Screwproduction - Stainless A2/A4 specials and standards

The productionplant for fasteners is the latest step in the company history. This plant together with the workshop make specialparts from small to large series. Materials is mainly stailess A2 and A4 mateirials in quality up to class 80 for hex bolts. This plant gives a fantastic posibility for effective and costeffective production of bigger series of special items, but also standard hex bilts and socket screws. You can read more about the productrange in the folder! Only in Swedish.

Headmark for hex bolts is "S-B A4-80" (same S-B mark for other materials).

Picture above: A hexbolt takes shape. From right to left the first punch in a serie of five. Last step is threading and washing that is made in separate machines.The screws in the picture is not washed, this make them clean from oil and very bright.

Production include both standard and specials, where the biggest part is specials. Because of a large range of tools and raw material we can supply many items woth short deliveryime.

New for 2007 is a 5-station machine that give good posibilities to make more complicated items than before. This machine also produce hex head, socket head, counterank socket head and much more. More complicated geometries is posible than in a 4-station machine and thats the reaon we invested in the machine. With good control we produce more and better specials than before, with high quality!

A screw take shape...

The raw material is delivered on coils of about 1000 kilos and up. This is complimized to the specific diameter that the screw need for threading. Tha material is heatened up to make it easier to shape to the correct geometry.

The material passes the mashine in five steps and then get the final shape (not theraded yet). During the production all goods is followed by material certificates and productioncards to have the full control ower the mateirla and production. This give the posibility to find the source if a problem appears.

After the screw have passed the first machine the items is cleaned from oil. Next step is the threadrolling. The diameter of the screw is now exactly as it have to be to get a full thread. To much or to less material will end in a bad therad, and the hole serie have to be canceled in production. All threading is made in separate machines showed below. After therading there is three steps left before the goods is ready for shipment: washing, qualitycheck and packaging.

Producing fasteners is a high-tech-art that need good skilled workers and good machines. Screwproduction is a highly developed and effective production.