Transformer winding mandrel description:
Expandable winding mandrels are definitely needed for winding transformer coils. Outer diameter is adjustable, motorized or manual expanded.
The diameter variation is big; taking-off is convenient, suitable for both horizontal winding machine and verticalwinding machine.


Specifications of expanding mandrel for power an ddistribution transformer
Code | Max. coil weight (t) | Expanding coil diameter range (mm) | Expanding coil diameter range with pad (mm) | No. of bars | Bar length (mm) | Total length (mm) |
KTM-1 | 1 | 160-200 | 210-310 | 6 | 1200 | 1500 |
KTM-2 | 2 | 200-300 | 310-410 | 6 | 1200 | 1500 |
KTM-3 | 3 | 300-400 | 410-510 | 6 | 1200 | 1500 |
KTM-4 | 4 | 400-500 | 510-610 | 8 | 1500 | 2000 |
KTM-5 | 5 | 500-600 | 610-710 | 8 | 1500 | 2000 |
KTM-6 | 6 | 600-700 | 810-910 | 12 | 2000 | 3000 |
KTM-7 | 8 | 700-800 | 910-1010 | 12 | 2000 | 3000 |
KTM-8 | 10 | 800-900 | 1010-1110 | 16 | 2000 | 3000 |
KTM-9 | 13 | 900-1000 | 1110-1210 | 16 | 2500 | 3700 |
KTM-10 | 16 | 1100-1200 | 1210-1310 | 20 | 2500 | 3700 |









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