Slot Insulation Inserter
AutomatedSemi-automatic
Inserts slot-liner insulation into stator slots.
✓ Expert reviewed All content on this page has been reviewed by a senior motor engineer.
Selection criteria
Slot geometry range, cycle time, paper forming method.
Supply chain
Dongguan (Liaobu, Dongkeng, Huangjiang) and Shenzhen are a major cluster of motor-automation builders that make paper inserters to the customer's slot shape. Check changeover time between slot types and how the paper is formed and cut.
Buyer FAQ
- Which slot liner material should I use?
- DMD (polyester film + polyester non-woven) for class F, NMN or NHN (with aramid paper) for class H or higher reliability, and plain PET film for low-cost class B designs. Thickness is usually 0.15–0.3 mm for small motors.
- What does the machine have to do?
- Feed the insulation strip, crease and form it to the slot shape, cut it to length with cuffs (folded ends) if needed, and push it into each slot while the stator or armature indexes.
- What should I check on the inserted paper?
- Correct overhang at both ends (creepage distance), no tears or cracks at the creases, and the paper fully seated without blocking the slot opening for winding.
Where it is used
Motor assembly process
- 57 mm Inner-rotor BLDC Motor2. Stator insulation
- 42 mm Two-phase Hybrid Stepper Motor (NEMA 17)2. Stator insulation
- 57 mm Two-phase Hybrid Stepper Motor (NEMA 23)2. Stator insulation
- 86 mm Two-phase Hybrid Stepper Motor (NEMA 34)2. Stator insulation
- 57 mm Integrated BLDC Motor (built-in driver)2. Stator insulation
- AC Servo Motor (60–130 mm flange)2. Stator insulation
- IEC Three-phase Induction Motor (frames 80–160, IE3)5. Slot insulation, 6. Coil winding & insertion
- Linear Motor & Voice-coil Motor3. Coil insertion & connection
- Direct-drive Torque Motor & Robot Joint Module2. Segment insulation & winding