Installed stack
Include rotor retainers, end turns, encoder and axial running clearance in your thickness budget.
FRAMELESS / EMBEDDED
Frameless Pancake Motor Kits
Build the motor into your joint instead of building the joint around a motor. Rotor and stator kits leave bearings, housing and cable routing under your control.
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Before selecting a winding
Resolve the installed envelope first.
Shared bearings
Your bearing arrangement must control the rotor air gap under external loads.
Thermal interface
Define how the stator transfers winding heat into your structure.
Eliminate a second housing, retain control of the air gap
A frameless kit lets your mechanical structure support the rotor and locate the stator. That can reduce duplicated housings and bearing sets. It also transfers alignment, runout and retention responsibilities to the joint design. Start with the complete installed section, including adhesives, cable exits and encoder packaging.
A large bore starts with your harness, not a catalogue diameter
Send the cable bundle diameter, connector envelope, bend radius and joint travel. A bore that clears a loose wire may still block an assembled connector or abrade a moving harness. Agree the usable passage after sleeves, retention features and seals are installed.
Validate continuous torque in the actual joint structure
A motor-only torque figure does not establish joint performance. The housing material, stator fit and contact area determine heat removal. Prototype review should include winding temperature at duty, phase resistance, back-EMF, loaded runout and low-speed torque ripple. Acceptance limits belong on the agreed test plan.
Questions before freezing the drawing
Does the kit include a bearing or encoder?
Frameless denotes a rotor and stator integration scope. Bearings, encoder, brake and retention parts must be specified separately in the project drawing and quotation.
Can the bore and winding be changed together?
They can be reviewed together. A larger passage changes the available magnetic and winding space; feasibility requires geometry, voltage, speed and thermal information.