Thursday, March 5, 2015

J.D. Dougall Repair

This mid-1870s Dougall Lock-Fast suffered a broken hammer spur at some point.   If that weren't bad enough, a previous owner decided to purposely cut the spur from the other hammer, so that they'd match!  It also suffered a failed mainspring in the left lock.  The locks are by Stanton and are best quality, as is the rest of the gun, so the repair work must also be best quality.
First we'll cover the hammer repairs.

The hammers as "modified"

The hammers fixtured with new material for welding.  They were previously annealed in an oxygen-free environment to prevent scaling (they were case-hardened and will be again when finished).

The hammers after welding, the hammer on the right has been roughly shaped

The left hammer, shaped, checkered and polished

Both hammers finished, hardened and the finish artificially aged to match the rest of the gun

Now I'll detail making the left mainspring.

The broken spring and the raw stock (1095) that the new one will be made from

First the material is heated and forged over then the excess width is machined off, leaving enough material to file up the pivot stud

After the pivot stud is filed up then the rebound leg is roughly filed

Then the spring is heated and formed into its approximate final bend and the swivel end and both legs are filed to shape

The finished spring, heat-treated, polished and ready to install

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