Motors and electrical manufacturing
Housings, stators, bearings and gears, assembled by expansion rather than force.
Our team supports shrink fitting for motor production. We develop the heating process around the housing or assembly, interference fit, handling method and required cycle time.
Motor manufacturing is full of interference fits. A stator into a housing, a rotor onto a shaft, bearings onto both ends. Every one of them needs a fit tight enough to transmit load and stay concentric, and every one of them is damaged by being forced together.
Heating the outer component so it expands, assembling with clearance, and letting it contract onto the inner component solves that. It gives a tighter fit than a press could achieve, with no galling and no scoring of the fit surfaces.
Worth knowing
- The heating temperature has to be calculated from the designed interference, and kept safely below the tempering temperature of any heat-treated component in the assembly.
- Medium frequency is the right choice because uniform expansion through the section is what matters, not surface heating.
Related processes
- Induction shrink fittingAssembling interference fits by expanding the outer part instead of forcing it on.
- Induction brazingJoints that come out the same every time, because the heat is placed by a coil and timed by a machine.
- Induction bondingActivating an adhesive or bonding layer by heating the metal it is bonded to.
Related products
- Induction heating machinesIGBT power supplies from 5 kW to 500 kW, supplied standalone or built into a PLC or CNC controlled machine.
- Induction brazing machinesRepeatable brazed joints with heat placed only where the filler must flow. Single and double station.
- Handheld laser welding machinesFiber laser welders with low heat input, clean seams and little post-weld finishing.
Tell us about the part.
Send a drawing, the material, the case depth or temperature you need, and your production rate. Our engineers will help define the right machine for your process.