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100% own production

The unrivalled quality of TES springs is ensured by:
• using only the best raw materials,
• adherence to procedures and standards,
• high skills and experience of our staff,
• state-of-the-art technologies,
• certified European steel.

Before our springs reach the customer, they receive unique numbers and are then moved to our warehouse.The entire manufacturing process is rigorously controlled for quality and safety.

Production process

1
CUTTINGSee more
CUTTING

A flat bar is cut to dimensions indicated in the specifications.

2
ROLLINGSee more
ROLLING

A pre-programmed parabola is copied onto the leaf using a rolling machine.

3
HOLE DRILLINGSee more
HOLE DRILLING

Holes for the central screw, caps, bumpers, etc. are made.

4
FORMING OF EYESSee more
FORMING OF EYES

Openings for bushing mounting are formed using a dedicated machine by the renowned Hauser brand.

5
BENDING OF ENDSSee more
BENDING OF ENDS

The ends are bent to ensure smooth leaf operation, particularly important.

6
HEATING OF LEAVESSee more
HEATING OF LEAVES

The spring leaves are heated and annealed in the hardening temperature recommended for different spring steel types.

7
HARDENINGSee more
HARDENING

Rapid cooling in hardening oil to achieve an appropriate structure ensuring improved hardness and strength, and reduced plasticity.

8
TEMPERINGSee more
TEMPERING

Heating and annealing in an appropriate hardened steel temperature to eliminate unfavorable features: residual stresses and considerable brittleness.

9
SHOT PEENINGSee more
SHOT PEENING

Shoot peening consists in striking the tensile surface of the leaf spring with a high-speed stream of hard steel wire balls. This not only causes the spring's surface to harden but also eliminates pores and pits and prevents the formation of micro-cracks during its operation.

10
ASSEMBLYSee more
ASSEMBLY

The spring is equipped with bushings, bumpers, spacers, washers and other elements; the leaves are brought together by a pulling screw.

11
SETTING AND TESTINGSee more
SETTING AND TESTING

Improving the fatigue service life of the spring and verifying if its spring rate complies with the technical documentation.

12
PAINTING OF LEAVESSee more
PAINTING OF LEAVES

The spring is protected against corrosion by coating with a special paint.