A wrongly chosen motor means more than wasted money; it means faults, downtime and unnecessary energy use. We built this category so that you can make the right decision. Here you will find practical guides written from a manufacturer's field experience, explanations of key concepts and selection criteria. At HEM Motor our aim is not only to sell motors, but to determine the most suitable one together with you.
Some of the topics our content covers:
When choosing a motor, power, speed and efficiency should be assessed within the whole application rather than separately; a pump and a conveyor have very different needs. To clarify the speed and power combination, our power and speed options page is a good starting point. If you cannot find the information you need or remain undecided, tell us about your application and let our manufacturing engineers give you tailored technical guidance. Call +90 (532) 345 49 86 or write to us via our contact page.
The IEC frame number gives the height from the motor's foot base to the shaft centre in millimetres. In the HEM Motor sales range, the small frames between 63 and 112 mostly carry ... More Details
When replacing a motor in a tight installation space, the same IEC frame code alone is not a sufficient guarantee. The frame code defines shaft height, foot hole spacing and shaft ... More Details
When replacing a car lift motor, two checks cause more trouble than power and speed: how the hydraulic pump is attached to the motor and the duty regime in which the lift runs the ... More Details
When the motor of a press brake's hydraulic unit is replaced, flange and coupling compatibility is checked at three points: the new motor's flange must seat in the spigot recess an... More Details
Open up a CNC machining centre and you may find three motor families in one machine: a plain three-phase induction motor driving the chip conveyor, servo motors positioning the axe... More Details
On many machines that have run for years, the belt-and-pulley arrangement is questioned because of its maintenance burden: the belt stretches, needs re-tensioning, the pulley groov... More Details
When the motor of a geared drive fails, the gearbox is usually sound and stays in place; only the motor is replaced. In that case the new motor has to match two things at once: the... More Details
The conversation that wastes the most time in flange motor orders goes like this: someone says "we need a B5" or "we need a B14", the motor arrives, and the flange does not fit the... More Details
When a foot-mounted motor fails, a motor of the same power but with feet and flange (B35) may be available in stock or from a supplier. The question that comes to mind is simple: c... More Details
On marble grinding and polishing machines, the motor turns the head that carries the abrasive stones and often runs vertically with the shaft pointing down. For this reason, the fi... More Details
18.5 kW (25 HP) is the transition zone between small motors, which many plants start direct-on-line without any trouble, and large motors, whose starting method requires serious pl... More Details
This table shows the 25 different IEC frame sizes in the HEM Motor range and the power and speed of the motors available in each frame. The values are taken from the technical data... More Details
The torque values below are the catalogue values of HEM Motor’s own three-phase motors. Alongside the rated torque, we also give the starting and breakdown torque in Nm, calculated... More Details
The current values in this table are HEM Motor’s own technical values for the three-phase electric motors sold on our website; they are not a rule of thumb or another manufacturer’... More Details
A feed mill is installing a new horizontal mixer. The machine builder's data sheet gives exactly two lines: the mixer shaft turns at 45 rpm, and with a full trough it needs about 1... More Details
It is commissioning day. The electrician opens the terminal box and finds two thin leads next to the three power terminals: the PTC sensors embedded in the winding. The panel, howe... More Details
Picture a 37 kW extract fan running 6,000 hours a year with its outlet damper half closed. At the maintenance budget meeting, the proposal on the table is to upgrade the motor from... More Details
A centrifugal fan running backwards still moves air. Flow drops, current sits well below nameplate, and nobody notices. In a ventilation plant this can go undetected for months, un... More Details
The real test of a motor warranty comes on the day the failed motor is opened on a rewinder's bench. If one phase of the winding is charred, is that a manufacturing defect, or the ... More Details
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