outline

Precision miniature ball is a ball less than 1/8 inch (3 mm) in diameter. They are usually made of stainless steel or chromium, so they are durable in various applications. They are used in places where high precision is required, such as medical, automotive or electronic industries.

Micro ball application

We provide billions of precision mini balls for many industries such as automobile, aerospace, medical, dental, electronics, health and beauty, as well as other applications requiring small ultra-precision balls, including:

Medical and industrial mobile phones

Flowmeter

Fuel control

Gyro, synchronizer and steering gear

electric machinery

Cryogenic cooler

Lung assist device

features

Hartford provides miniature bearing balls, including chrome (52100) and stainless steel 440C, 300 series, 302, 304 and 316.

Ball size

The size range of micro precision ball is from 1mm to 3mm, and the grade is from 10 to 50. The sphericity of Grade 10 ball is only one millionth of an inch (0.00001 "), which is the highest precision ball we have produced.

The ability of Hartford miniature ball

In 2020, Hartford opened a professional, modern and most advanced miniature ball facility in China. Here, we can process chrome (52100/GCr15) or 440C balls, from 1mm to 3mm, and grades from 10 to 50. The factory has passed ISO 9001 certification and can process 100 metric tons of steel balls every year.

Micro ball equipment is equipped with machines for each step of micro ball processing, including cold heading, small and large flash, heat treatment (hardening) and tempering furnace, high pressure hardness tester and demagnetization equipment. The Hartford factory also provides the most advanced ultrasonic cleaning and 360 ° 100% inspection of the ball surface using precision vision equipment.