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Nr. 50 100 12985 - Rev 003

Our company applies a precise and complex quality management system through the application of the ISO 9001-2015 standard.

This results in:

Most part of our spindles comply with the requirements set forth by the following standards

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.

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.

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.

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.


All our spindles can be marked with a customized logo or with the corresponding reference standards.

Laser marking

Marking by rolling

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.

Square spindle 8

Sharp edge

Square spindle 8

Edge n.1 - Radius 0.2

Square spindle 8

Edge n.2 - Radius 0.5

Square spindle 10

Edge n.3 - Radius 1.0


A careful choice and selection of materials and suppliers

Raw material selection

Quality of the raw material quality

Steel grades

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.

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.

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.

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).

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).

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.