Xqh171 Self-Aligning Ball Bearing 1205K 25X52X15mm with Tapered Bore

• Customization: Available
• Rolling Body: Roller Bearings
• The Number of Rows: Double
• Model NO.: 1205K
• Outer Dimension: Medium and Large(120-190mm)
• Material: Bearing Steel
• Spherical: Aligning Bearings
• Load Direction: Axial Bearing
• Separated: Unseparated
• Product Name: Zwz Rolling Mill Used Bearings
• Original Packing: (a)Neutral Package & Wooden Package
• Delivery Date: Within 5 Working Days or According to You Request
• Features: These Bearings Are Featured by The Extremely
• Cage Material: Bearing Steel/Brass
• Main Market: Mideast;Canda;Southeast Asia;South America and Oth
• Quality Standard: ISO9001:2000
• Precision: P2/P4/P5/P6/P0
• Payment: Western Union, LC, Tt
• Uss: Metallurgical Industry Bearing
• Usage: Auto Mobile Manufacturing Heavy Truck Bearing
• Usage 2: Four Row Cylindrical Rolling Mill Bearing
• Type: Nu228-Nu256.Nu328-Nu334 Nu1028-Nu1056.Nu2228-Nu225
• Type-2: Nj1028-Nj1056.Nj2228-Nj2256.Nj2328-Nj2344
• Transport Package: Zwz Original Package
• Specification: CE ZWZ CO
• Trademark: ZWZ HRB LYC PAHP
• Origin: China
• HS Code: 84821090
• Production Capacity: 10000000000000000PCS/Year

Product Description

Product Description

Explorer & Super-TF Technology: Advanced material and manufacturing processes for extended service life, increased load capacity, reduced friction, and lower operating temperatures.
Ultra-High Precision & Reliability: Consistent performance meeting stringent JIS and ISO standards, ensuring maximum machine uptime and productivity.
Global Manufacturing Excellence: Produced in state-of-the-art facilities worldwide, guaranteeing consistent top-tier quality and supply stability.
Comprehensive Product Portfolio: One of the world's most extensive bearing ranges, offering solutions for virtually every industrial application.
Extensive Technical Expertise & Support: Backed by global engineering support network for application selection, maintenance, and troubleshooting.

Specification

Cylindrical roller bearing can be separated by single row,double rows, and four rows.
This kind of bearing can be submitted to high radial load and some axial load.
The rolling element of a cylindrical roller bearing is cylinder, the two ends of the external lines have the corrective slope which can eliminate the contact stress.
 NN and NNU design cylindrical roller bearing have high rigid and apply to machines such as milling

diameter         (mm)	Bearing Designation	Boundary Dimensions       (mm)					Basic Load Ratings        (N)		Limiting Speeds (rpm)
	Current Designation	d	D	B	rsmin	r1smin	Cr Dynamic	Cor Static	Grease
16	SZ-4101	16	44	8.3			15700	18000
17	N203	17	40	12	0.6	0.3	11400	9100	16000
	NJ203	17	40	12	0.7	0.3	11400	9100	16000
	NJ203ETN1	17	40	12	0.6	0.6	16900	13800	16000
	NU203	17	40	12	0.6	0.3	11400	9100	16000
	NU203ETN1	17	40	12	0.6	0.3	16900	13800	16000
	NJ2203E	17	40	16	0.6	0.3	22800	20300	13800
20	N204	20	47	14	1	0.6	15800	13100	13800
	NF204	20	47	14	1	0.6	15800	13100	13800
	NJ204	20	47	14	1.1	0.7	17000	14400	13800
	NU204	20	47	14	1	0.6	15800	13100	13800
	NU204/C3	20	47	14	1	0.6	14400	13100	13800
	N304	20	52	15	1.1	0.6	21800	17700	11400
	NJ304	20	52	15	1.1	0.6	21800	17700	11400
	NU304	20	52	15	1.1	0.6	21800	17700	11400
	NUP304ETN1	20	52	15	1.1	0.6	31500	26800	10600
	NJ2304ETN1	20	52	21	1.1	0.6	42000	38700	10000

Application Scenarios

High-Speed Machine Tool Spindles: Precision angular contact and cylindrical roller bearings for CNC machining centers and lathes.
Automotive Electrification: Specialized bearings for electric vehicle motors, reducers, and auxiliary systems.
Heavy-Duty Industrial Gearboxes: Spherical and tapered roller bearings for mining, cement, and steel processing equipment.
Home Appliance Motors: Low-noise, long-life deep groove ball bearings for washing machines, air conditioners, and vacuum cleaners.
Robotics and Automation: Thin-section, cross-roller, and harmonic drive bearings for precise motion control.

Company Profile

FAQ

Q: How to distinguish genuine NSK bearings from counterfeits?

  A: Check for sharp, clear laser-etched markings on the bearing rings. The packaging should be high-quality with clear printing. Purchase only from authorized NSK distributors and request certification if needed.

Q: What is the meaning of the suffix "DDU" in NSK bearings?

  A: "DDU" indicates Non-Contact Rubber Seals on both sides. This design offers excellent dust protection with very low friction and torque, suitable for high-speed applications.

Q: What is the difference between C0 and C3 clearance? When should I use C3?

  A: C0 is standard clearance. C3 is larger than C0. It is typically used in applications where the inner ring heats up significantly more than the outer ring (e.g., electric motors), preventing preload due to differential thermal expansion.

Q: Can NSK sealed bearings be re-lubricated?

  A: Generally, bearings with contact seals (e.g., DD, DDU) are not designed for re-lubrication as the seal can be damaged. Bearings with shields (ZZ) or non-contact seals (VV) sometimes allow for re-lubrication, but it's best to consult NSK technical documentation for the specific bearing type. Open bearings are designed for re-lubrication.