Pfaff sewing machine needles

[Lady Toadflinger]

I am hoping someone can help me here.  I came across a bunch of Pfaff sewing machine needles at a thrift store, and of course I snapped them up! Unfortunately the numbers on them are unfamiliar to me. Can anyone tell me what the numbers mean? (fine, medium,heavy..etc...) I have 80, 110, and 120. I'd rather not just experiment with them!
Gramercy!  Lady T

[Kate XXXXXX]

80 is standard.  90 and 100 are heavy duty for a domestic machine.  You probably don't want to be sewing anything tough enough to need a 110, and definitely not a 120!  Check that they are the correct type for your machine, especially the heavier ones.

[Betty Munro]

Sounds like you might need to get a Pfaff commercial machine to go with your new needles.

[Lady Toadflinger]

Thanks for the info!  I guess I wont try to use the heavier needles. I don't want to muck up my machine, or any projects.  I have enough regular needles to last a good while.

[Lady Kathleen of Olmsted]

When I worked at the Costume shop years ago, I sewed on Pfaff machines. We used the standard 90/14 needles. The higher the number, the tougher the fabric. 80's were used on silks and polyester stretch fabrics.