Kenmore Model 158 Sewing Machine: Bobbin Case Restoration

I picked up a spare sewing machine as a crash test dummy for modifications to Mary’s Kenmore Model 158. It’s in reasonably good condition, although the bobbin case showed a bit of rust:

Kenmore bobbin case - rusted overview
Kenmore bobbin case – rusted overview

Taking the tension spring off revealed more rust:

Kenmore bobbin case - rusted parts
Kenmore bobbin case – rusted parts

An overnight soak in Evapo-Rust got rid of the corrosion and left the pits behind:

Kenmore bobbin case - restored parts
Kenmore bobbin case – restored parts

Those imperfections on the tension spring are pits, not bumps, despite their appearance.

It doesn’t seem so bad from the outside:

Kenmore bobbin case - restored
Kenmore bobbin case – restored

It probably won’t work nearly as well as it should, this being one place where a smooth surface counts for a lot. Fortunately, it’s just a crash test dummy machine and good results aren’t critical.