HIWIN R16-5 T3 FSI Ball Screw Nut | High-Precision Linear Drive

The HIWIN R16-5 T3 FSI is a premium industrial-grade ball screw nut designed for high-performance linear drive systems. As part of the FSI series, it utilizes an internal return system (Single Nut with Flange), which allows for a more compact nut diameter compared to external return models, making it ideal for space-constrained CNC router axes and medical instrumentation. Engineered for high rigidity and minimal friction, the R16-5 T3 ensures repeatable precision and a smooth motion profile even under heavy axial loads. Manufactured from high-strength alloy steel with induction-hardened raceways, this nut is built to withstand the rigors of 24/7 industrial duty cycles while maintaining superior positional accuracy and reduced heat generation.

Genuine HIWIN craftsmanship for world-class linear accuracy
Internal return system for a compact and streamlined nut profile
High mechanical efficiency (over 90%) for reduced power consumption
Precision-ground raceways for ultra-smooth travel and low noise
Superior axial rigidity with optimized ball circulation
Durable dust-proof wiper system to protect internal ball tracks
Excellent reliability in high-speed CNC routing and milling

Engineering Analysis & Technical Data

Technical Parameter	Specification Details
MODEL NUMBER	R16-5 T3 FSI
NOMINAL DIAMETER	16 mm
LEAD PITCH	5 mm
BALL DIAMETER	3.175 mm
NUT TYPE	FSI (Internal Return Single Flange)
CIRCUIT ROWS	1x3 (T3)
ACCURACY GRADE	Rolled Standard (C7)
MECHANICAL	weight: 0.32 kg \| material: Hardened Alloy Steel (SCM415H) \| protectionRating: Standard Wiper Seal Integrated

Industrial Applications

Usage Scenario	Target Industry
Precision CNC Router Axes (X, Y, Z)	Machine Tool Manufacturing
Small-Scale Milling and Lathe Machines	Industrial Automation and Robotics
Medical Diagnostic and Scanning Equipment	Medical Technology and Instrumentation
Laboratory Automation and X-Y Tables	Precision Electronics Assembly
Packaging and Labeling Machinery	Furniture and Signage Fabrication
Industrial Robotics and Pick-and-Place Systems	General Engineering
3D Printing and Additive Manufacturing	General Engineering

Technical FAQ

What does the 'FSI' designation mean in HIWIN nuts?

FSI stands for Single Nut with Flange and Internal return. This design uses an internal tube or deflector for ball circulation, which keeps the nut's outer diameter smaller and more compact than external return models.

Is this nut compatible with all 1605 ball screws?

While it is designed for a 16mm diameter and 5mm pitch, we strongly recommend using it with HIWIN-branded rolled or ground ball screws to ensure the precise ball track matching required for optimal performance and longevity.

How should I maintain my HIWIN ball nut?

Regular lubrication is key. We recommend using a high-quality lithium-based grease. Maintenance intervals depend on the duty cycle, but typically, a re-greasing every 100km of travel or every 3-6 months is standard for industrial environments.

Detailed Overview of HIWIN R16-5 T3 FSI Ball Screw Nut | High-Precision Linear Drive

Advanced Engineering & Integration

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