Ballscrew actuator that we ordered through Kiwi Motion looks and performs great. Swiss quality!
Well Specified Linear Actuators
The actuator runs smoother and quieter than previously used actuators. Also, it runs faster from start, so we can drive faster.

Superb service from start to finish
I can just tell Kiwi what I need and I can trust they will go away and sort the right product at the right time.

Well packaged Linear Shafts
Well packaged item, as described and dispatched quickly. Thank you
High Quality Linear Rail and Guides
We received the new components on the Wednesday afternoon and installed them the following morning. Parts were perfect and of great quality!
That you kindly for your assistance, fantastic service you’re running over there!

Product Details

Ø16mm CF53 Induction Hardened Linear Bearing Shaft- KM-W-16
Precision shaft for medium-load linear motion applications
The KM-W-16 16mm linear bearing shaft from Kiwi Motion is a high-precision component engineered to deliver consistent and smooth linear motion in medium-load applications.
With a diameter of 16 mm, this shaft offers an optimal balance between rigidity and weight, making it suitable for a wide range of industrial and automation systems.
Manufactured from high-quality CF53 steel, the KM-W-16 shaft undergoes induction hardening to achieve a minimum surface hardness of 60 HRC.
This hardening process enhances wear resistance, ensuring long service life even under continuous operation.
The 16mm linear bearing shaft is precision ground to an h6 tolerance, with roundness maintained within 5 µm and straightness within 0.20 mm per metre.
These tight tolerances guarantee a precise fit with linear bearings, facilitating low-friction and accurate linear movement.
Applications for 16mm linear bearing shaft
The 16 mm diameter KM-W-16 shaft is well-suited for medium-load applications across various sectors. Its robust construction and precise finish make it ideal for:
- 3D Printers
- CNC machines and milling equipment
- Automated assembly lines
- Robotic arms and manipulators
- Packaging and material handling systems
- Laboratory automation and testing apparatus
The shaft’s moderate diameter provides increased stiffness compared to smaller shafts, reducing deflection under load while maintaining manageable weight.
This makes it a versatile choice for both stationary and mobile systems requiring reliable linear motion.
Custom Lengths for Seamless Integration
Each 16mm linear bearing shaft is cut to the customer’s specified length, with a length tolerance of ±0.1 mm.
This precision cutting allows for easy integration into custom assemblies without the need for additional adjustments, streamlining the installation process and reducing downtime.
Additional end machining is available upon request.
Compatibility with Kiwi Motion’s Bearings and Supports
The 16mm linear bearing shaft is fully compatible with Kiwi Motion’s range of linear bearings and shaft supports. This compatibility ensures a perfect fit and simplifies the design and assembly of linear motion systems, contributing to long-term mechanical precision and reliability.
For medium-load linear motion applications requiring a combination of durability, precision, and ease of integration, the KM-W-16 linear bearing shaft offers an excellent solution.
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