How The Screws Are Produced

Design

Our technical office analyses our clients’ drawings and, where necessary, suggests any structural changes or improvements to optimise the production process and functionality of the product. That is to say, a co-design approach is adopted.

Making the equipment

Tools for the cold forming process are designed and produced internally and in synergy with leading companies in the sector.

Cold forming

The cold forming process involves the deformation of the wire rod with diameters varying between 4 mm and 22 mm. Hanwant Auto Tech has various cold forming machines, from the classic 2-stage to the most recent 6-stations, including 4- and 5-stations with different tonnages to cover the widest possible range of products. Carbon steels (CB4FF, C18B, C23B, 30MnB3, 38NiCrMo4, 42NiCrMo4) and brass are processed.

Rolling

The department includes various machines for rolling diameters from M4 up to M20.

Secondary machining

We have special machines for:

  • Secondary machining to produce threaded holes
  • Secondary machining on semi-finished cold-formed parts
  • Bar machining on 2- and 3-axis CNC machines

Heat treatment

The in-house heat treatment department has always been one of the company’s strengths, to obtain mechanical characteristics with hardness classes of 8.8, 10.9 and 12.9.

Surface treatment

We collaborate with the main national suppliers in order to offer a finished product and provide the client with a complete service.

Sorting

Sorting machines allow us, on client request, to perform 100% checks on certain characteristics or critical measurements of the part.

Lab tests

The production process is constantly monitored, from the arrival of the raw material from the leading national and European providers to the packaging of the finished product. Dimensional checks are performed thanks to state-of-the-art machinery, and hardness and microhardness tests are carried out on products subjected to heat treatment.