Hook type without reinforced rings
Stable structure, high dimensional accuracy and long service life
Hook type
Raw material
- Commutator bars : copper
- Insulation between bars: mica
- Moulding compound: phenolic
- Reiforced rings: steel or fiber glass
- Bushings: Brass,steel metal material
Specifications
Chief techical parameters
| Name of the parameter | Specifications of commutator | Technical parameter | |
| Overspeed test | O.D less than 25.5mm | ROOM temperature:44000RPM,after 10min ,running ,deviation between segments≤0.003,O.D change≤0.007mm | |
| Heating 250℃44000RPM，after 10min ,running ,deviation between segments≤0.003,O.D change≤0.007mm | |||
| O.D 25.5mm-28.5mm | ROOM temperature:44000RPM,after 10min ,running ,deviation between segments≤0.003,O.D change≤0.007mm | ||
| Heating 250℃38000RPM，after 10min ,running ,deviation between segments≤0.003,O.D change≤0.007mm | |||
| O.D 28.5mm-32.5mm | ROOM temperature:37000RPM,after 10min ,running ,deviation between segments≤0.003,O.D change≤0.010mm | ||
| Heating 250℃35000RPM，after 10min ,running ,deviation between segments≤0.003,O.D change≤0.010mm | |||
| O.D 32.5mm-38.5mm | ROOM temperature:34000RPM,after 10min ,running ,deviation between segments≤0.003,O.D change≤0.010mm | ||
| Heating 250℃32000RPM，after 10min ,running ,deviation between segments≤0.003,O.D change≤0.010mm | |||
| Insulation withstanding test | Various specification | Room temperature: between shaft hole and commutator segment≥150MΩ | |
| Heating:140℃ within 1h , between shaft hole and commutator segment≥100MΩ | |||
| I.D tolerance of commutator | Various specification | With bushing H7 | Without bushing H8 |
| Inclination of commutator segment | Various specification | □≤1/3Nominal insulating thickness between the segment of coummtator | |
| AC frequency | Various specification | 50HZ | 60HZ |
Note:
- The volage-withstanding test’s date between the shaft and the segment of commutator and between the segments depends on the different motor application and different customers’ requirements.
- Negotiation may be taken if customers have other special requirements to the above date in the table.