Fourslide

Where it comes up

• Springs, wire forms, and fourslideCompression, extension, and torsion springs, wire forms, and fourslide clips made from round wire and flat strip.
• Metal stampingShort- to medium-run stampings: brackets, clips, shields, and plates cut and formed from sheet or coil in a press.

Related terms

Progressive die

A progressive die is a stamping die with a series of stations that pierce, form, and cut a part in sequence as a metal strip feeds through the press. One finished part drops with each stroke. It is the lowest piece-price option for high-volume small and medium stampings.

Spring rate

Spring rate is the load needed to deflect a spring one unit of distance, expressed in lb/in or N/mm. It depends on wire diameter, coil diameter, active coils, and material. On commercial-grade compression springs, load at a set height is typically held to about ±10%.