Rick Pen Report post Posted July 6, 2010 First of would like to say hi to all. I fairly new to leatherwork and all I have sown is done by hand. I have a next-door lady that picked up an old singer 99k from an estate sell this weekend and was wondering if it would handle up to 14 oz duties? Thanks Rick Quote Share this post Link to post Share on other sites
Wizcrafts Report post Posted July 6, 2010 First of would like to say hi to all. I fairly new to leatherwork and all I have sown is done by hand. I have a next-door lady that picked up an old singer 99k from an estate sell this weekend and was wondering if it would handle up to 14 oz duties? Thanks Rick No. You can fit 1/4" under the pressor foot, but it is doubtful you will be able to stitch that much leather, unless it is soft leather. Also, you are limited to using #69 nylon thread and a #18 needle. This is fine for leather garments, or latigo, but not belts, holsters, or harness. Most leather goods 1/4" thick are sewn with #138 bonded nylon thread, top and bottom. A 99K is not equipped to handle #138 thread, or the #22 needle it requires. Furthermore, the 99K is a flat foot, drop feed machine. If you try to sew 1/4" of medium temper leather you will have to increase the pressure spring on the pressor foot, possibly all the way down. This increases the drag on the top grain and will cause the stitch length to vary all over the place and the layers will move out of alignment, from top drag. If you don't increase the foot pressure, the needle may lift the leather as it begins its ascent. This causes the top thread to not form a loop under the cover plate. Without a loop, no top thread is picked up and pulled around the bobbin, leading to skipped stitches. If you must use such a machine, at least fit it with a roller pressor foot. Quote Share this post Link to post Share on other sites
