A shaft rod transmits rotational or linear force between drive components — wheels, gears, pulleys, and couplers all mount onto the shaft and rotate with it. This Steel Shaft Rod with Dual Mounting Holes uses magnetic alloy steel, which combines the structural strength needed for drive loads with machinability that keeps the shaft straight and true across its 205mm length. At 5.5mm diameter, the rod fits standard 5mm and 6mm bearing inner rings with minimal clearance, which keeps lateral wobble out of wheel and gear assemblies mounted along its length.
The two mounting holes drilled near each end are the critical feature for robotics builds. Dual Mounting Holes for Robotics allow the shaft to fix into frame brackets, chassis side plates, and bearing blocks without relying solely on friction or set screws through couplers. That mechanical fastening prevents axial drift — where the shaft slides sideways under load and pulls the wheel or gear out of alignment. The polished corrosion-resistant surface finish reduces static friction at bearing contact points, allowing bearings to seat correctly without scoring the shaft surface during assembly.
The steel shaft rod suits wheeled robot drive axles, conveyor roller builds, and linear slide guide applications where shaft straightness and mounting rigidity matter. Available from StemVolt, this unit is suitable for engineers working on robotics drive systems and structural mechanics projects.
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Features:
- Magnetic alloy steel withstands high torsion and bending loads reliably.
- 205mm × 5.5mm fits standard robot bearings and chassis perfectly.
- Polished surface ensures smooth bearing rotation with reduced friction.
- Corrosion-resistant finish increases durability in demanding operating environments.
Technical Specifications:
| Specification | Details |
|---|---|
| Material | Magnetic Alloy Steel |
| Length | 205mm |
| Diameter | 55.5mm |
| Surface Finish | Polished, Corrosion-Resistant |
| Mounting Holes | 2 (Near Each End) |
| Color | Metallic Silver |
Applications:
- Steel Shaft Rod serves as drive axle in wheeled robot chassis builds
- Dual Mounting Holes for Robotics fix shaft into side plate bracket assemblies securely
- Steel shaft rod acts as conveyor roller shaft in material handling builds
- Robotics students mount wheels and gears on polished steel shaft for drive projects
Package Includes:
- 1 x 5.5mm x 205mm Steel Shaft Rod with Mounting Holes














Raghav Agrawal –
The steel shaft rod is a high-quality component for robotics, mechanical assemblies, and school competition projects.
Utkarsh Mittal –
Protective packing ensured safe arrival
Hriday Bansal –
Hassle-free delivery experience
Devansh Singhal –
Purchased for a robotics project and the product performed exactly as expected. Easy checkout, WhatsApp support, and secure packaging made the buying experience smooth and convenient.
Madhav Goyal –
Very happy with the purchase