SCHMETZ SERV 7

Increased needle stability and reliable seams

Besides fabric damage, skip stitches are a problem that frequently arises when sewing elastic material. To prevent them, SCHMETZ developed the SERV 7 needle. This specially shaped needle is made for almost all needle systems, with all the main point shapes and in all current needle sizes.

The main distinguishing features of the SERV 7 design are the hump scarf that makes a particularly large loop of thread which can be more easily caught by the point of the hook and the blade reinforcement, that ensures the extraordinarily high stability of the needle. To produce the smallest possible stitch holes and optimise fabric displacement, the SERV 7 design thus often allows the use of a needle one size smaller without any reduction in the stability of the needle.

SERV 7 needles have a 15 % reinforcement, and as much as 20 % in some needle sizes. Therefore, the needle is especially stable and far less likely to “bend”. Neither the hook or looper nor other machine parts, e.g. the throat plate, are damaged.

Advantages:

• Effective prevention of skipped stitches
• Extremely high needle stability prevents the needle from deflection
• Less needle breakage
• Compared to a standard needle a smaller needle size possible without loss of stability
• Precise stitches and therefore neat seam appearance
• High productivity
• Reduced wear on machine parts (hook, needle plate, etc.) and therefore reduced costs

Application:

• Highly elastic materials
• Sewing a varying number of material layers in one operation
• Thick and strong material layers
• Material combinations
• Cross seams
• Use of elastic sewing threads
• Multidirectional seams