The bearing 2*5*2, also known as MR52ZZ bearing, may have various names in the market due to different manufacturers and brands. However, its main dimensions and specifications remain consistent. It is a miniature deep groove ball bearing structure, with an inner diameter of 2MM, an outer diameter of 5MM, and a width of 2MM
Below are the common brands and corresponding part codes for the bearing 2*5*2 available in the market:
BLH bearing number: MR52ZZ
NSK bearing number: L520W02
NMB bearing number: L520ZZW52
NTN bearing number: BC2-5ZZ/682ZZ
Taking the MR52ZZ bearing from BLH as an example, let's introduce the process requirements for the 2*5*2 bearing
Steel and purity: High-end GcR15/SUJ2 steel has an oxygen content of ≤12PPM and contains few inclusions
Heat treatment technology: Separate quenching, deep cooling treatment, hardness HRC60~65, uniform stress
Accuracy level: P4/P5, roundness ≤ 0.3μm
Noise and Lifespan: Low noise, long lifespan, and excellent stability at high speeds
Batch consistency: Strict control, dedicated production lines, minimal batch variations, and stable quality
Cost advantage: The price is only half of that of major international brands
Other common issues with MR52ZZ bearings
Q: Are the dimensions of bearings 682ZZ and BC2-5ZZ the same?
Answer: The inner hole and outer diameter have the same size, but the width is different. When purchasing, it is necessary to confirm the drawing tolerance with the factory.
Question: What is the price difference between bearing 682ZZ and BC2-5ZZ?
Answer: Bearing 682ZZ is cheap, while BC2-5ZZ is very expensive. It is recommended to replace BC2-5ZZ with BLH's MR52ZZ
Q: Is there a significant difference in the service life between bearings MR52ZZ and BC2-5ZZ?
Answer: Under the same working conditions, the service life of these two models is the same.
Q: What are the rated speeds of bearings MR52ZZ and BC2-5ZZ respectively?
Answer: The rated speed of bearing MR52ZZ is 70000rpm, and the rated speed of BC2-5ZZ is 74000rpm. The limit speed for both models is 85000rpm. The design data is consistent, so they can be used interchangeably.
Question: What is the market demand for bearings MR52ZZ and BC2-5ZZ?
Answer: MR52ZZ is a popular and widely used product with stable demand and price. BC2-5ZZ has limited stock and is mainly customized, with a long delivery time.
