The perfect surface of compound needles for warp knitting machines leads to smooth yarn gliding during the loop-formation process. This is important for a uniform loop structure and leads to low hook strain and less wear. Depending on the machine model, Groz-Beckert offers various hook, shank and butt geometries.

Depending on machine type and attachment to or on the needle bar, different hooks and butt shapes are possible.

Patent needles are nowadays used only in galloon crocheting machines, especially for the manufacture of binding. This includes elastic strips, such as required in medical textiles, but also decorative and lace ribbons.

During the warp knitting process the head of a spring beard needle must withstand extreme stress. Countless times it opens and closes, and is especially subject to strain as it is closed by the needle presser. A special steel grade is thus very important for manufacturing spring beard needles in order to ensure the spring effect and an acceptable service life of the needle.

There are numerous wire and stamped closers which vary greatly in their geometry, manufacturing process and machining operations. Corrosion-resistant closers in tricot machines are now standard on the market.

The perfect rounding and symmetry of the guide needles guarantees best quality in the module manufacture and during knitting.

Crucial to the quality of the corresponding modules is ultimately the accuracy and reproducibility of the manufacturing process for the individual sinkers.

Depending on the number of guide bars, the yarn employed, the yarn tension and the amount of thread passing through the holes of the guide needles, wear can increase the consumption of guide needles. These days modern guide needle modules are usually injection molded using high-performance plastics. Therefore, they possess a very good dimensional stability at very light weight.

While high-speed tricot machines almost only use combined holding down / knockover sinker modules, Raschel machines employ very different types of modules. While module precision is crucial to fabric quality in holding down / knockover sinker modules, other modules often have only a supporting or holding function in loop formation and are thus less important to quality.

Closer modules are the most delicate of all available warp knitting modules and are crucial to loop formation. The position of the closer in the casting and the exterior contour of the module itself are of great significance. Every irregularity leads to irregular loop structure, more straightening work and even more wear on the closer and in the needle slot.