40 - PVD 3674_GB_K Series_CE-November 2016.Docx
Rotor
Except for the smaller motors (K032 and K044), the ID of the rotor is usually larger
than the shaft diameter. An adapter sleeve (steel or aluminum) allows the rotor to be
mounted to the shaft. The rotor/sleeve assembly must be positioned on the shaft such
that the magnets are located in line with the stator assembly laminations.
If the version in which the commutation PCB assembly is bonded to the end turns is
being used, the commutation magnets must be located in proper proximity to the Hall
sensors on the PCB. Shows two methods for holding the rotor/sleeve on the shaft,
either with adhesive or by using a spring pin and retaining ring.
When using the adhesive method, a shoulder should be provided on the shaft to
properly locate the rotor/sleeve assembly.
When using the spring pin/retaining ring method, a slot must be provided in the
sleeve that will engage the spring pin in the shaft, thus properly locating the
rotor/sleeve assembly.
During assembly, be sure that the pin and slot are fully engaged.
Assemble rotor to shaft with a locational clearance fit of 0.013 mm to 0.038 mm
diametrical clearance.
Note: The following adhesives can be used for rotor and stator assembly (see figure
below). It is the integrator responsibility to check if it complies with his application and
to define the correct adhesives.
Loctite #325
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