Sewing Machine Hook Timing | Rotary Hook Sewing Machine Timing

The instructions below are intended for setting the time on sewing machine models, it's a whole series of vintage Pfaff sewing machines, I have to list them all: Pfaff 1222, Pfaff 1221, Pfaff 1214, Pfaff 1213, Pfaff 1212, Pfaff 1211, Pfaff 1199, Pfaff 1197, Pfaff 1196... 
Likewise, this instruction can be applied to most sewing machines that have a rotating hook, everything is very similar, the specified special tools are not mandatory and especially necessary, the specified measures are also not "sacred letter" and you can slightly deviate from them.

Bernina Light Bulb | Bernina Sewing Machine Replacement Bulbs

The post is of an educational nature, if you are not sure of your knowledge leave the work to an expert, before any works pay attention to:! 
➧ Before any repair and service work, Disconnect the sewing machine / foot pedal etc.from the power supply, Remove the cable and mains plug from the socket. 
➧ Read before you start working on the machine the operating and service manuals, that's what they're there for,
➧ Take your time for everything you do, just don't work fast , if you have no idea, you should consult a specialist,
➧ Hustle and bustle creates thoughtless action, accidents and bungling.! 
➧ It is essential that you only use suitable tools, only use good tools 
➧ Do not leave the sewing machine running when it is open, only move the open machine by hand, Do not use the foot pedal when it is open.!

Industrial and Household Sewing Machine Needles Singer

Singer Needles Sizes 
Singer Needles are manufactured in Brazil with high technology to produce specific needles for actual current applications. The correct needles regarding size and point style result in better stitch formation.