[Related Material: K Series Motor Manual]
Parker's K series kit motors come as two pieces.
The first piece is the rotor, which consists of the yoke and the magnets (the yoke is the bored-out metal cylinder onto which the magnets are affixed). On some smaller motors, the rotor is also surrounded by a stainless steel sleeve to help the rotor run at high speed without the magnets coming loose.
The second piece is the stator, which consists of the iron laminate, the copper windings and the hall sensor board if that option was selected at the time of order.
The manual describes several methods by which the rotor and stator may be mounted on a machine. While there are several options, machine builders most commonly mount them using adhesive. For this purpose, Loctite 609 is easy to use and is capable of bearing the torque of the motor.
When applying Loctite, it is important to ensure that the entire contact surface (i.e. stator laminate to mounting sleeve or rotor yoke to motor shaft) is coated. This helps to ensure shear stresses caused by motor torque are evenly distributed. For further directions, refer to the manual for Loctite 609.
We are occasionally asked about other mounting methods, specifically press fitting and thermal fitting since these are methods many machine builders use to fit other components.
The K series motors are not designed to bear axial load, so press fitting them is likely to cause damage. Rotor magnets may come loose from the yoke and the stator may become distorted by the force required for a press fit.
Thermal fits are also dangerous because the rotor magnets can be demagnetized if they get too hot. Externally heating or cooling the stator is also not recommended.
In general, do not attempt to press fit or thermal fit K series motors. In cases where you need a permanent bond, Loctite 609 offers high strength and uncomplicated installation.