Nachi 6904 (61904) deep groove ball bearing

Product detailed description

Nachi 6904 (61904) is a ball bearing manufactured by the Japanese company Nachi, which is known for its precision manufacturing and high quality. This bearing belongs to the category of deep groove ball bearings, which are characterized by their ability to carry both axial and radial loads.

The bearing has an inner diameter (d) of 20 mm, an outer diameter (D) of 37 mm and a width (B) of 9 mm. It is made of standard steel for rolling bearings, which guarantees its durability and long service life. The rolling elements, i.e. balls, are also made of standard steel, which contributes to the overall strength and reliability of the bearing.

The bearing cage is pressed from steel, which provides additional strength and stability during operation. The bearing is unsealed, which means that it is uncovered and suitable for applications where protection against dust or moisture is not required. The internal clearance is normal, which corresponds to the usual requirements for radial clearance in industrial applications.

The bearing is designed to operate in a temperature range from -20 °C to +120 °C, and can withstand temperatures up to +150 °C for short periods. The running accuracy is in class P0/PN, which corresponds to ABEC 1, and is suitable for applications where extreme accuracy requirements are not made.

The outer ring of the bearing is without a flange or groove and the hole profile is cylindrical, which allows easy assembly and disassembly in various design solutions. The bearing does not contain insulation against the passage of electrical current, which is important to consider in applications where electrical discharges may occur.

With a weight of 0.04 kg, the bearing is lightweight, which is advantageous for applications where minimizing the weight of the entire system is important. The Nachi 6904 is a single row bearing, meaning it contains one row of balls, and is suitable for a wide range of industrial applications where reliability and efficiency in load transfer are required.