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Sirem Gear Motors and IP44 Protection


Sirem have been at the forefront of industrial innovation for over 90 years now, manufacturing a wide variety of products including gearboxes, water tight motors, pumps and drum motors. Here we take a closer look at two of their most popular gear motor products, as well as explaining exactly what their IP44 certification means.

D Type – Asynchronous Sirem Gear Motor

This reversible Sirem gearbox with parallel gears is ideally suited for applications involving textile machines, rotary presses and liquid agitators. It features the titular asynchronous motor which is an electric motor driven by an alternating current created via the electromagnetic induction from the magnetic field of the stator (or stationary part of the rotary mechanic). Such asynchronous or induction motors are especially useful in certain applications due to their ability to be operated without a direct electrical connection to the rotor.

These D Type models of Sirem gear motors require lubrication with grease and can operate in temperatures as low as -20 degrees Celsius (-4 degrees Fahrenheit) and as high as 85 degrees Celsius (185 degrees Fahrenheit). Additional features include the thermal cut out, Class B insulation, and the option to rotate the rotor in two directions.

F Type – Asynchronous Sirem Gear Motor

This F Type model includes many of the same features of the D Type, such as the asynchronous or induction motor, the Class B insulation, thermal cut out, dual directional rotation functionality and the same range of operational temperatures. The main differences is in the shape which suits the F Type to different applications such as with ophthalmological machines and industrial rotisseries (as well as the usual liquid agitators).

Additionally, both of Sirem’s D Type and F Type asynchronous motors come with IP44 protection, which is explained below.

IP44 Protection

The IP Code, as it is commonly referred to, is a classification system that regulates the level of protection mechanical casings and electrical enclosures provide against a variety of intrusions such as accidental contact between parts, machine or human, as well as against the likes of dust, dirt and water. The IP stands either for International Protection or Ingress Protection (there seems to be some confusion as to which it is supposed to be), though the subsequent numbers determine exactly what kind of protection a particular device provides.

The numbers that follow the IP indicated what type of protection is offered by the certification, with the first and second number representing different articles. The first number of the code represents the protection afforded by the mechanical enclosure of the device with regard to the access it allows to hazardous parts such as electrical conductors or moving parts, as well as the potential for the insertion of solid foreign objects such as errant tools or even the operator’s fingers. In the case of the Sirem gear motors described above, the first 4 of the IP44 certification means there is at least 1mm of protection around the likes of wires inside the device and the slender screws holding the casing together.

The second digit of the IP Code represents the amount of protection a device provides against liquid contamination such as water spillage. In the case of the Sirem gear motors described above, the second 4 of their IP44 certification means they provide protection against the splashing of water against the mechanical enclosure from any direction.

If you need any Sirem gear motors or Sirem gearboxes, then contact YB Components who are the UK’s leading suppliers of industrial parts who can ship these parts all over the world.