LeeMan

Hello Northmount, there are plenty of manuals but the only information i found about the threat and needle is seen below. No information about max thickness of thread and needle unfortunately Thanks for your help

Hello Everyone, Your forum is really interesting, i just recently bought a Singer 45k89 and since i am new to sewing machines i was wondering if I could get help concerning the thread thickness that can be used with this machine? I work on 3mm - 5mm leather and i do heavy duty bags for old military vehicles. Which needles and which thread thickness should be used for such work? Best Regards Lee