Wednesday 8 May 2013
Using Paraffin to Unstick Stubborn Parts
Last week I collected a beautiful German sewing machine from a friend so I could clean it up for her. It had a few problems I needed to sort out, the most obvious of which was the foot. I undid the thumbscrew so I could take off the foot and found that the foot was stuck on fast. Someone had obviously been trying to get it off in the past and loosened the presser bar in the process, because it was loose and the foot could turn as if it were the hand on a clock. Tightening the presser bar back into position was easy enough, but I still needed to get the foot off.
The answer was paraffin. I tied a bit of cloth around the foot, spooned paraffin onto it until it was thoroughly soaked, and left it overnight. The next morning the foot just dropped off. The paraffin had broken up all the old oil residue that had dried between the presser bar and the foot.
The same trick worked at the opposite end of the machine and ungummed the stitch length mechanism too.
The machine is now cleaned up and raring to go...