Machined components for the public works sector

PSI specializes in precision machining for the construction machinery industry.

Starting from customer’s technical drawing, we manufacture in medium and large series.

Dimensions : from Ø40 to Ø900 mm


Machined parts in steel or cast iron for the public works sector

  • Heat engine part
  • Hydraulic motor part
  • Hydraulic pump part
  • Pulley
  • Piston
  • Casing
  • Valve
  • Structural part

The different steps of part machining for the construction machinery industry

We work according to the requirements of large contractors and proceed to the prototype, initial samples, PPAP phases then launch into series production and transmission of control reports.

Our control process includes a validation phase at the start of series, automatized control in production then final control before shipment (editing and transmission of a control report).

Our in-house manufacturing process: sawing, turning, milling, cutting, induction hardening (HF hardening), grinding, lapping allows us to guarantee parts with very high added value (location, position, parallelism, precise surface finish, etc.)

We machine all types of metals and have a perfect knowledge of foundry parts – FGL or FGS cast iron – or forge parts, but also all types of supplies such as bars or tubes.

The diversity and versatility of our machine park allows us to adapt to the majority of industrial needs.

Our experience as well as the complementarity of our machine park (turning, machining centresinduction hardening, grindingflat lapping, etc.) allow us to offer complete services through a partnership capable of providing technical and economic solutions by offering adaptations, different sources of supply (forging, foundry, laser cutting, flame cutting, etc.)

Integrating the entire production chain internally ensures responsiveness, technical mastery and quality, and proposals for economic optimization.

Types of blanks used for the manufacture of parts for the public works sector

  • Bars
  • Tubes
  • Forging
  • Foundry
  • Laser cutting
  • Flame cutting
  • Profile

Materials used for machined parts for the public works sector

  • Alloyed and non-alloyed steels
  • FGL and FGS grey cast iron
  • Stainless steel
  • Bronze
  • Brass
  • Aluminium
  • Bi-metal

Components for public works equipment motors

Manufacturer of poly-V pulleys diameter 107 to 220.

Cast iron blank

Production rate approximately 4,000 parts / year

Manufacturer of cast iron pulley for the public works sector

Piston family machining.

Cast iron blank

Production rate approximately 2,000 parts / year

Supplier of machined piston for public works engines

Public works equipment casing

Pump casings in cast iron with lamellar graphite, forged casings and cooling circuit jackets in cast aluminium.

Manufacturer of aluminium pump casing

Forged pump casing and vacuum pump shafts


  • Cast iron blank

Production rate:

  • ∼6,000 parts / year
hydraulic valve manufacturer

Hydraulic valve


  • Aluminium

Production rate: 3000 parts / year