1.5V 3V 5V DC R140 Miniature Vibration Motor DIY Small Engine For Fan Massager

Product Name: R140 Vibrating Motor Micro DC Motor

Features: High speed, strong magnetic

Direction:CCW/CW

Voltage: 1.5-6V

Current:0.14-0.91(A)

Output:0.16-1.62(W)

Single Motor Speed:1000- 8000(RPM)

Motor Step Height:1.7mm

Motor Body Length:25mm

Motor Diameter:21mm

Screw Holes Distance:10mm

Srew Holes Size:2mm

Shaft diameter: 2mm

Shaft length: 8mm/10mm Or Custom as your need.

Vibration Parts: Two Types of Shape can be chose.

Application:DIY Engine,Fan,Massager

RE-140/R140 High Speed DIY Motor Dimension

R140 Vibration Motor Working Principle – How Vibration is Generated

To help your company better understand our product, the following explains the working principle of the R140 vibration motor, along with the key components involved in generating vibration.

1. Vibration Generation Principle

The vibration of the R140 vibration motor is generated by centrifugal force created from the rotation of an eccentric mass (eccentric weight). The eccentric mass is mounted on the motor’s output shaft. When the motor drives the shaft to rotate at high speed, the mass, whose center of gravity does not align with the shaft, produces periodic centrifugal force, resulting in vibration.

Centrifugal Force Formula:
F = m × r × ω²

Where:

• F = centrifugal force
• m = mass of the eccentric weight
• r = eccentric distance (distance between the center of mass and the shaft center)
• ω = angular velocity (related to the motor’s RPM)

Vibration Frequency:
The vibration frequency is directly related to the motor’s rotation speed (RPM).
For example, if the motor rotates at 12,000 RPM, the vibration frequency is:
12,000 ÷ 60 = 200 Hz

2. Key Components and Their Functions

• Eccentric Weight (Eccentric Rotor):
  Mounted on the motor shaft, this is the core component for generating vibration. Its eccentric design produces centrifugal force during rotation, creating the vibration effect.

• Motor (Electric Drive):
  Provides the driving force to rotate the eccentric weight at high speed.

• Bearings:
  Support the output shaft, ensuring smooth rotation and minimizing mechanical noise and wear.

• Housing (Enclosure):
  Protects internal components and transmits vibration to the external device or equipment.

3. Impact of Different Eccentric Weight Designs on Vibration Frequency and Performance

The design of the eccentric mass, including its weight (m) and eccentric distance (r), significantly affects the vibration intensity and amplitude:

• Heavier Eccentric Mass (Higher m):
  Generates stronger centrifugal force and higher vibration intensity. However, it also increases motor load and power consumption.

• Larger Eccentric Distance (Higher r):
  Also increases vibration force but may result in higher imbalance or noise if excessively large.

• Custom Shapes of Eccentric Weights:
  Non-standard shapes (e.g., asymmetric or sector-shaped weights) can create directional or customized vibration effects, suitable for specialized applications.

Note: The vibration frequency is determined by motor speed (RPM), but the vibration amplitude and tactile sensation are mainly influenced by the eccentric mass design.

4. How to Choose the Right R140 Vibration Motor

When selecting a suitable R140 vibration motor, consider the following factors:

If you need more detailed selection assistance, we can offer tailored recommendations based on your application (e.g., massage motors, portable vibration devices, industrial vibrators). We also provide customized eccentric weight designs and motor performance optimization services.