• PI Tech Services

Wire Die Springs

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PI-TECH Services offers Wire Die-Springs, which is designed and manufactured by Bordignon of Italy. These springs are available in external diameters suitable for housing hole sizes ranging from 16 mm to 38 mm and in free-lengths ranging from 20 mm to 200 mm as per the size selection table.

Black springs have been produced mainly to substitute Gas Springs; Polyurethane Springs; and Disc-Springs (Belleville washers); in force categories of 350; 500; 1,000; 1,500; and 2,000 daN. These springs can also be used as 2-in-1 (a small black spring inside a larger black spring) for increase in the load-carrying capacity. In this way,

• The maximum load-capacity of springs meant for 32 mm housing dia. and free-length of 100 mm can be raised by upto 20% (from 1,500 daN to 1,850 daN)
• The maximum load-capacity springs meant for 38 mm housing dia. and free-length of 100 mm too can be raised by upto 20% (from 2,000 daN to 2,500 daN)

Wire springs can tolerate much higher temperatures of upto 125C as compared to gas springs which can resist only upto 70C; or, the presence of lubricants as compared to polyeurethane springs; and last much longer than disc (Belleville) springs. Wire springs require no maintenance. These springs are going to be introduced at the EuroBlech Fair 2010 in Germany. These will be supplied in India in rupee-payment.

The 'supreme' load spring; termed as 'BLACK'. It has been produced from such a big rectangular section of flat wire through the process of ‘Cold-Coiling’ as never done before anywhere else in the world. The maximum compression of the free length is of about 11%.