Electric Motor Parts – Applications of Steel Bright Bars
This application falls under the Automotive, Agri & Heavy Machinery segment, where bright steel bars are
used for precision rotating and load-bearing motor components.
In electric motors, bright bars are preferred due to their straightness, dimensional accuracy,
surface finish and predictable mechanical behaviour at high rotational speeds.
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Why Bright Steel Bars Are Used in Electric Motors
- Excellent straightness to minimise vibration and noise
- Tight dimensional tolerances for bearing and housing fits
- Superior surface finish for smooth rotation
- Consistent mechanical properties for high-speed operation
- Good machinability for keyways, shoulders and precision features
Typical Electric Motor Components Manufactured
- Rotor shafts
- Stator shafts
- Pump motor shafts
- Fan motor shafts
- Coupling shafts and drive extensions
Common Steel Grades Used
| Component | Typical Grades |
|---|---|
| Rotor & Stator Shafts | EN8D, C45 / EN8 |
| Pump & Fan Motor Shafts | EN8, EN19 |
| High-Speed Motor Shafts | EN19, 42CrMo4 |
Bright Bar Sections Commonly Used
- Rounds
- Precision ground rounds (where required)
- Custom shaft profiles as per drawings
Related Applications
- Tooling, Shafts & Power Transmission
- Automotive & Vehicle Components
- Industrial Machinery Components
Why Steelmet Industries?
- Consistent straightness suitable for high-speed rotating parts
- Controlled tolerances for bearing-critical applications
- Wide range of carbon and alloy steel grades
- VD route steels available for vibration- and fatigue-sensitive motors
- Testing and inspection support via NABL-certified laboratories
FAQs
Why is straightness critical in electric motor shafts?
Shaft straightness directly affects vibration, noise and bearing life in electric motors.
Which grades are commonly used for motor shafts?
EN8, EN8D and EN19 are commonly used depending on speed, load and fatigue requirements.
Can bright bars be used for high-speed motor applications?
Yes. Properly selected and machined bright bars perform reliably in high-speed electric motors.
Contact for Enquiries
For technical discussions, drawings or sourcing of bright steel bars for electric motor applications: