NSK Bearing Cross Reference Chart and Interchange Guide

Bearing Manufacturer & Supplier

Specialize in ball bearings, roller bearings, thrust bearings, thin section bearings etc.

Follow me on:

NSK Bearing Cross Reference Chart and Interchange Guide

As a world-renowned bearing manufacturer, NSK manufactures hundreds of thousands of bearing models. However, due to the wide variety of bearing brands on the market, the bearing models of different brands are not completely unified. Therefore, in the actual application of bearings, it is particularly important to understand and master the cross-reference chart and interchangeability of NSK bearings.

Table of Contents

Overview of NSK bearings

NSK was founded in 1916 and is the first company in Japan to manufacture bearings. Today, NSK has become one of the world’s leading bearing manufacturers, and its products cover deep groove ball bearings, cylindrical roller bearings, tapered roller bearings, spherical roller bearings, thrust bearings and other types, which are widely used in automobiles, machine tools, aviation, industrial machinery, precision machinery and other fields. NSK bearings are known for their high precision, high reliability and long life, and can meet various demanding application requirements.

Bearing materials and heat treatment technology

NSK bearings are made of high-quality chrome steel. This material has high strength, high wear resistance and good fatigue resistance. NSK further improves the performance of bearings through advanced heat treatment processes such as carburizing, nitriding and surface quenching. Carburizing treatment can increase the hardness of the bearing surface, thereby improving its wear resistance and fatigue resistance; nitriding treatment forms a hard nitride layer on the bearing surface to enhance its corrosion resistance; surface quenching treatment can improve the surface hardness and wear resistance of the bearing.

Lubrication technology

Lubrication is crucial to the performance and life of bearings. NSK provides a variety of lubrication solutions, including oil lubrication, grease lubrication and solid lubrication. Different application scenarios have different requirements for lubrication methods. For example, high-speed rotating equipment usually chooses grease lubrication, while heavy-load equipment is suitable for oil lubrication. NSK has also developed high-performance greases, such as NSK LUBE, which can maintain good lubrication effects under high temperature, high speed and heavy load conditions, and extend the service life of bearings.

Precision manufacturing and quality control

The manufacturing process of NSK bearings is strictly carried out in accordance with international standards, using high-precision processing equipment and testing instruments to ensure that the dimensional accuracy and performance parameters of each bearing meet the design requirements. NSK’s quality control system covers every link from raw material procurement to product delivery. Through multiple testing methods, such as non-destructive testing, metallographic analysis and life testing, it ensures that each bearing shipped has excellent quality and reliability.

Necessity of bearing cross reference chart

During the maintenance of mechanical equipment, you may encounter the situation where you need to replace a certain brand of bearings with NSK bearings. At this time, the bearing cross reference chart is particularly important. It can help you quickly find the corresponding models between different brands to ensure that the selected bearings can fully meet the performance requirements of mechanical equipment. Aubearing has summarized the NSK bearing cross reference chart based on many years of bearing manufacturing experience and many years of NSK bearing sales experience. In this way, you can easily find the replacement model of the required bearing and avoid equipment failure and loss caused by model mismatch.

Single Row Deep Groove Ball Bearings National Cross Reference

Description		Interchange
Description		NSK	SKF	TORR/FAF	FAG	MRC	NTN
Part Number	Inch	Rxx	Rxx	SxxK	Rxx	Rxx	Rxx
	Extra small	6xx	6xx	3xK	6xx	3x	6xx
	Extra Light	60xx	60xx	91xxK	60xx	1xxK	60xx
	Light	62xx	62xx	2xxK	62xx	2xxS	62xx
	Medium	63xx	63xx	3xxK	63xx	3xxS	63xx
	Extra thin section	68xx	618xx	—	618xx	18xxS	68xx
	Very thin section	69xx	619xx	93xxK	619xx	19xxS	69xx
	Thin section	16xxx	16xxx	—	16xxx	—	—
	Maximum capacity, light	BL2xx	2xx	2xxW	2xx	2xxM	BL2xx
	Maximum capacity, medium	BL3xx	3xx	3xxW	3xx	3xxM	BL3xx
	Cartridge type	633xx	—	W3xx	—	3xxC	633xx
	Cartridge type	632xx	—	W2xx	—	2xxC	632xx
Part Number Suffix	Two seals (non contact)	VV	2RZ	—	—	—	LLB
	Two seals (contact)	DDU	2RS1	PP	2RSR	ZZ	LLU
	One seal (contact)	DU	RS1	P	RSR	Z	LU
	Two shields	ZZ	2Z	DD	2ZR	FF	ZZ
	One shield	Z	Z	D	ZR	F	Z
	Snap ring	NR	NR	G	NR	G	NR
	Steel cage	blank	J	blank	blank	blank	blank
	Brass cage	M	M	MBR	M	BRZ	L1
	Heat stabilized 200C	X28	S1	—	S1	—	PREFIX TS3
	Tight clearance	C2	C2	H	C2	Tight	C2
	Normal clearance	blank	blank	R	blank	Nomal	blank
	Loose clearance	C3	C3	P	C3	Loose	C3
	Extra loose clearance	C4	C4	J	C4	Extra Loose	C4
	Electric motor grade	E	QE6	—	—	—	—

Angular Contact Ball Bearings National Cross Reference

Description		Interchange
Description		NSK	SKF	TORR/FAF	FAG	MRC	NTN
Part Number	Light	72xx	72xx	72xx	72xx	72xx	72xx
	Medium	73xx	73xx	73xx	73xx	73xx	73xx
	Heavy	74xx	74xx	74xx	74xx	74xx	74xx
Part Number Suffix	40° contact	B	B	WN	B	PJ	B
	30° contact	A	—	—	—	BLANK	BLANK
	25° contact	A5	ACD	—	E	—	—
	15° contact	C	CD	—	C	R	C
	MACHINED BRASS CAGE	M	M	MBR	MP	BRZ	L1
	PRESSED BRASS CAGE	Y	Y	BLANK	YP	—	—
	POLYAMIDE CAGE	TY	P	PRC	TVP	BKE	T2
	STEEL CAGE	W	J	—	JP	BLANK	J
	FLUSH GROUND FACES	G	G	BLANK	UO,UA	DU	G
	PETROCHEMICAL	BMPC	BECBM	—	—	PumpPac*	—

Double Row Ball Bearings National Interchange

	NSK	SKF	TORR/FAF	MRC	NTN
Part Number	SELF-ALIGNING, EXTRA NARROW	12xx	12xx	—	—	12xx
	SELF-ALIGNING, NARROW	13xx	13xx	—	—	13xx
	SELF-ALIGNING, WIDE	22xx	22xx	—	—	22xx
	SELF-ALIGNING, EXTRA WIDE	23xx	23xx	—	—	23xx
	DOUBLE ROW, MAXIMUM COMPLIMENT, LIGHT	32xx	52xxE	52xxW	52xxM	32xx
	DOUBLE ROW, MAXIMUM COMPLIMENT, MEDIUM	33xx	53xxE	53xxW	53xxM	33xx
	DOUBLE ROW, CONRAD, LIGHT	52xx	52xxA	52xxK	52xxC	52xx
	DOUBLE ROW, CONRAD, MEDIUM	53xx	53xxA	53xxK	53xxC	53xx
Part Number Suffix	TWO SEALS	2RS	2RS1	PP	ZZ	LLU
	TWO SHIELDS	ZZ	2Z	DD	FF	ZZ
	SNAP RING	NR	NR	G	G	NR
	POLYAMIDE CAGE	TNG	TN9	PRB	—	T2
	STEEL CAGE	J	BLANK	BLANK	BLANK	J
	TAPERED BORE	K	K	—	—	K
	EXTRA CAPACITY	E	E	—	—	—
	TIGHT CLEARANCE	C2	C2	H	C2	C2
	NORMAL CLEARANCE	BLANK	BLANK	R	BLANK	BLANK
	LOOSE CLEARANCE	C3	C3	P	C3	C3
	EXTRA LOOSE CLEARANCE	C4	C4	J	C4	C4

Cylindrical Roller Bearings Cross National Reference

Description		Interchange
Description		NSK	SKF	FAG
Part Number Prefix	SINGLE ROW, NO FLANGES ON OUTER RING	N	N	N
	SINGLE ROW, NO FLANGES ON INNER RING	NU	NU	NU
	SINGLE ROW, 1 FLANGE INNER	NJ	NJ	NJ
	SINGLE ROW, 1 FLANGE OUTER	NF	NF	—
	SINGLE ROW, 1 FLANGE INNER, WITH RETAINING RING	NUP	NUP	NUP
	SINGLE ROW, 1 FLANGE INNER w/STABALIZING RING	NH	NH	NH
	STABILIZING RING	HJ	HJ	HJ
	DOUBLE ROW, FLANGES OUTER/FANGES INNER	NNU/NN	NNU/NN	NNU/NN
Part Number	LIGHT	2xx	2xx	2xx
	MEDUM	3xx	3xx	3xx
	HEAVY	4xx	4xx	4xx
	EXTRA LIGHT	10xx	10xx	10xx
	LIGHT, WIDE	22xx	22xx	22xx
	MEDIUM, WIDE	23xx	23xx	23xx
Part Number Suffix	POLYAMIDE CAGE	T	P	TVP2
	COMPOSITE HIGH TEMP (200F) CAGE	T7	—	—
	MACHINED BRASS CAGE	M	M	M,M1
	PRESSED STEEL CAGE	W,WS	J	JP1
	HIGH CAPACITY DESIGN	E	EC	E
	FULL COMPLEMENT (NO CAGE)	V	V	V
	TIGHT CLEARANCE	C2	C2	C2
	NORMAL CLEARANCE	BLANK	BLANK	BLANK
	LOOSE CLEARANCE	C3	C3	C3
	EXTRA LOOSE CLEARANCE	C4	C4	C4

Spherical Roller Bearings National Cross Reference

Description		Interchange
Description		NSK	SKF	TORR/FAF	FAG
Part Number	VERY LIGHT	239xx	239xx	239xx	239xx
	LIGHT	230xx	230xx	230xx	230xx
	LIGHT, WIDE	240xx	240xx	240xx	240xx
	MEDIUM	231xx	231xx	231xx	231xx
	MEDIUM, WIDE	241xx	241xx	241xx	241xx
	HEAVY	222xx	222xx	222xx	222xx
	HEAVY, WIDE	232xx	232xx	232xx	232xx
	EXTRA HEAVY	213xx	213xx	213xx	213xx
	EXTRA HEAVY, WIDE	223xx	223xx	223xx	223xx
Part Number Suffix	BRONZE CAGE, ONE PIECE, GUIDE RING	CAM,AM	CA,CACM	YM	M
	BRONZE CAGE, TWO PIECE, GUIDE FLANGE	M	MC	BR	MB
	STEEL CAGE, TWO PIECE, GUIDE RING	C,CD	CJ,CC	CJ,VJ	BLANK
	POLYAMIDE CAGE, TWO PIECE	H	—	VCF	TVPB
	TAPERED BORE 1:12	K	K	K	K
	TAPERED BORE 1:30	K30	K30	K	K30
	CARBURIZED STEEL, COMPLETE BEARING	g	ECD	W40	W209
	CARBURIZED STEEL, INNER RING ONLY	g3	ECB	W40I	W209B
	LUBE GROOVE & HOLES OUTER RING	E4	W33	W33	S
	LUBE GROOVE & HOLES OUTER RING, INNER RING	E7*	W513	W33W94	SH40AB
	HOLES ONLY OUTER RING	E3	W20	W20	SY
	HOLES INNER RING & GROOVE	E5	W26	W94	H40AB
	NO RELUBE FEATURES	BLANK	BLANK	BLANK	—
	PLUGS PROVIDED FOR OUTER RING HOLES	E42	W77	W84	H40
	COMBINATION W33, W4, W31	E4P55	C08507	C08W33W4W31	—
	COMBINATION W33, W31	E4U22	W506	W33W31	—
	COMBINATION W33, W26, W31	E7U22	C08W509	W33W94W31	SH40A
	OUTER RING WITH EXTRA CLOSE RUNNING ACCURACY	P52	C04	C04	T52BN
	INNER RING WITH EXTRA CLOSE RUNNING ACCURACY	P53	C02	C02	T52BE
	INNER AND OUTER RING W/EXTRA CLOSE RUNNING ACCURACY	P55	C08	C08	T52BW
	SPECIAL INSPECTION MEASURES	U22	W31	W31	—
	INNER RING AND OUTER RING HEAT STABILIZED TO 200°C	S11	S1	—	—
	TIGHT CLEARANCE	C2	C2	C2	C2
	NORMAL CLEARANCE	BLANK	BLANK	BLANK	BLANK
	LOOSE CLEARANCE	C3	C3	C3	C3
	EXTRA LOOSE CLEARANCE	C4	C4	C4	C4

High Precision Angular Contact Ball Bearings Interchange

Description		Interchange
Description		NSK	*OLD NSK	SKF	FAG	BARDEN	OLD BARDEN	FAFNIR	SNFA	NTN
Part Number	ULTRA LIGHT SERIES	79xx	79xx	719xx	719xx	19xx	–	93xxWI	B	79xx
	EXTRA LIGHT SERIES	70xx	70xx	70xx	70xx	1xx	1xx	91xxWI	X	70xx
	LIGHT SERIES	72xx	72xx	72xx	72xx	2xx	2xx	2xxWI	2	72xx
Part Number Suffix	15° CONTACT ANGLE	C	C	CD	C	C	BLANK	2*	1	C
	25° CONTACT ANGLE	A5	A5	ACD	E	E	2*	3*	3	–
	POLYAMIDE CAGE	TYN	TY	–	–	TMT	–	PRC	P	T2
	PHENOLIC CAGE	TR	T	BLANK	T	TA	BLANK	CR	C	T1
	SEALS	V1V	–	S*	2RSD OR S PREFIX	RR	–		/S	–
	DUPLEX UNIVERSAL	DU	DU	DG	DU	DU	D	DU	DU	GD2
	SINGLE UNIVERSAL	SU	SU	G	U	U	–	SU	U	G
	EXTRA LIGHT PRELOAD	EL	EL	–	–	–	–	X	–	GL
	LIGHT PRELOAD	L	L	A	L	L	L	L	L	GN
	MEDIUM PRELOAD	M	M	B	M	M	M	M	M	GM
	HEAVY PRELOAD	H	H	C	H	H	H	H	H	GH
	CERAMIC BALLS	SN24	SN24	HC	HCB*	C*	–	C*	/NS	5S*
	ABEC 7 PRECISION	P4Y	P4	P4A	P4S	BLANK	BLANK	MM*	7	P4
	ABEC 9 PRECISION	P2	P2	PA9A	–	ABEC9	ABEC9	MMX*	9	P2

Ultra High Precision Angular Contact Ball Bearings Cross Reference

Description		Interchange
Description		NSK	*OLD NSK	SKF	BARDEN	FAFNIR	SNFA	NTN
Part Number	ULTRA LIGHT ROBUST HIGH SPEED SERIES	XXBNR19	XXBNC19	719XXCE	ZSB19XX	93XXW0,WN,HX	VEBXX	HSB9XX
	EXTRA LIGHT ROBUST HIGH SPEED SERIES	XXBNR10	XXBNC10	70XXCE	ZSB1XX	91XXW0,WN,HX	VEXXX	HSB0XX
	ULTRA LIGHT ROBUST HIGH SPEED SERIES FOR GRINDING SPINDLES	XXBGR19	XXBNT19	–	–	–	–	BNT9XX
	EXTRA LIGHT ROBUST HIGH SPEED SERIES FOR GRINDING SPINDLES	XXBGR10	XXBNT10	–	XXBX48	–	–	BNT0XX
Part Number Suffix	POLYAMIDE CAGE	TYN	TY	BLANK	TMT	PRC	P	–
	PHENOLIC CAGE	TR	T	–	T	CR	C	BLANK
	DUPLEX UNIVERSAL	DU	DU	DG	DU	DU	DU	D
	SINGLE UNIVERSAL	SU	SU	G	U	SU	U	BLANK
	EXTRA LIGHT PRELOAD	EL	EL	–	–	X	–	GL
	LIGHT PRELOAD	L	L	A	L	L	L	GN
	CERAMIC BALLS	H	SN24	HC	C*	C*	/NS	5S*
	STEEL BALLS	S	BLANK	BLANK	BLANK	BLANK	BLANK	BLANK
	ABEC 7 PRECISION	P4Y	P4	P4	BLANK	MMV*	7	P4
	ABEC 9 PRECISION	P2	P2	P2	ABEC9	MMX*	9	P2

Precision Cylindrical Roller Bearings Cross Reference

Description		Interchange
Description		NSK	*OLD NSK	SKF	FAG	NTN
Part Number	ULTRA LIGHT DOUBLE ROW CYLINDRICAL SERIES	NN39XX	NN39XX	–	–	–
	EXTRA LIGHT DOUBLE ROW CYLINDRICAL SERIES	NN30XX	NN30XX	NN30XX	NN30XX	NN30XX
	EXTRA LIGHT SINGLE ROW CYLINDRICAL SERIES	N10XX	N10XX	N10XX	N10XX	N10XX
Part Number Suffix	NON-METALLIC CAGE	TB	T	TN,TN9	–	–
	BRASS CAGE	MB	M	BLANK	M	G1
	TAPERED BORE	KR	K	UPK	K	K
	LUBE GROOVE AND HOLES ON OUTER RING	E44	–	W33	S	–
	MATCHED CLEARANCE, RINGS NOT TO BE MIXED	CCX	CCX	CX	CX	CXNA
	ABEC 7 PRECISION	P4	P4	SP	SP	P4

Thrust Angular Contact Ball Bearings Cross Reference

		NSK	*OLD NSK	SKF	NTN
Part Number	30° ANGULAR CONTACT THRUST BEARINGS	XXBAR10	XXBA10	BTMXXA	HTA0XXADB
Part Number	40° ANGULAR CONTACT THRUST BEARINGS	XXBTR10	XXBT10	BTMXXB	HTA0XXDB
Part Number Suffix	POLYAMIDE CAGE	TYN	TY	BLANK	T2
	PHENOLIC CAGE	TR	T	–	T1
	DUPLEX UNIVERSAL	DU	DU	DB	GD2
	SINGLE UNIVERSAL	SU	SU	–	G
	EXTRA LIGHT PRELOAD	EL	EL	–	–
	LIGHT PRELOAD	L	L	A	GN
	CERAMIC BALLS	H	SN24	HC	5S*
	STEEL BALLS	S	BLANK	BLANK	BLANK
	ABEC 7 PRECISION	P4A	P4A	P4A	P4
	ABEC 9 PRECISION	P2A	P2A	PA9A	P2

Notes on NSK bearing interchange

National Bearing interchange refers to replacing the original bearing of a certain brand in the equipment with NSK bearing. In order to ensure the smooth progress of the interchange, the following aspects need to be considered comprehensively:

Size matching

The size of the bearing is one of the most important factors in the interchange process. It mainly includes three parameters: inner diameter, outer diameter and width. When interchanging, it is necessary to ensure that the three dimensions of the NSK bearing are exactly the same as the original bearing, otherwise the bearing may not be installed or run unstably, resulting in downtime or other dangers.

Load capacity

The load capacity of the bearing includes radial load, axial load, dynamic load, static load, etc. Different application scenarios have different requirements for the load capacity of the bearing. When interchanging, it is necessary to ensure that the load capacity of the NSK bearing is at least equivalent to that of the original bearing.

Speed requirement

The speed capacity of the bearing is also one of the important factors to be considered during the interchange process. Different types of bearings have different maximum speed limits. When interchanging, it is necessary to ensure that the NSK bearing can meet the maximum speed requirements of the equipment to avoid equipment damage caused by insufficient speed.

Material and lubrication

The material and lubrication method of the bearing will also affect its performance and life. NSK bearings are made of high-quality chrome steel and advanced heat treatment process, with excellent wear resistance and fatigue resistance. When interchangeable, it is also necessary to consider the matching of lubrication methods to ensure the good operation of the bearings.

Actual case analysis

In order to better understand the cross-reference and interchange of NSK bearings, the following is an analysis of an actual case.

Case background

A textile mill used a SKF deep groove ball bearing, model 6208, in its cloth winding machine. The bearing was worn after long-term high-load operation and needed to be replaced. In order to improve the operating stability and life of the equipment, it was decided to replace it with an NSK bearing.

Cross-reference search

By consulting the cross-reference table of NSK bearings, it was found that the NSK model corresponding to the SKF 6208 bearing was 6208. It is also a deep groove ball bearing with completely matched size parameters.

Interchange implementation

During the replacement process, the equipment was first thoroughly inspected to confirm that the dimensions of the bearing seat and shaft were fully compatible with the NSK 6208 bearing. Subsequently, the NSK bearing was installed in accordance with the standard operating procedures and fully lubricated. After the installation was completed, a trial run was carried out, and the equipment ran smoothly without abnormal noise and vibration.

Results and evaluation

After a period of operation monitoring, the NSK 6208 bearing performed well, which not only effectively improved the operating stability of the equipment, but also extended the maintenance cycle of the equipment and reduced maintenance costs. This bearing interchange achieved good results.

Conclusion

NSK bearings occupy an important position in the industrial field with their excellent performance and reliability. By understanding and mastering the cross-reference table and interchangeability of NSK bearings, you can help you choose the most suitable bearings during equipment maintenance and replacement. The use of the bearing cross-reference table and the implementation of bearing interchangeability require comprehensive consideration of multiple factors such as size, load capacity, speed requirements, material and lubrication.

FAQ

Why is cross-reference and interchange of NSK bearings important?

With so many brands and models of bearings on the market, understanding cross-reference and interchange of NSK bearings can help find compatible replacement bearings from NSK when maintaining or repairing equipment, thereby ensuring the performance requirements of the equipment and avoiding equipment failures.

What should I pay attention to when performing a bearing swap?

Size matching: Make sure that the inner diameter, outer diameter and width of the NSK bearing match the original bearing.
Load capacity: Make sure that the radial, axial, dynamic and static load capacity of the NSK bearing is at least equivalent to that of the original bearing.
Speed requirement: Make sure that the NSK bearing can meet the maximum speed requirements of the equipment.
Material and lubrication: Make sure that the material and lubrication method of the NSK bearing match those of the original bearing.