N20 Mini Vacuum Steel Ball Caster Wheel

N20 Mini Vacuum Steel Ball Caster Wheel serves as a critical omnidirectional steering component for small-scale robotic platforms and precision automated machinery. This compact caster utilizes a high-quality polished steel ball housed within a low-friction nylon or metallic socket to provide seamless movement in any direction. Consequently, it allows your mobile robot to pivot and navigate tight spaces without the mechanical complexity of traditional steered wheels. Furthermore, the “vacuum” design or recessed mounting style ensures a low center of gravity, which significantly enhances the stability of N20-motor-based chassis. Therefore, integrating this caster wheel into your DIY electronics project ensures a smooth, durable, and highly responsive mobility system.

Key Features:

• 360-Degree Rotation: The spherical ball design enables effortless movement in any horizontal direction, providing total freedom for robotic steering.
• Low Friction Operation: Polished steel construction minimizes rolling resistance, which reduces the load on your primary drive motors and extends battery life.
• Durable Build Quality: Built to withstand repetitive motion, the wear-resistant housing protects the internal ball from dust and debris interference.
• Easy Integration: Featuring standard mounting holes, this caster aligns perfectly with N20 geared motor brackets and small robot chassis kits.
• Compact Form Factor: The miniature size makes it ideal for desktop robots where space and weight are strictly limited.

Technical Specifications:

• Ball Material: Carbon Steel or Stainless Steel (Grade 200±)
• Housing Material: High-density Nylon or Nickel-plated Steel
• Load Capacity: ≈ 0.5 kg to 1.0 kg (Recommended static load)
• Rolling Resistance: ≤ 0.05μ
• Temperature Tolerance: −10°C to +60°C

Mechanical Specifications:

• Motion Type: Omnidirectional Rolling
• Mounting Type: Flange or Screw-hole mounting
• Ball Diameter: ≈ 8.0 mm to 12.0 mm
• Finish: Chrome-plated or smooth-molded plastic

Dimensions:

• Overall Height: ≈ 15.0 mm
• Mounting Hole Distance: ≈ 16.0 mm to 20.0 mm
• Base Width: ≈ 12.0 mm
• Total Weight: ≈ 5.0 g to 10.0 g

Pinout and Wiring:

• Mechanical Component: This product is a purely mechanical hardware item; however, it does not require electrical pinouts or wiring.
• Installation Tip: Mount the caster at the front or rear center of the chassis to act as a balance point for a two-wheeled differential drive system.
• Adjustment: Ensure the caster height matches the drive wheel height to maintain a level platform for sensors and electronics.

Datasheet Reference:

• Download Mini Steel Ball Caster Reference Guide

Commonly Used in:

• Educational Robot Kits: Found frequently in entry-level STEM kits for teaching autonomous navigation.
• Smart Cleaning Robots: Acts as the auxiliary support wheel for miniature vacuum cleaners and floor sweepers.
• Desktop Gadgets: Used in motorized displays and rotating laboratory equipment.

Applications:

• Line Following Robots: Provides the necessary pivot point for high-speed course corrections.
• Sumo Robots: Offers a stable, low-profile base that is difficult for opponents to flip.
• Automated Guided Vehicles (AGV): Serves as a balance wheel for small-scale warehouse transport prototypes.

Equivalent Models:

• Pololu 1/2″ Plastic Ball Caster: A lightweight alternative, although it may offer higher friction than the steel version.
• W420 Steel Ball Caster: A larger variant designed for heavier payloads.
• DFRobot Mini Ball Caster: A similar model with identical mounting dimensions for easy substitution.

Package Includes:

• 1 x N20 Mini Vacuum Steel Ball Caster Wheel