


Was told that Mothers is a 2 micron polish, and that Brasso is 1 micron.


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iflytii
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Re: Axle prep...

Post by iflytii » Sun Jan 31, 2016 2:33 pm

Gtdhw, I think those might be a little off. These numbers are what I found when researching:

American
Standard
(Grit) - Mesh - Micron
100,000 - 0-0.5 - 1/4
60,000 - 0-1 - 1/2
14,000 - 0-2 - 1
13,000 - 1-2 - 1.5
9,000 - 2-3 - 2.5
8,000 - 2-4 - 3
5,000 - 2-6 - 4
4,500 - 4-6 - 5
2,800 - 5-10 - 7
1,800 - 6-12 - 9
1,400 - 8-20 - 14
1,200 - 10-20 - 15
1,050 - 12-25 - 18
800 - 20-30 - 25
600 - 20-40 - 30
500 - 30-40 - 35
325 - 40-50 - 45
285 - 50-60 - 55
240 - 60-80 - 70
225 - 80-100 - 90
160 - 100-120 - 110
100 - 120-160 - 150

Here is a handy .pdf
http://www.idrockman.com/documents/grit ... nchart.pdf

...and here is a .pdf that keys the zona colors
http://ep.yimg.com/ty/cdn/yhst-16765698 ... Papers.pdf



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Vitamin K
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Re: Axle prep...

Post by Vitamin K » Sun Jan 31, 2016 4:01 pm

I feel pretty lazy compared to you guys. My polishing steps are 500->1000->2000->3000->Brasso.

I only use the 500 if I'm running BSA axles. If rules say I use a smoother axles (like Max-V or Awana), I start at 1000.



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Gtdhw
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Re: Axle prep...

Post by Gtdhw » Sun Jan 31, 2016 4:56 pm

iflytii wrote:Gtdhw, I think those might be a little off. These numbers are what I found when researching:

Good stuff!


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