Interchange – Single Row Ball Bearings

	Description	NSK	SKF	Torr / Faf	FAG	MRC
P/N	Inch	Rxx	Rxx	Sxx	Rxx	Rxx
	Extra small	6xx	6xx	3x	6xx	3x
	Extra light	60xx	60xx	91xxK	60xx	1xxK
	Light	62xx	62xx	2xx	62xx	2xxS
	Medium	63xx	63xx	3xx	63xx	3xxS
	Extra thin section	68xx	618xx	–	618xx	–
	Very thin section	69xx	619xx	93xxK	619xx	–
	Thin section	16xxx	16xxx	–	16xxx	–
	Maximum capacity, light	BL2xx	2xx	2xxW	2xx	2xxM
	Maximum capacity, medium	BL3xx	3xx	3xxW	3xx	3xxM
Suffix	Two seals (contact)	DDU	2RS	PP	2RSR	ZZ
	One seal (contact)	DU	RS	P	RSR	Z
	Two shields	ZZ	2Z	DD	2ZR	FF
	One shield	Z	Z	D	ZR	F
	Snap ring	NR	NR	G	NR	G
	Steel cage	BLANK	J	BLANK	BLANK	BLANK
	Brass Cage	M	M	MBR	M	BRZ
	Heat stabilized 200C	X28	S1	–	S1	–
	Tight clearance	C2	C2	H	C2	Tight
	Normal clearance	BLANK	BLANK	R	BLANK	Normal
	Loose clearance	C3	EM(C3)	P	C3	Loose
	Extra loose clearance	C4	C4	J	C4	Extra Loose
	Electric motor grade	E	QE6	–	–	–

Interchange – Double Row Ball Bearings

	Description	NSK	SKF	Torr / Faf	MRC
P/N	Self-aligning, extra narrow	12xx	12xx	–	–
	Self-aligning, narrow	133xx	13xx	–	–
	Self-aligning, wide	22xx	22xx	–	–
	Self-aligning, extra wide	23xx	23xx	–	–
	Double row, maximum compliment, light	32xx	52xxE	52xxW	52xxM (K)
	Double row, max. compliment, medium	33xx	53xxE	53xxW	53xxM (K)
	Double row, conrad, light	52xx	52xxA	52xxK	52xxC(SBK)
	Double row, conrad, medium	53xx	53xxA	53xxK	53xxC (SB)
Suffix	Two seals	2RS	2RS1	–	–
	Two shields	ZZ	2Z	–	FF
	Snap ring	NR	NR	G	G
	polyamide cage	TNG	TN9	pRB	–
	Steel cage	J	BLANK	BLANK	BLANK
	Tapered bore	K	K	–	–
	Extra capacity	E	E	–	–
	Tight clearance	C2	C2	H	C2
	Normal clearance	BLANK	BLANK	R	BLANK
	Loose clearance	C3	C3	p	C3
	Extra loose clearance	C4	C4	J	C4

Interchange – Angular Contact (ABEC 1 & 3) Ball Bearings

	Description	NSK	SKF	Torr / Faf	FAG	MRC
P/N	Light	72xx	72xx	72xx	72xx	72xx
	Medium	73xx	73xx	73xx	73xx	73xx
	Heavy	74xx	74xx	74xx	74xx	74xx
Suffix	40 deg. contact	B	B	WN	B	pJ
	30 deg. contact	A	–	–	–	BLANK
	25 deg. contact	A5	ACD	–	E	–
	15 deg. contact	C	CD	–	C	R
	Machined brass cage	M	M	MBR	Mp	BRZ
	pressed brass cage	Y	Y	BLANK	Yp	–
	polyamide cage	TY	p	pRC	TVp	BKE
	Steel cage	W	J	–	Jp	BLANK
	Flush ground faces	G	G	BLANK	UO,UA	DU
	petrochemical	BMpC	BECBM	–	–	pumppac*

Glossary – Cylindrical Roller Bearings

NU style single row – NU style bearings have two machined flanges on the outer ring and no flanges on the inner ring.
N Style single row – N style bearings have two machined flanges on the inner ring and no flanges on the outer ring, with rollers and cage on the inner ring. Like the NU style, the N has no thrust load carrying capability.
NJ style single row – NJ style bearings have two machined flanges on the outer ring and a machined flange on one side of the inner ring. The roller and cage assembly is in the outer ring. The integral flange on the inner ring allows this bearing to carry an axial load.
NF style single row – NF style bearings have two machined flanges on the inner ring and one flange on the outer ring, with roller and cage on the inner ring. Like the NJ bearing, these bearings have some thrust load capability.
NH style single row – NH style bearings have two machined flanges on the outer ring and a machined flange on one side of the inner ring. A special-design inner ring allows use of a stabilizing ring on the non-flange side. As a result, these bearings can carry axial loads in both directions. The roller and cage assembly is mounted in the outer ring.
NUP style single row – NUP style bearings are similar to the NJ style and come with a special ring often called a thrust collar. Mounted on the non-flange side of the inner ring, the thrust collar allows the bearing to carry an axial load in both directions. The thrust collar extends out of the bearing on one side, so the dimension across the inner ring is slightly greater than that of the outer ring.
Double row styles (NN, NNU) – Double Row cylindrical roller bearings are denoted by two N’s within the part number (e.g., NN or NNU). The dimensions for these can be found in the Super Precision section of this catalog and can be ordered with standard precision.
S-Type – Sealed-Clean Bearings for chain conveyors demonstrate a high efficiency under high temperatures and wet conditions for a longer period with an improved sealing system. These bearings are packed with a quality grease of high thermal resistance and durability.
Continuous Caster Roller Bearings – These are 2-split bearing units of a highly reliable design and feature a long service life. Cylindrical roller bearings with self-aligning rings having a proper alignment function.
Four Row Cylindrical Roller Bearings – Are also popular roll neck bearings providing several benefits. First, the inner ring is separable form the outer ring and rollers which allows the inner ring to remain with the roll during grinding processes. This assures precise concentricity and negligible run-out providing for high rolling accuracy. Secondly, this design allows for greater radial load carrying and higher operating speeds. Four row cylindricals must be used in combination with a thrust bearing which is usually a two row taper, angular contact ball bearings, or a deep groove ball bearing depending on the thrust load present.

Interchange – Cylindrical Roller Bearings

	Description	NSK	SKF	FAG
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
	Double row, flanges outer/flanges inner	HJ	HJ	HJ
		NNU/NN	NNU/NN	NNU/NN
P/N	Light	2XX	2XX	2XX
	Medium	3XX	3XX	3XX
	Heavy	4XX	4XX	4XX
	Extra Light	10XX	10XX	10XX
	Light, Wide	22XX	22XX	22XX
	Medium, Wide	23XX	23XX	23XX
Suffix	Ployamide cage	T	P	TVP2
	Composite high temp (200°C) 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

Glossary – Spherical Roller Bearings

Spherical Roller Bearings – Are double row self-aligning bearings capable of carrying heavy radial loads combined with moderate thrust loads in either direction. They are extremely resistant to shock loads and their self-aligning feature allows full capacity loading despite shaft deflection.
Continuous Caster Rollers – These are 2-split bearing units of a highly reliable design and feature a long service life. Cylindrical roller bearings with self-aligning rings having a proper alignment function.
Spherical Roller Bearings TL Series – Excellent performance with high temperture equipment. High strength to prevent inner ring fractures.
Shaker Screen Bearings – Are designed for vibrating applications such as screens, feeders and compactors. These are self-aligning spherical roller bearings designed to accommodate the high loads, static and dynamic misalignment characteristics, and severe environmental conditions inherent in these applications.
Triple Ring Bearings – Are specially designed for use with controlled crown rolls used extensively in the paper industry. These high load capacity bearings provide “shaft within shaft” operation, while simplifying the surrounding structure and installation.

Interchange – Spherical Roller Bearings

	Description	NSK	SKF	Torr/FAF	FAG
P/N	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
Suffix	Bronze case, 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	W401	W209B
	Lube groove & holes outer ring	E4	W33	W33	S
	Lube groove & holes outer ring, holes inner ring	E7	W513	W33W94	Sheading0AB
	Holes only outer ring	E3	W20	W20	SY
	Holes only inner ring	E5	W26	W94	heading0AB
	No relube features	BLANK	BLANK	BLANK	–
	Plugs provided for outer ring holes	E42	W77	W84	heading0
	Combination W33, W4, W31	E4P53	W507	W33W4W31	–
	Combination W33, W31	E4U22	W506	W33W31	–
	Combination W33, W26, W31	E7U22	W509	W33W94W31	Sheading0A
	Outer ring w/extra close running accuracy	P52	C04	C04	T52BN
	Inner ring w/extra close running accuracy	P53	C02	C02	T52BE
	Inner & outer ring w/extra close running accuracy	P55	C08	C08	T52BW
	Special inspection measures	U22	W31	W31	–
	Inner ring & 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

Glossary – Tapered Roller Bearings

Four Row Tapered Roller Bearings Are very popular for use on roll necks. Most of these bearings are composed of two double cones (four Inner ring raceways), a cone spacer, two single cups (one at each end), one double cup (the center two raceways in the outer rings), and two cup spacers. They are very effective at operating under heavy radial and axial loads at low to moderate speeds. NSK four row tapered bearings are standardly supplied with carburized rings and rollers and are compatible with industry standards. “Sealed-Clean” bearings are four row tapers with seals for the harshest of operating environments. NSK’s patented design provides the optimum sealing efficiency with only a slight loss of capacity.
Two Row Tapered Roller Bearings Are very common as the back-up thrust bearing in a rolling mill or as the roll neck in lighter duty rolling mills. Two row tapers are designed in a variety of styles for different applications. Converging bearings (TDI, TDIE, TDIS) consist of one double cone and two single cups possibly with a cup spacer. Diverging bearings (TDO, TDOD, TDOC) consist of two single cones, a cone spacer, and one double cup.

Interchange – Inch Tapered Roller Bearings

	Description	NSK	SKF	Timken	FAG
Prefix	Extra heavy	EH	EH	EH	KEH
	Heavier than heavy	HH	HH	HH	KHH
	Heavy	H	H	H	KH
	Heavy medium	HM	HM	HM	KHM
	Medium	M	M	M	KM
	Light medium	LM	LM	LM	KLM
	Light	L	L	L	KL
	Lighter than light	LL	LL	LL	KLL
	Extra light	EL	EL	EL	KEL
Cup Angle	0° to 23°59’59.99	1xxxx	1xxxx	1xxxx	1xxxx
	24° to 25°29’59.99	2xxxx	2xxxx	2xxxx	2xxxx
	25°30′ to 26°59’59.99	3xxxx	3xxxx	3xxxx	3xxxx
	27° to 28°29’59.99	4xxxx	4xxxx	4xxxx	4xxxx
	28°30′ to 30°29’59.99	5xxxx	5xxxx	5xxxx	5xxxx
	30°30′ to 32°29’59.99	6xxxx	6xxxx	6xxxx	6xxxx
	32°30′ to 35°59’59.99	7xxxx	7xxxx	7xxxx	7xxxx
	36° to 44°59’59.99	8xxxx	8xxxx	8xxxx	8xxxx
	45° up, but not thrust only conforms to AFBMA standard case carburized cup & cone	9xxxx	9xxxx	9xxxx	9xxxx
		R
		G

Interchange – Metric Tapered Roller Bearings

	Description	NSK	SKF	Timken	FAG
P/N	High capacity design	HR	–	–	–
	Light	HR302xx	302xx	302xx	302xx
	Medium	HR303xx	303xx	303xx	303xx
	Medium, steep angle	HR303xxD	313xx	313xx	313xx
	Extra light, wide	HR329xx	329xx	329xx	329xx
	very light, wide	HR320xx	320xx	320xx	320xx
	Light, wide	HR322xx	322xx	322xx	322xx
	Medium, wide	HR323xx	323xx	323xx	323xx
	Very light, extra wide	HR330xx	330xx	330xx	330xx
	Light, extra wide	HR331xx	331xx	331xx	331xx
	Medium, extra wide	HR332xx	332xx	332xx	332xx
Suffix	Medium contact angle	C	B	B	B
	Steep contact angle	D	–	–	–
	Modified internal design	X	X	X	X
	Conforms to ISO 355	J	–	–	A

Symbols of Bearings

Bearing numbering is important to make sure that the bearing type and the bearing technical properties are expressed properly. Ordering a wrong part for the production environments can be detrimental, i.e. delays in a production environment due to ordering wrong bearing part number will lead to loss of time and money.

In order to prevent errors in coding of 100,000 different bearing types all around the world, bearings are systematically coded. With this coding system, every bearing has its own symbol.

Criteria for bearing symbols:

1. Bearing Type
2. Bearing Dimensions
3. Bearing Tolerances
4. Bearing Internal Clearance
5. Other technical details

Note: Ball bearing coding is based on DIN 623 standard.

Prefixes and Suffixes

If the bearing has a shield or seal, or internal clearance is larger than normal, or any other property that is not normal, then the property is denoted by either with a prefix or a suffix.

Some prefixes and suffixes used at ORS are provided below. These prefixes and suffixes may differ between different bearing suppliers.

Ball Bearings

Suffix Instructions

Cylindrical Roller Bearings

Cylindrical roller bearings are classified based on the existence of shoulders on the rings. Information about our current production is provided below.

Tapered Roller Bearings

Inch and metric types are coding systems differ from each other. In addition, the coding is also different under ISO 355.

AFBMA inch part numbering:

ISO dimensional metric numbering:

Metric numbering according to ISO 355:

Know Ball Bearings

Bearing Nomenclature

You can learn a lot about a bearing just from its part number.
A typical bearing is the 6203ZZ bearing. This part number can be divided into it's components:

6203ZZ

which means:

Type Code
Series
Bore
Suffix

The type code indicates the type of bearing. While each manufacturer uses their own numbers, there are a few numbers that could be considered standard in the industry.

1	Self-Aligning Ball Bearing This kind of ball bearing has a spherical outer race, allowing the axis of the bearing to "wander around". This is important because misalignment is one of the big causes of bearing failure.
2	Spherical Roller Bearing
3	Double-Row Angular Contact Ball Bearing Designed to take axial as well as radial loads.
4	Double-Row Ball Bearing Designed for heavy radial loads.
5	Thrust Ball Bearing Intended for exclusively axial loads.
6	Single-Row Deep Groove Ball Bearing Typical ball bearing. Handles light axial loads as well as radial loads.
7	Single-Row Angular Contact Bearing For axial (one direction only!) as well as radial loads.
8	Felt Seal To assure that the entire inside edge of the seal touches the inner ring, the inner ring is enlarged. If a bearing of more normal proportions is required, the outer ring is also enlarged, and the bearing is referred to as a "wide cup" bearing.
32	Tapered Roller Bearing This is the kind of wheel bearings used in cars. The rollers are not cylindrical, but conical. They handle large raidal and axial loads.
R	Inch (Non-Metric) Bearing	Varies
N	Cylindrical Roller Bearing Instead of balls, cylindrical rollers are used. These bearings can handle much more radial load, but can handle much less axial load, than ball bearings.
NN	Double-Row Roller Bearing Handles greater radial loads than standard cylindrical roller bearings.
NA	Needle Roller Bearing Needle bearings are basically roller bearings, but the rollers are much smaller, making the bearing more compact.	Varies

Type 6, "single-row deep groove", is perhaps the most common type of bearing.
If the bearing is an inch bearing (the first digit in the number is an R), then the size is the digit or digits immediately following the R, in 16ths of an inch. An R8-2RS bearing, for example, has an 8/16th or 1/2 inch bore.
If the first digit is a number, however, it is a metric bearing, and the second digit is the series, which reflects the robustness of the bearing. The series are, from lightest to heaviest:

8	Extra thin section
9	Very thin section
0	Extra light
1	Extra light thrust
2	Light
3	Medium
4	Heavy

Yes, they go in that order. Gotta keep things simple, you know.
Each of these series also establishes a relationship between the bore size, outer diameter, and thickness of the bearing, in accordance with ISO standards. I have no idea what they are.
The third and fourth digits indicate the bore size in millimeters. Except for 0 through 3, the bore size is simply five times the third and fourth digits together. 0 through 3, however, are different:

00	10mm
01	12mm
02	15mm
03	17mm

If there is no fourth digit - for example, a 608 bearing, a common roller skate bearing - then the size is the last digit in millimeters.
The last letters indicate something special about the bearing. For example:

Z	Single shielded
ZZ	Double shielded
RS	Single sealed
2RS	Double sealed
V	Single non-contact seal
VV	Double non-contact seal
DDU	Double contact seals
NR	Snap ring and groove
M	Brass cage

And then there are the completely off-the-wall bearing numbers, like 499502H. I have no idea what that number is supposed to mean, but it applies to what is basically an R10-2RS bearing, only a bit thicker and with a groove and snap ring.

Examples

Common Skate Bearings

Number	Bore (mm)	O.D. (mm)	Width (mm)
608	8	22	7
627	7	22	7
688	8	16	4
698	8	19	6

All these bearing numbers start with 6, which tells us they're Single-row deep groove ball bearings. The second digits tell us the robustness of the bearings. The last two, in series 8 and 9, are very thin and lightweight bearings, while the first, in series 0, is an "extra light" bearing without being abnormally thin. The third bearing, in series 2, is the most robust of all, being merely "light".

Light vs Heavy Comparison

Consider the following three bearings:

Number	Bore mm	O.D. mm	Thickness mm
6010-2RS	50	80	16
6210-2RS	50	90	20
6310-2RS	50	110	27

We can see from the part numbers that they're all 50mm single-row deep groove ball bearings. However, we can also see that they're each a different series; specifically, Extra Light, Light, and Medium. Compare the O.D. and thickness of each bearing, and you can see how the Extra Light bearing (series 0) is the smallest, and the Medium Bearing (series 3) is the largest. The larger bearing can take much more load than the smaller bearing, though how much depends on the manufacturer and the RPM the bearing is run at.

Number	Bore mm	O.D. mm	Thickness mm
6904-2RS	20	37	9
6004-2RS	20	42	12
6204-2RS	20	47	14
6304-2RS	20	52	15

These are all 20mm single-row deep groove ball bearings of different series. The first, of series 9, is a "very thin section" bearing, meaning it is much thinner than usual - it is only 25% as thick as its O.D., while the others are approximately 30% as thick as their O.D.

Common Bearing Dimensions

Extra Light Bearings

Number	Bore mm	O.D. mm	Thickness mm
6000-2RS	10	26	8
6001-2RS	12	28	8
6002-2RS	15	32	9
6003-2RS	17	35	10
6004-2RS	20	42	12
6005-2RS	25	47	12
6006-2RS	30	55	13
6007-2RS	35	62	14
6008-2RS	40	68	15
6009-2RS	45	75	16
6010-2RS	50	80	16
6011-2RS	55	90	18
6012-2RS	60	95	18
6013-2RS	65	100	18
6014-2RS	70	110	20
6015-2RS	75	115	20

Light Bearings

Number	Bore mm	O.D. mm	Thickness mm
6200-2RS	10	30	9
6201-2RS	12	32	10
6202-2RS	15	35	11
6203-2RS	17	40	12
6204-2RS	20	47	14
6205-2RS	25	52	15
6206-2RS	30	62	16
6207-2RS	35	72	17
6208-2RS	40	80	18
6209-2RS	45	85	19
6210-2RS	50	90	20
6211-2RS	55	100	21
6212-2RS	60	110	22
6213-2RS	65	120	23
6214-2RS	70	125	24
6215-2RS	75	130	25
6216-2RS	80	140	26

Medium Bearings

Number	Bore mm	O.D. mm	Thickness mm
6301-2RS	12	37	12
6302-2RS	15	42	13
6303-2RS	17	47	14
6304-2RS	20	52	15
6305-2RS	25	62	17
6306-2RS	30	72	19
6307-2RS	35	80	21
6308-2RS	40	90	23
6309-2RS	45	100	25
6310-2RS	50	110	27

Inch Bearings

Number	Bore inch	O.D. inch	Thickness inch
SR3-2RS	0.1875	0.5000	0.1960
R4-2RS	0.2500	0.6250	0.1960
R4A-2RS	0.2500	0.7500	0.2813
R6-2RS	0.3750	0.8750	0.2813
R8-2RS	0.5000	1.1250	0.3125
R10-2RS	0.6250	1.3750	0.3438
R12-2RS	0.7500	1.6250	0.4375
R14-2RS	0.8750	1.8750	0.5000
R16-2RS	1.0000	2.0000	0.5000
R20-2RS	1.2500	2.2500	0.5000
1601-2RS	0.1875	0.6875	0.3125
1602-2RS	0.2500	0.6875	0.3125
1605-2RS	0.3125	0.9063	0.3125
1603-2RS	0.3125	0.8750	0.3438
1604-2RS	0.3750	0.8750	0.3438
1614-2RS	0.3750	1.1250	0.3750
1606-2RS	0.3750	0.9063	0.3125
1615-2RS	0.4375	1.1250	0.3750
1607-2RS	0.4375	0.9063	0.3125
1620-2RS	0.4375	1.3750	0.4375
1616-2RS	0.5000	1.1250	0.3750
1621-2RS	0.5000	1.3750	0.4375
1633-2RS	0.6250	1.7500	0.5000
1623-2RS	0.6250	1.3750	0.4375
1638-2RS	0.7500	2.0000	0.5625
1630-2RS	0.7500	1.6250	0.5000
1641-2RS	1.0000	2.0000	0.5625
1652-2RS	1.1250	2.5000	0.6250
1658-2RS	1.3125	2.5625	0.6875

Other Stuff

Ever wonder how they assemble ball bearings? There are two ways.
The typical ball bearing, called a Conrad bearing. There is enough space between the balls that if they're all pushed over to one side, the inner ring can be pushed to the opposite side, into the space left by moving the balls. This increases the space on the side where the balls are, letting them be removed. The bearing cage usually keeps the balls evenly spaced so this doesn't happen by accident.

Conrad Type Bearing Assembly

The other kind of ball bearing is called a maximum capacity bearing, and has a special notch cut in the side of the rings, into which the balls are placed during assembly. As a result of this notch, the axial loads this kind of bearing can take are quite small, and must be in combination with a large radial load. However, the increased number of balls that can be fit into the bearing means the maximum capacity type bearing can handle a larger radial load.

Maximum Capacity Bearing

Design Life

The design life of a bearing depends on rated load and the equivalent radial load.

Deep Groove: L₁₀ = (C/P)ⁿ

The rated load, C, is the load at which 10% of bearings fail after one million revolutions. The manufacturer will provide this number. One million revolutions may sound like a lot, but it's not. A car engine typically has one million revolutions on it after only eight hours.
The equivalent load, P, is a combination of axial load and radial load, times some factor to account for shock loading, acceptable noise levels, lubrication quality, cleanliness, speed, temperature, etc. Calculating it can be a pain.
The exponent, n, is 3 for radial bearings, and 3.33 for thrust bearings. This large an exponent means that doubling the load on a bearing will decrease its life by a factor of eight or ten, depending on the type of bearing. Don't overload your bearings!
The formula for calculating equivalent load is

P = (XF_r + YF_a) × s

where F_r is actual radial load, F_a is actual axial load, X is the static radial factor, and Y is the static axial factor, and s is the service factor, which varies from 1 on up. If F_a is zero (no axial load) you can ignore all this folderol, and P = F_r. Likewise, if F_r is zero (no radial load), then P = F_a.
Calculating X and Y is so complicated that I avoid it when I can - by using separate thrust and radial bearings, by assuming X is 1 and Y is 3 (values which far exceed anything realistic), or by using software. SKF has an online bearing calculator here.
If you really want to try calculating X and Y, start here.

BEARING NUMBER CODE REFERENCE