Making a Schlagfederstangen-Mutter for the SIG P210: Quick Lathe Project

Published on February 19, 2024
Duration: 6:16

This video details the process of machining a replacement hammer strut nut (Schlagfederstangen-Mutter) for the Swiss SIG P210 pistol using a lathe. The custom part is designed to prevent wear on the firearm's frame by distributing force over a larger area. The guide covers drilling the cross-hole, turning the diameter, tapping the internal thread, and parting off the finished component.

Quick Summary

The SIG P210's factory hammer strut nut can cause frame wear. A custom-machined nut, known as a Schlagfederstangen-Mutter, prevents this by spreading the load over a larger area. This DIY project involves using a lathe to turn a brass rod to 0.210 inches and tapping it with an M3 x 0.5mm thread.

Chapters

  1. 00:00Introduction: P210 Hammer Strut Wear
  2. 00:15The Schlagfederstangen-Mutter Explained
  3. 00:42Cost of a Commercial Part
  4. 01:09Required Tools and Materials
  5. 01:17Preparing the Brass Rod
  6. 02:09Order of Operations: Drill First
  7. 02:24Marking and Drilling the Cross-Hole
  8. 03:03Turning Down the Diameter
  9. 03:50Tapping the Internal Thread
  10. 04:22Filing the Recess (Optional)
  11. 04:35Parting Off the Nut
  12. 04:49Chamfering Edges
  13. 05:11Finishing and Re-Chucking
  14. 05:29Finished Schlagfederstangen-Mutter
  15. 05:33Time Estimate and Conclusion

Frequently Asked Questions

Why is a custom hammer strut nut needed for the SIG P210?

The factory hammer strut nut on a SIG P210 can cause wear on the firearm's frame over time. A custom-made nut, like the Schlagfederstangen-Mutter, distributes this wear over a larger surface area, preventing damage to the frame and extending the pistol's lifespan.

What are the key dimensions and tools for making a SIG P210 hammer strut nut?

You'll need an M3 x 0.5mm tap and a #39 drill bit. The brass rod should be turned down to approximately 0.210 inches in diameter. A lathe is essential for this project, along with standard machining tools like a parting tool and calipers.

What is the purpose of the recess on the custom hammer strut nut?

The recess on the custom-machined hammer strut nut is primarily aesthetic, giving it a more finished look. It also allows the upper nut plunger piece to seat more flushly into the nut, though this feature is not strictly necessary for function.

How can I prevent chatter when machining a small part like this on a lathe?

Chatter during machining can be minimized by using a sharp cutting tool, reducing tool stick-out (ideally no more than three times the diameter), taking lighter cuts, and ensuring the workpiece is securely held. Using a thinner parting tool for cutting off the part can also help.

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