heres the problem, i would like to get actual schematic drawings of top break revolvers. the best i can find is from numrich, but those dont help me at all, cant create a 3d model from a 2 dimensional drawing that doesnt have measurements of all sides.

Is there any source?

You seem to be seeking 'working drawings' which I doubt you will find. There are books showing exploded-view drawings and dis-re-assembly info but none I have seen with dimensions. Probably the only dimensioned drawings that ever existed were with the original manufacturer, if any. Even then, they may not have worked from drawings.

If you have to make a part why not do it the old fashioned way like the rest of us do? We estimate, guestimate, cut and try.

Other than possible existence in the S&W engineering archives, it's not likely there are any complete dimensioned drawing sets. There are computer programs and instrumentation available to create 3-D graphics from the components themselves, but that's very expensive.

I have a S&W 4th model tip up. been trying to find directions how to re-place the cylinder stop. any out there ???
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