STM Components is a tier 2 supplier that produce components manufactured by precision turning, milling, drilling and grinding. Mainly for automotive, hydraulic and railway sector.

STM offer a variety and flexible turning production with several type of machine. All products are made from round bars starting from Ø8 mm up to Ø80 mm. All mechanical processes are made in-house, and heat and surface treatments through supplier base.

In-house can be made, on all our products, cleanliness test based on the best automotive standards.

STM is IATF 16494:2016 and ISO 9001:2015 certified.

The final application of our products range from alternators, to brake systems, tensioning system, oil pumps and more. We produce rotor shaft, VCT, housing, pistons, pulley, spacer, sleeve, control valve, pivot.

STM is acting as partners to the large global players of the automotive sector.


Since 1998 STM supply as Tier 2 in automotive markets. We offer complex products and high volumes capability.

STM produce high-engineering products by turning, milling, drilling and grinding, designed by the customer or, alternatively, by in-house technical office.

We can offer in-house prototyping, sample productions, and PPAP, from low volumes products to high volumes product. We support the customer needs through all the steps needed to reach the SOP.

Our high quality standards could be performed through our in-house laboratory, at a controlled temperature. A wide variety of quality instrument support the production line to mantain high quality and reliable measurement. Our equipment range from profile projectors to pendulum, microscope, durometer, roughness, profilometer and many more in order to measure all the dimension we need in-house.

Our know how is center even on cleanliness level of our product, we can measure it through our cleanliness laboratory through test up to 10 µm filter – 300 µm max adm .length – 3mg max weight.

STM is able to offer support and solution for sustainable packaging and transportation. We manage returnable and non-returnable packaging, and according to customer need, consignment stock.

The technical office is composed of more than ten engineers and several software are used to design and analyze the customer’s drawing such as Tekla Structures and Cad-Cam. In fact once the drawings are received the engineers analyze each design details in order to industrialize the production.

The technical office of STM is the place where your products come to life. These can be projected by customer’s drawing or from the internal projecting and design. In fact, STM is able to offer customized solutions based on specific customer requirements.



The machinery installed at 30.000 sqm STM plant, with the help of 75 employees, ensure large quantities of supplies.

Following, some of our equipment typology:

Turning, milling and drilling:

  • CNC machining centers pallettizable
  • CNC Milling
  • CNC spot welders
  • CNC punching
  • Lathes
  • CNC lathes
  • Dual-head engine lathes
  • Multi-spindle automatic lathes (up to 8 axes)
  • Milling machines
  • Transfer machine
  • Centerless CNC trouhghfeed grinding machines
  • Centerless CNC plunge cut grinding machines
  • Centerless automatic plunge-cut grinding machines


  • 3D Dimensional control system
  • Profile projectors
  • Pendulum
  • Microscope
  • Durometer
  • Roughness
  • Profilometer
  • Roundness measurement instruments
  • Surface plates
  • Digital calipers and micrometers
  • Automatic polisher
  • Automatic hot mounting presses
  • Automatic metalcoating
  • Sawing
  • Automatic polisher
  • Automatic hot mounting presses
  • Automatic metalcoating Quality
  • Sawing


Decades of experience and advanced technology equipment allow STM to produce highly complex components in terms of tolerances and design. The extreme attention to details and materials ensures the satisfaction of customer needs and requirements.

Since decades the company is supplier of global players of the automotive sector with several milions parts produced per year.

Our main production range:

  • Shaft
  • VCT
  • Housing
  • Pistons
  • Pistons with teeth
  • Pulley
  • Spacer
  • Sleeve
  • Control valve
  • Pivot
  • Rotor Shaft (Brake System)
  • Pin

Final applications of our products range:

  • Brake system
  • Tensioning Systems
  • Alternators
  • Transmission system
  • Oil Pumps