Series Purchasing

Commodities series purchasing

  • Types:

Tension spring and pressure spring, spiral spring, torsion spring, flexible spring, plate spring

  • Materials:

Spring steel, nickel alloy, produced from strip material or wire

  • Heat treated
Gearboxes and gear wheels
  • Gearboxes transmited and converted:

Rotation direction
Rotational speeds

  • High precision:

Grinding, lapping, broaching, honing, turning, milling
Toothing quality 1-12
Running smoothness (NVH)
Complex toothing forms
Different transmission ratios

  • Gear wheels produced by:

Moulding (casting, sintering)
Forming (forging, stamping)
Heat treatment

Cam shafts

Serve for valve control and cause a lengthwise movement of the valve due to a rotational movement.

The different cam profiles produce different valve timings.

  • Produced from:

Forging blank
Chilled cast iron
Out of the barre
Multi piece
Turning, milling, grinding, heat treated

connecting rod

In crank drive, the con-rod connects the crankshaft and the piston, converting the rotation into a linear movement. There are one-piece and split con-rods

  • Produced from:
    Forging blank
    Sintered materials
    Case-hardened steel, heat treated steel, microalloyed steel

Cracking, milling, grinding, honing, heat treated

tubes (steel)

Seamless and welded pipes are bent to yield complex shapes and they are partially connected with other components (hoses).

These parts serve to transport coolants as well as fuels and lubricants.

forging blanks steel
  • Crankshaft
  • Camshaft
  • Con-rod
  • Gears

Forging blanks are generally used to make sure that components do not need to be produced from solids.

Case-hardened steel, heat treated steel, microalloyed steel

What is important here, is that the forgings are 100% free of cracks.

sintered parts, mim parts, precision castings
  • Gears
  • Cam followers
  • Valve seat rings
  • Valve guides
  • Index disks

Very high precision, small tolerances and complex geometries are possible, thus in some cases no further machining is required.


Valvetrains consist of a high number of various components:

  • Valve
  • Taper collet piece
  • Valve guide
  • Valve seat ring
  • Valve spring
  • Valve spring retainer
  • Bucket tappet with and without HVA [hydraulic lash adjustment]
  • Cam follower
  • Rocker arm with and without roller
  • Timing chain
  • Chain tensioner
  • Timing sprocket
  • Variable cam phaser
  • Cam shaft

These components are made of a wide variety of materials.

roller bearings and plain bearings
  • Applications:
    Crank shaft bearing
    Con-rod bearing

are available as standard parts and designed parts

aluminium parts
  • Applied processes:

High pressure die casting, gravity die casting, Lost Foam, forged aluminium, we also use sand casting and rapid prototyping techniques for prototypes

  • Aluminium components include:

Cylinder head, cylinder crankcase – cylinder blocks - cylinders (with various cylinder running surfaces), gearbox casings, oil sumps, valve covers, engine brackets, cam shaft bearing bridges, water pump bodies, various cover

  • Surface treatment:

Powder coating
EDT painting (Epoxy and Acrylic)
Hard anodizing
Blasting methods

The components are mainly purchased as finished parts, but raw parts as well.

modular systems
  • Turbocharger
  • Oil-water-heat exchanger
  • Oil pumps and fuel pumps
  • Fuel filters and oil filters
  • Oil coolers
  • Intercooler

Modular parts are purchased as complete parts.

sheet metal and stamped parts

Thrust washers, exhaust systems, cylinder head gasket, oil lines, support plates, oil baffles, retaining plates, support structures, oil containers, petrol and oil pipes, various pipes

  • Production processes:

Laser cutting, water jet cutting, punching, deep drawing, pressing.

  • Surface treatment:

Coated, galvanised, chrome-plated, vibratory finishing

chemicals, oil and lubricants
  • Gearbox oil and engine oil
  • Grease
electric and electronic system
  • ECU incl. software
  • Fuse box
  • Turbo control unit
  • Sensors
  • Transformers
  • Solenoid valves
  • Spark plugs
  • Electric starters
  • Ignition coil
  • Magnetic wheel
  • Generators
  • Wiring harness assembly
injectors and trhottle valve
  • Injectors
  • Throttle bodys with and without Drive-by-Wire, constant pressure carburettors
pistons and piston pins

Pistons, piston rings

  • Production processes:

Gravity casting, forging, machining, coatings for pistons and piston rings

Diameter: 54 – 100 mm


Piston pins and crankpins

  • Production processes:

Machining and cold extrusion
Diameter: 15 – 30 mm

plastic parts and rubber parts

Plastic components:

  • Production processes:
    Plastic injection moulding
    Reinforced and unreinforced plastics (mainly PA6)
    filling materials are is glass fibre and/or mineral fibre

  • Special characteristics:
    Inserts, vibration welding, assembly groups

Airbox, plenum, manifold, valve cover, water pump housing, water pump, gears, chain tensioner blade, covers, fuel rail, variator cover, oil tank, oil level gauge

Rubber components:

  • Production processes:
    Extrusion, injection moulding, compression moulding

Moulded seals, hoses, moulded hoses (for oil and water), rubber dampers, membranes, intake manifold (with injection-moulded armouring

c parts
  • Washers, springs, screws, retaining rings, clamps, cable ties
  • Parts with lower cost, but with a considerable procurement effort.
  • Catalog parts and also parts built to print.
  • Materials: steel and non-ferrous metals as well as plastics, rubber.
turning parts
  • Shafts, washers, pins
  • Turning parts made of steel, non-ferrous metals and plastics.
  • Very tight tolerances, heat treatments and also corrosion protection