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Looking for a versatile jig


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#1 btk

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Posted 23 March 2018 - 08:00 PM

I'm trying to wade through the various chassis jigs that are out there.
 
I'm primarily racing/building cars based on the R-Geo Crusher (dirt late model) and Thrasher (asymmetrical asphalt modified) chassis right now.  These both use 1/8" axles.
 
My biggest challenge is getting the chassis aligned properly on my basic jig that only has pins for the rear axle.  I'd like to be able to pin the chassis straight so that not only are the axles level, but also parallel to each other.  I just don't have enough hands to do it with calipers.
 
I've been looking at the Backtrack Retro Pro, various Precision Scratch Builder jigs fixtures, and the out-of-stock-everywhere Rick's Jig from R-Geo.  I'm trying not to break the bank on this, but would also like to pick something that can be used for additional retro/flexi projects down the road.
 
It looks like the Precision Scratch-Builders and the Backtrack Retro Pro are only for 3/32" axles, whereas the R-Geo is designed for 1/8" axles with the option of adding sleeves around the axle pins to adapt it for 3/32" applications.
 
Am I on the right track at least?  I'm trying to do my homework as best I can since none of these are exactly cheap. =)

Brian Keifer




#2 Dominator

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Posted 23 March 2018 - 08:07 PM

The Back Track jig and precision scratchbuilding jigs are the two most commonly used. I personally have over 200 builds on my back track jig.

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#3 btk

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Posted 23 March 2018 - 08:17 PM

Can they both be used for a 4" wheel base with 1/8" axles?


Brian Keifer

#4 MSwiss

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Posted 23 March 2018 - 08:21 PM

Backtrack sells pins for 1/8" axle, but being a turned item, they are pricey.

 

What would be much cheaper is for you to make your jig axles from 3/32" piano wire with pieces of 1/8" brass tubing soldered in the middle.

 

You just have to see what the 1/8" tubing measures out at.

 

It could be .1235" or it could be .1250".

 

If it's .1250", you will probably have to sand it down a tad to fit in your 1/8" bushings.

 

PS-yes, they both can be used for 4" wheelbase.

 

That's a typical Retro wheelbase.


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#5 slotcarone

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Posted 23 March 2018 - 08:21 PM

You can use the 3/32 axle jig by adding a piece of tubing on the jig axle to bring it up to the 1/8 size.


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#6 SlowBeas

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Posted 26 March 2018 - 10:03 AM

Something that's worth every penny is a good set of jig wheels to ensure the axle is set at the proper height. Jig wheels take into consideration the height difference the tire will make on the track. I have a set from R-Geo and another from Precision. Both are good.

 

Good luck with your scratchbuilding.

jb


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