Drill Block for BSA PWD

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If you plug in some wheels and axle's, how is the rear wheel migration towards the heads rolling forwards and reverse? Is it even? If you made another would you lower the drill holes so you would not have to add a credit card?
 
you will wear that jig out real quick like that..some advice i could give you is get carbide inserts..those steel ones will wear out quick and you will have problems
 
trust me steel will wear out quicker than you think.. even when drilling buy hand with pin vise with steel bit..if you are selling these i would use carbide bushings
 
OCDerbyDad said:
It was the only way to give support to a canopy weight and keep the body down to 7 grams.

If this were mine, I would do away with the canopy weight option, and put cubes in the rear after squaring off the openings. Although I have to admit that the canopy weight is nicer looking, just not as fast.

With so much weight in the rear, you could also consider removing to 2 cross spares (depending upon how thick the body's side pieces are). If they are super thin, just add a small piece on each outside. I would also use fenders, and if side pieces are necessary, just chop a pit of the end of the rear fenders so that the body's side is nice and smooth aerodynamically including the fender.
 
Hardened steel bushings were what he used to my understanding. Use a pin vice with HSS bits and it should prolong the life of the bushings.

OCDerbyDad said:
TRE said:
you will wear that jig out real quick like that..some advice i could give you is get carbide inserts..those steel ones will wear out quick and you will have problems
Steel will wear if you use carbide bits. Steel with steel will not wear as fast as you think. You'll have to do over 100 cars to wear them out. Have you seen prices on Carbide bits of that size? I don’t know how Goat Boy gets them so cheap. I'm honestly thinking he uses hardened steel, as that’s what these are.
 
This a section of a post by goat boy on the bushings

I have never had a problem using a carbide drill with these bushings because the bushing and a carbide drill are about exactly the same hardness. Both are about C60-C70 hardness.

Read more: http://zeebzob.proboards.com/thread/66/goat-boy-degree-drill-fixture#ixzz3WqaPqY8j
 
OCDerbyDad said:
... because people will pay anything to get that extra .001 of a second...lol

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