Page 185 - UniorTools-Eng

A special procedure for the

manufacture of hammers

Hammer

1. Cutting: Cutting material is the "rst operation in the technological procedure of
wrench manufacturing. Optimum design of a cut provides optimal use of material.
2. Forging: Forging technology at Unior ensures excellent strength characteristics

of wrenches. Notably, it maintains appropriate "ber orientation in a forged part,
leaving it uninterrupted and the same as in a rolled blank. That characteristic of
forged parts is vital for achieving the characteristics of products exposed to heavy
and dynamic loads.

3. Trimming: Super&uous material around a forged part is removed using a special-
purpose trimming tool; material is trimmed to the desired shape, always making the
weight of trimmings as low as possible.

4. Broaching: The appropriate size of the hammer is achieved by broaching.

5. Heat treatment and sanding: Local heating and tempering of a hammer
on the impact surface ensures a high degree of hardness for the functional part
of Unior hammers. Annealing provides optimum microstructure and necessary
hardness on impact surfaces. That ensures a long service life of hammers.
6. Coating: The surface is protected by electrostatic coating.

Handle

The handle is made using selected ash tree wood with the required characteristics
in accordance with the DIN 68340 standard. It is protected with wax.

Forging part

7. Marking of a handle: Making the blue inscription, which also reminds the
user to handle the hammer correctly.

Assembly

8. Final assembly: The trained, skilled and meticulous workers performing the "nal
assembly will assemble the product into a solid whole that ensures the functioning
and high quality of the Unior hammers.

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