Mauser K98 blueprints

[Fal Grunt]

Another situation where my lack of GD&T knowledge has bitten me, the method used in the documents is listed in your link.

A question for you. I have access to a lathe(with a four jaw chuck and the usual kit), verticle mill, and a hydraulic press. I recognized at the start of this project that the internal camming surfaces would need something weird to actually impliment, and with more knowledge I have come to the conclusion that I would need either a machine capable of live tooling or a shaper(though I am not sure how this would work, only that people recommended this method on a machinist's forum). My plan for this is to do some engineering to make a mini-shaper that grinds out the cam incrementally; however, on revisiting the documents I've realized that I overlooked the raceways in the receiver.

How would I do these without eliminating the bolt overtravel stops at the end of the receiver? The guide which started this project (linked here) uses ground down standard sized broaches to get them to near finished, then a file to get the final profile, however this method eliminates the overtravel stops as previously stated. The only tool that I can see being able to do this is a shaper, that is unless I include the idea into the 'mini-shaper' concept said previously.

I don't know. What is your take on it? Am I missing something that is obvious?

Either way, I need to revisit my kinematics

Apologies I missed this previously.

Will send you a PM.

 

[dder11]

Sorry, I forgot to add this update to the thread.

I have "finished" the receiver CAD and am now getting onto the bolt. I am about 80% sure it is accurate, but I have yet to go through validate it. The only parts I have left off the model are the edge breaking operations on the front of the 'rear bridge' besides the stripper clip guide, and the edge breaking operations on the side wall. Those features are monumentally awful to model and I don't particularly want to spare the brain power doing so.

On a separate note, do ya'll know about the thick side wall receivers? Specifically, how does the continuation of the front ring radius end/taper into the smaller radius that makes up the rest of the forging? I cannot find an image of an original thick wall receiver out of the stock.