TECHNICAL AREA
Discover our quality policy
Certifications
Our quality is certified and controlled
View our quality policy
- High qualitative standards through accurate controls of the company management system
- Continuous improvements based on evidence
- Focus on customer needs
- Management of business relations
- A careful supplier selection and monitoring
- EN 1125
For panic-latches with horizontal exit bar
Panic-latches are mainly used for public areas where people are not familiar with the place and possible panic situations may occur, i.e. in public buildings with a large number of people.
Undoubtedly, the EN 1125 Standard effectively contributes to the protection of the humans life in emergency and panic situations.
- EN 179
For latches of the emergency exit doors with push handle and plate
Latches for emergency exits are used in areas where people are familiar with the place and no panic situations are expected, i.e. in residential buildings, offices or trade offices.
In this case, the Standard foresees that the people are well aware of the escape-ways and know how to use the emergency exits.
- EN 1906
For handles and doorknobs
The Standard outlines the ironmongery resistant to high stresses. The strong resistance and extreme loading capacity assure better safety in public buildings.
- EN 18273
For fire doors
The function of a fire door is to slow down the spread of a fire and to facilitate a quick evacuation in case of danger. In order to be able to fulfill this fire protection function, fire door handles must be manufactured according to the specifications of DIN 18273. This standard also applies to the components of the handles. In particular, as regards our production, the square spindle for handle must be in steel, it must have a cross section of 9 x 9 mm and consist of a single piece in the longitudinal direction.
Markings
All our spindles can be marked with a customized logo or with the corresponding reference standards.
Surface treatments
All our products can undergo a surface treatment by means of electrolytic zinc plating.
By this process, the surfaces of all our items undergo a homogeneous zinc coating in order to improve their resistance against corrosion and wear.
Another advantage offered by the electrolytic zinc plating is that this is a very low-environmental-impact treatment.
Thanks to this process you can get a light-blue layer on the electrolytic zinc deposit, which is obtained in an alkaline, cyanized or acid environment. This kind of passivation does not contain Hexavalent Chromium.
This liquid passivation is based on Trivalent Chromium, which enables to obtain a fine decorative light-blue finishing besides high resistance against corrosion of pure Zinc. Completely free from Hexavalent Chromium and oxidising agents.
By this passivation process based on Trivalent Chromium you can get an iridescent-coloured layer. Its protective capacity, also tested by the standard ASTM, UNI-ISO proved an average resistance beyond 120 hrs. before any occurrence of white corrosion outbreaks.
The thickness of the zinc layer which has deposited on the surface can vary according to requirements. Our standard layer ranges between 8 and 12 microns.
Dimensional tolerances on our workings
If no specification is given, our items are manufactured according to ISO 2768-1 standard, which prescribes the following tolerances.
We can respect further tolerances on customer request. Based on the indications on the technical drawings, products with different and / or more restrictive tolerances can also be manufactured
> 6-30 mm
± 0,2 mm
0-6 mm
± 0,1 mm
> 30-120 mm
± 0,3 mm
> 120-400 mm
± 0,5 mm
Dimensional tolerances for the drawn square spindle
All our spindles can be selected with the following dimensional tolerances
h 9
+0/-0,036 mm
h 10
+0/-0,056 mm
h 11
+0/-0,10 mm
Radius of the drawn square spindle
Some of our spindles can be supplied with rounded edge in order to avoid any problem upon assembling; on the contrary, some spindles have a sharp edge, in order not to have any clearance in the handle. Here under some examples
Viceverse, some spindle are sharp-edged to have no play in the handle. Here are some examples.
Materials
A careful choice and selection of materials and suppliers
- 11SmnPb37 (AVP) Steel
It is used by 99% of our customers, in compliance with UNI EN 10277-3:2000, steel no. 1.0737 with Rm da 510÷810 N/sq mm.
- 11SmnPb30 (LED 108) Steel
In compliance with UNI EN 10277-3:2000, steel no. 1.0718, with characteristics similar to the previous steel and a lower content of S by 0.27 -0.33%. Rm 510÷810 N/sq mm.
- 11Smn37 e 11SMn30 (AVZ) Steel
In compliance with UNI EN 10277-3:2000, steel no. 1.0736 and 1.0715 with characteristics identical to the previous steel but without Pb. Rm 510÷810 N/sq mm.
- 28SMnPb28 (PR60) Steel
In compliance with UNI EN 10277-3:2000. Special steel and produced according to our specifications to meet the requirements of the customers asking for higher mechanical strength compared to the previous grades; this steel can reach Rm 630÷890 N/sq mm and its structure is halfway between 11SMnPb37 (AVP) and 35SMnPb14 (PR80).
- 16MnCr5 Steel
According to UNI EN 10277-4:2000 Steel no. 1.7131. Typical casehardening steel to be used in exceptional cases when extreme surface hardness – also beyond 40 HRC- is required (approximate conversion Rm = 1300 N/sq mm).
- INOX Aisi 303 Steel
According to UNI EN 10088-3:2004 Steel no. 1.4305. This steel suitably combines good workability and excellent resistance to corrosion, it is used in particularly aggressive environments (close to the sea, in boats, chemical industries) Rm = 600÷890 N/sq mm.