Cemented Carbide Ball (Tungsten Carbide Ball)

Specifications

How to choose Ball

Points to check when selecting, with the values for this product (Cemented Carbide Ball (Tungsten Carbide Ball)).

1. 1. Select the material to suit the application

   Bearing steel is used for high-load bearings, stainless steel where corrosion resistance is required, and carbon steel for light-load, low-cost applications. For high-speed bearings or vacuum environments that require light weight, non-magnetic properties or electrical insulation, silicon nitride is suitable; resin and glass are candidates for applications in contact with chemicals or where anti-rust oil cannot be used.

2. 2. Determine the accuracy grade by required performance

   Grades are indicated as G3 to G1000 and others; a smaller number means smaller variation in sphericity and diameter. For low-noise, high-speed bearings such as machine tool spindles, select a smaller grade; for casters and light-load applications, select a larger grade to avoid over-specification.

3. 3. Check nominal diameter and inch designations

   The nominal diameters of listed products range from 0.3 to 101.6 mm. Many inch-based nominal diameters are also available, such as 1/4 inch = 6.35 mm, so confirm whether the design values are metric or inch, and specify a size that matches the raceway groove and cage dimensions.

4. 4. Evaluate rotational quality by sphericity and surface roughness

   Sphericity (2.5 to 25 μm for listed products) and surface roughness Ra (0.01 to 0.15 μm) directly affect vibration, noise and wear. When used as valve seals or reference spheres for measurement, confirm that these two values meet the required accuracy.

5. 5. Check hardness and operating temperature

   Hardness relates to wear resistance and resistance to indentation, and is indicated in HRC or HV. For high-temperature use, check the maximum operating temperature (288 to 1000 °C for listed products) and hot hardness. Cemented carbide and ceramics tend to retain hardness at high temperatures.

6. 6. Confirm whether secondary processing is possible

   Standard hardened steel balls are very hard, making drilling and welding difficult. For applications such as ball joints, where a shaft is welded to the ball or holes are drilled, select machinable products such as lightly carburized steel balls with shallower case depth, or cut balls with flat surfaces for retention.

This guide was written by AI based on the listed products' documents and specification items.

About Ball and all products

Description

Cemented carbide ball developed through technical cooperation with Tungaloy Co., Ltd. Holds a leading domestic supply record for ballpoint pen balls. RUBYLOY is a ballpoint pen grade with high corrosion resistance to oil-based and water-based inks.

FAQ

Q. What applications is the Cemented Carbide Ball (Tungsten Carbide Ball) used for?

A. It is used for ballpoint pens, ball bearings, measuring instrument terminals, watt-hour meter pivots, and similar applications. For ballpoint pens, RUBYLOY, which has high corrosion resistance to oil-based and water-based inks, is available.

Q. What are the material and content of the Cemented Carbide Ball (Tungsten Carbide Ball)?

A. W content is 87 to 90 %, Co content is 5 to 7 %, and C content is 5 to 7 %.

Q. Can the Cemented Carbide Ball (Tungsten Carbide Ball) be used in high-temperature environments?

A. Yes. It is a cemented carbide ball that maintains high hardness at high temperatures, with a high-temperature hardness of HV1500.

Q. How was the Cemented Carbide Ball (Tungsten Carbide Ball) developed?

A. It was developed through technical cooperation with Tungaloy Co., Ltd. It holds a leading domestic supply record for ballpoint pen balls.

Written by AI based on the content of the source documents.

Source documents

• Catalog ツバキ・ナカシマ精密ボール 製品カタログ 25 pages
  Found on: https://azuma-eg.com/catalogue/