Hand tools catalogue - Unior

5 Plumbing tools
158
A special procedure for the manufacture of plumbing tools
ADJUSTABLE JAW
1. Cutting: flat steel is cut into the right shape using a machine; the accuracy of the
cutting ensures the minimum consumption of quality material.
2. Forging: forging parts are made using drop forging technology. Drop forging allows
diverse ergonomic product shapes. The appropriate course of the fibres, already
present in the rolled blanks, is maintained using the appropriate forging processes.
3. Trimming: removing superfluous materials.
4. Broaching the serration: the appropriate geometry of the jaw serration is
produced using broaching technology. This ensures an optimum grip and resistance
to wear.
5. CNC working: the entire working of the jaw is done using CNC machines. Clamping
devices on the machines provide the accuracy required for the quality functioning of
the wrench.
6. Induction hardening: local heating and tempering of the jaw serrations ensures a
high degree of hardness of the functional part of the wrench. By hardening, we can
achieve the optimum microstructure and the required hardness, which ensure a long
service life for the jaws.
FIXED JAW
7. Cutting: flat steel is cut into the right shape using a machine; the accuracy of the
cutting ensures the minimum consumption of quality material.
8. Forging: forging parts are made using drop forging technology. Drop forging allows
diverse ergonomic product shapes. The appropriate course of the fibres, already
present in the rolled blanks, is maintained using the appropriate forging processes.
9. Trimming: removing superfluous materials.
10. Broaching the serration: the appropriate geometry of the jaw serration is
produced using broaching technology. This ensures an optimum grip and resistance
to wear.
ASSEMBLY
11. Riveting: the rivet provides a firm bond between both jaws.
12. Heat treatment (quenching and tempering) - heat treatment with hardening
and tempering is intended to improve the structure of the steel, to provide greater
hardness and toughness and other properties required to overcome the strain that
work with such products requires.
13. Induction hardening: local heating and tempering of the jaw serration ensures a
high degree of hardness of the functional part of the wrench. By hardening, we can
achieve the optimum microstructure and the required hardness, which ensures the
long service life of the Unior pipe wrench.
14. Coating: a protective colour is applied using powder coating technology, which
gives the product a professional look and also serves as surface protection.