R20-5T3-FSI

The R20-5T3-FSI is a Hiwin ground ball screw, designed for high-precision linear motion applications. Here’s a breakdown of the model number and what it signifies:

🔍 Hiwin R20-5T3-FSI Ball Screw Overview

Specification

Description

Model

R20-5T3-FSI

R

Rolled or Ground Type (typically “R” stands for rolled, but in some Hiwin models, it may indicate “Rotary” or a series type)

20

Screw shaft diameter (20 mm)

5

Lead (distance traveled per revolution) = 5 mm

T3

Precision grade: C3 (T3 is Hiwin’s way to denote high-accuracy, e.g. ISO class C3)

FSI

Flange Single Nut, Internal circulation type

⚙️ Features

• High Precision (C3 grade): Suitable for CNC machinery, semiconductor equipment, automation, and precision positioning.

• Lead 5 mm: Offers a balance between speed and thrust force.

• FSI Nut Design: Compact single nut with flange, internal circulation. Easy to mount and highly rigid.

• 20 mm Diameter: Provides good load capacity for medium-duty applications.

📐 Applications

• CNC Machines

• Semiconductor processing

• Robotics & Automation

• Precision Linear Stages

📦 Commonly Paired With

• Support Units (BK/BF 15 or FK/FF 15, depending on mounting)

• Nut Housings (per machine design)

• Couplings (20 mm shaft size matching motor shaft)