Full Series Roller Bearings

Product Model	Material	Inner Diameter (mm)	Outer Diameter (mm)	Thickness (mm)	Seal Type	Precision Grade
NU205	GCr15	25	52	15	Open	P6
NU206	GCr15	30	62	16	Open	P6
NU207	GCr15	35	72	17	Open	P6
NU208	GCr15	40	80	18	Open	P6
NU209	GCr15	45	85	19	Open	P6
NU210	GCr15	50	90	20	Open	P6
NJ205	GCr15	25	52	15	Open	P6
NJ206	GCr15	30	62	16	Open	P6
NJ207	GCr15	35	72	17	Open	P6
NUP205	GCr15	25	52	15	Open	P6
22205	GCr15	25	52	18	Open	P6
22206	GCr15	30	62	20	Open	P6
22207	GCr15	35	72	23	Open	P6
22208	GCr15	40	80	23	Open	P6
22209	GCr15	45	85	23	Open	P6
22210	GCr15	50	90	23	Open	P6
22308	GCr15	40	90	33	Open	P6
22309	GCr15	45	100	36	Open	P6
22310	GCr15	50	110	40	Open	P6
HK2010	GCr15	20	26	10	Open	P6
HK2210	GCr15	22	28	10	Open	P6
HK2512	GCr15	25	32	12	Open	P6
NK2020	GCr15	20	26	20	Open	P6
NA4905	GCr15	25	42	17	Open	P6
NA4906	GCr15	30	47	17	Open	P6
NU211	GCr15	55	100	21	Open	P6
NU212	GCr15	60	110	22	Open	P6
22211	GCr15	55	100	25	Open	P6
22212	GCr15	60	110	28	Open	P6
22311	GCr15	55	120	43	Open	P6
30205	GCr15	25	52	16.25	Open	P6
30206	GCr15	30	62	17.25	Open	P6
30207	GCr15	35	72	18.25	Open	P6
32006	GCr15	30	55	17	Open	P6
32207	GCr15	35	72	23	Open	P6
NU213	GCr15	65	120	23	Open	P6
22213	GCr15	65	120	31	Open	P6
HK3016	GCr15	30	37	16	Open	P6
NA4910	GCr15	50	72	22	Open	P6

Manufactured in China’s professional bearing industrial base, our roller bearings are ISO and CE certified. Featuring exceptional load capacity, high rigidity and reliable performance, they are engineered to meet the most demanding heavy-duty industrial and mechanical applications.

We offer a complete series of roller bearings, covering mainstream specifications including cylindrical roller bearings, tapered roller bearings, spherical roller bearings, and needle roller bearings, designed for applications such as construction machinery, mining equipment, gearboxes, and heavy-duty vehicles. Every bearing undergoes strict production processes and comprehensive quality inspections to ensure stable and reliable daily operation.

Our roller bearings deliver outstanding load-bearing capacity and impact resistance. Crafted from premium high-purity GCr15 bearing steel, each component is processed through high-temperature quenching and low-temperature tempering, achieving a final hardness of HRC60 ± 2. This forms a high-hardness, wear-resistant martensitic structure that significantly enhances surface strength and fatigue resistance. The line contact geometry between the rollers and raceways distributes contact stress evenly across the entire contact surface, eliminating localized overloading. This design allows the bearing to withstand extremely high radial loads, as well as combined radial and axial loads, with excellent impact resistance even in harsh operating conditions.

High rotational stability and low vibration are ensured through multi-stage precision grinding and superfinishing of every raceway and roller, achieving a surface roughness of Ra ≤ 0.2 μm. The ultra-smooth contact surface eliminates micro-jitter caused by uneven friction, ensuring consistent and quiet rotation. Internal clearances are precisely controlled during production, effectively reducing thermal expansion-induced preload changes under heavy loads and high speeds. This maintains stable rotational accuracy, minimizes energy loss, and significantly improves the overall operating efficiency of the equipment.

Enhanced wear resistance and extended service life are achieved through multiple design and material optimizations. The optimized logarithmic profile on the roller and raceway contact surfaces prevents edge stress concentration under heavy loads, reducing premature wear at the roller ends. High-quality anti-rust and extreme-pressure lubricating grease is used to form a durable protective oil film between contact surfaces. This film effectively reduces metal-to-metal friction while providing robust protection against moisture, dust, and corrosive substances, slowing wear and corrosion significantly. Even under continuous heavy-duty operation, the bearing maintains stable performance for extended periods.

Our roller bearings also offer wide temperature adaptability. Constructed with special heat-stabilized bearing steel and high-temperature-resistant lubricants, they maintain consistent performance across a temperature range of -40℃ to 150℃. Low-temperature stabilization treatment ensures minimal dimensional and clearance changes at high temperatures, preventing increased vibration, noise, or jamming caused by thermal expansion. This guarantees reliable operation in variable temperature environments, from cold storage equipment to high-temperature industrial machinery.

Widely applied in automotive transmissions, heavy trucks, excavators, mining machinery, steel mills, agricultural equipment, and large industrial transmission facilities, they serve as ideal high-cost-performance replacements for original imported bearings. We maintain adequate stock of standard models and support custom sizes and OEM services. Competitive factory-direct pricing, professional technical guidance, and reliable after-sales service have earned us recognition from customers worldwide.