trikvart

Thank you all for good answers and information. I haven't bought the machine yet. Under testing the tension of the lower thread is set to tight. When I get it to sew correctly I will decide. It' difficult to find much information about the machine. I have made a scan of the instruction book. It's in German, English, French and Spanish. Is it somewhere in this forum I can upload and share it?

The max needle size is 100 says the instruction book. I'm not sure what thickness and thread size I will use. I know the machines have been used for leather work by their owner. I will ask him if he has got some accessories like binder and feet for it. The roller guide is easy to remove and can easily be modified to a strait guide like @RockyAussie's guide.

I will do. I understand that bells and whistles are not to prefer on a hobby sewing machine. I think to remove the air driven lift and reverse are small job. I'm a mechanical engineer and know mutch about mechanics but not mutch of sewing I have read some post by "RockyAussie" about the cons of this machine for small leather works. If I got a good price for both machine, one can be a reserve if the other one breaks. What kind of accessories except thread, needle, feats do I need? Thanks for replay on this thread!

The machine got reverse controlled by air. The stitch lengt is controlled by the adjuster on the photo. Stitch between 0 and 6 mm both way. The feed dog is oscillating with the walking needle. No need for large cutout. I will make a flat table for sewing large sheets.

Hi and thanks for letting me in! I know it's hard to find a machine solve everything. For some years I have been looking for a industrial sewing machine. Now I got an option bying a Pfaff 331 (or two). It look OK, is a needle feed, free arm machine. Got clutch motor from Efka with variostop and needle positioner. Pnaumatic foot lift and reverse. Hydraulic elevating table. The machine is old, but have been stored for 20 years. I have tested it and all function looks OK. NMy need for a machine is to - fix large cotton tents - sew and repair car and some boat canvas - car upholstery, seats and carpets - leather works like small bags and tool covers Is Pfaff 331 a good machine for this? The price is about 450 usd and I think it's a good offer.