Technical Data

Selecting the right bearing for a specific application requires a review of performance requirements and material operating limitations. Certain design considerations must be met in the device and bearing to address such factors as load, speed, temperature, environment, method of lubrication and fit. Often times sacrifices must be made in one area to satisfy another to achieve optimal life.

Many factors come into play when selecting a bearing or creating a new design in which a ball bearing will be employed.
Most important are speed, load and temperature.

LOAD

Direction
Radial
Axial
Shock
Combined

SPEED

Constant Variable
Hi or Low
dN> 250,000

TEMPERATURE

Average
Max. Operating
Ambient

ENVIRONMENT

Vacuum
Gas or Air
Contaminants

SHAFT / HOUSING

Fits
Geometry
Tolerances
Mounting

BEARING DESIGN PROPERTIES THAT CAN BE MANIPULATED TO MEET CERTAIN PERFORMANCE CRITERIA ARE:

Other Properties

LOAD RATINGS

Basic Static
Basic Dynamic
Equivalent Dynamic “P”

MAXIMUM SPEED

Determined by size and design.

FITS

Shaft and Housing Fits

TOLERANCES

ABEC Class

BEARING LIFE

Basic Bearing Life
Ceramic Bearing Life

Part Number Properties

Example Part Number: CS6202XXPKWS – C | S | 6202 | XX | PK | WS

BALL MATERIAL: – C

C = Ceramic (Si3N4)
S = Stainless Steel (440C)
No symbol = Chrome Steel

RING MATERIAL – S

No symbol = Chrome steel
S = Stainless Steel (440C)
S3 = Stainless steel (SS304)
C = Ceramic (Si3N4)
CR = Ceramic (ZrO2)
N = Nylon
P = PEEK

SIZE 6202

Basic size (see bearing size list)

CLOSURE XX

Gas or Air
Contaminants

RETAINER MATERIAL – PK

PK = PEEK
PS = PPS
VP1 = Vespel SP1
VP3 = Vespel SP3
TR = Torlon
PT = PTFE
NY = Nylon
PH = Phenolic
No symbol = Metal

LUBRICATION – WS

Dry film lubrication / Coating
WS = Tungsten Disulfide
MO = Moly Disulfide
Grease
L1 = SRI, General purpose
L2 = Poly Rex EM, Electric Motor grade
L3 = Krytox, High Temperature
L4 = LVP Krytox, Vacuum
L5 = Kluber NB52, High speed

BASIC STATIC LOAD RATING

The basic static radial load rating (Cor) applies to bearings which rotate at very slow speeds, subjected to very slow oscillations, or stationary under load. It should be considered when heavy shock loading occurs to a rotating bearing. The basic static radial load rating is defined as the static radial load which corresponds to a calculated contact stress at the center of the most heavily loaded ball/raceway contact of 609000 PSI for all radial and angular contact ball bearings. For this contact stress, a total permanent deformation of rolling element and raceway occurs which is approximately 0.0001 of the rolling element diameter. Basic Static Load Rating for stainless steel is 75 80% of that for standard bearing steel.

BASIC DYNAMIC LOAD RATING

The basic dynamic load rating (Cr) of a bearing with rotating inner ring and stationary outer ring is that load of constant direction and magnitude which a sufficiently large sample group of apparently identical bearings can endure for a basic rating life of one million revolutions.

Values given for (C) in the bearing size charts are for standard chrome steel. 80% to 85% of the chrome steel values should be used for stainless steel.

EQUIVALENT DYNAMIC LOAD RATING “P”

Typically load conditions on radial ball bearings are a combination of radial and axial loads. In order to establish the equivalent radial load with definite force and direction we use the following formula:

Cor/Fa e Fa/Fr≤e X Fa/Fr≤e Y Fa/Fr>e X Fa/Fr>e Y
5 0.35 1 0 0.56 1.26
10 0.29 1 0 0.56 1.49
15 0.27 1 0 0.56 1.64
20 0.25 1 0 0.56 1.76
25 0.24 1 0 0.56 1.85
30 0.23 1 0 0.56 1.92
50 0.20 1 0 0.56 2.13
70 0.19 1 0 0.56 2.28

 

P=XFrYFa(kgf)
Fr=RADIAL LOAD(kgf)
Fa=AXIAL LOAD(kgf)
X=RADIAL LOAD FACTOR
Y=AXIAL LOAD FACTOR

For long term performance ball bearings must have some form of lubrication. Grease and oil is recommended whenever the application will allow it.

Generally grease is selected for low to medium speed applications and oil is selected for high speed applications.

Special environments such as vacuum, high and low temperatures may not allow conventional lubrication. In some applications the addition of grease or oil could contaminate a product. Many specialty lubrications are available to satisfy specific operating conditions.

For low speed low load applications or for when cleanliness and vacuum call for it a solid dry film lubricant coating such as Tungsten Disulfide or Moly Disulfide is a viable option.

Many specialty lubrications are available to satisfy specific operating conditions those listed below are our most common and are for comparison purposes only. There is no perfect lubrication and for specialty applications selection is made on a case by case basis. Data sheets should be analyzed for suitability.

MFG BRAND SPEED CAPABILITY OPERATING TEMPERATURE
CHEVRON SRI LOW TO HIGH -20 F to 305 F
EXXON POLYREX-EM LOW TO HIGH -20 F to 350 F
DUPONT KRYTOX LOW TO MED -50 F to 600 F
CASTROL BRAYCOTE 601 LOW TO HIGH -112 F to 400 F
KLUBER ISOFLEX NB52 LOW TO HIGH -58 F to 302F

 

SOLID LUBRICANTS

Solid lubricants offer excellent lubrication under extreme conditions.

When conditions exceed the limitations of wet lubricants as is found in high temperature vacuum applications, a dry solid lubricant coating can provide the boundary between rolling element and raceway reducing stress and increasing life.

These coatings are most beneficial to all steel bearings running dry where the boundary created by the coating can reduce micro-welding. For hybrid type bearings coatings can add additional life for critical applications.

Properties Tungsten Disulfide (WS2) Molybdenum Disulfide (MoS2)
Color Silver Gray Blue-Silver Gray
Appearance Crystalline Solid Crystalline Solid
Melting Point (º C) 1250º C 1185º C
Adhesion Mechanical-molecular interlock
Density 7.4 grams/cc 5.0 grams/cc
Molecular Weight 248 160
Coefficient of Friction 0.03 – inclined plane technique 0.03 – inclined plane technique
Thermal Stability in Air COF <0.1 till 1100ºF (594ºC) COF <0.1 @600ºF (316ºC) increases to 0.5 @1100ºF (594ºC)
Thermal Stability in Argon COF <0.1 till 1500ºF (815ºC) COF increases rapidly starting @800ºF (426ºC)
COF >0.1 @900ºF (482ºC)
Load Bearing Ability Same as substrate to 350,000 PSI to 250,000 PSI
Lubrication Temperature Range Ambient: from -273ºC to 650ºC Vacuum(10-14 Torr): from -188ºC to 1316ºC Ambient: from -185ºC to 350ºC Vacuum: from -185ºC to 1100ºC
Chemical Stability Inert, non-Toxic Inert, non-Toxic
Magnetism Non-Magnetic Non-Magnetic
Electrical Properties Has Semiconductor properties
Rockwell Hardness 30HRc
Coating Film Thickness 0.5 micron 0.5 micron
Corrosion Resistance Minor delay, will not inhibit Minor delay, will not inhibit

Internal clearance is the play within a ball bearing. It is the geometrical clearance between the inner ring, outer ring and ball. It is a critical factor in bearing selection that will directly impact bearing life. It is often overlooked, particularly as to how it is reduced by interference fits.

Radial clearance is the play between the ball and raceway perpendicular to the bearing axis. Axial clearance is the play parallel to the bearing axis and is typically at least 10 times greater than the radial clearance. Generally, internal radial clearance will be reduced 80% of the interference fit amount.

Too little or too much internal clearance will significantly influence factors such as heat, vibration, noise, and fatigue life.

In extreme applications that see high or low temperatures this clearance needs to be considered in the overall design to compensate for thermal expansion and contraction of housings and shafts.

SELECTING BEARING CLEARANCE (GENERAL GUIDELINES)

Operating Condition Clearance
Clearance fit on both inner and outer ring. Low to no axial loading. No preload. Low speeds. Little tolerance for play. Low temperature. C2
Low torque. Standard loads. Light preload. Slight interference fit on inner or outer ring, not both. Low to medium speeds. Average temperature. CN
Very low torque. High loads. Heavy interference fits. High temperature. Preloaded. C3,C4,C5

DEEP GROOVE BALL BEARING RADIAL INTERNAL CLEARANCE (UNITS: ΜM)

Nominal Bore Diameter
(mm)
Clearance
C2 CN
(NORMAL)
C3 C4 C5
over Incl. min max min max min max min max min max
10 18 0 9 3 18 11 25 18 33 25 45
18 24 0 10 5 20 13 28 20 36 28 48
24 30 1 11 5 20 13 28 23 41 30 53
30 40 1 11 6 20 15 33 28 46 40 64
40 50 1 11 6 23 18 36 30 51 45 73
50 65 1 15 8 28 23 43 38 61 55 90
65 80 1 15 10 30 25 51 46 71 65 105
80 100 1 18 12 36 30 58 53 84 75 120
100 120 2 20 15 41 36 66 61 97 90 140
120 140 2 23 18 48 41 81 71 114 105 160
140 160 2 23 18 53 46 91 81 130 120 180
160 180 2 25 20 61 53 102 91 147 135 200
180 200 2 30 25 71 63 117 107 163 150 230
200 225 2 35 25 85 75 140 125 195 175 265
225 250 2 40 30 95 85 160 145 225 205 300
250 280 2 45 35 105 90 170 155 245 225 340
280 315 2 55 40 115 100 190 175 270 245 370
315 355 3 60 45 125 110 210 195 300 275 410
355 400 3 70 55 145 130 240 225 340 315 460
400 450 3 80 60 170 150 270 250 380 350 510
450 500 3 90 70 190 170 300 280 420 390 570
500 560 10 100 80 210 190 330 310 470 440 630
560 630 10 110 90 230 210 360 340 520 490 690
630 710 20 130 110 260 240 400 380 570 540 760
710 800 20 140 120 290 270 450 430 630 600 840

The retainer keeps the balls equally spaced providing equal load distribution and prevents unnecessary wear of the rolling elements.

A retainer material with fillers can provide certain lubrication benefits as normal wear occurs. Numerous composite materials are available that are not listed here that can meet certain environmental and functional requirements.

Please contact us for further information.

PEEK and Vespel are generally considered vacuum compatible.

PPS offers the greatest chemical resistance and along with PEEK is FDA and USDA compliant.

PEEK and PPS offer the highest speed capability as a retainer material

Material compatibility in critical and or sensitive environments such as vacuum applications is subject to your bench testing and data sheet evaluation.

Since application environments vary greatly the following chart is simply a guideline.

RETAINER MATERIALS

Material Max Temp Speed (dN)*% Outgassing Particle Generation Cost
PEEK 480 F 650,000 Excellent Excellent Moderate
PPS 425 F 650,000 Good Excellent Moderate
VESPEL 500 F 600,000 Excellent Excellent High
TORLON 500 F 600,000 Excellent Excellent Moderate
TEFLON 550 F 30,000 Good Good Low
NYLON 250 F 250,000 Poor Good Low
PHENOLIC 300 F 600,000 Poor Poor Low

 

*d=inner bore diameter,N=RPM
%; Inner ring piloted, open configuration

 

RING AND BALL MATERIALS

CHROME STEEL

Chrome steel is one of a class of non stainless steels such as AISI 52100, En31, SUJ2, 100Cr6, 100C6, DIN 5401 which are used mostly in bearings

CERAMIC

  • Hybrid and full ceramic bearings are made using silicon nitride or zirconium oxide material.
  • Hybrid bearings are constructed of steel inner/outer rings, ceramic balls and retainers made of steel or thermoplastic.
  • Full ceramic bearings are 100% ceramic. Balls, rings and retainers.
  • The density of ceramic is 40% that of steel, the resulting reduction in weight reduces centrifugal forces imparted on the rings, reducing skidding, allowing up to 30% higher running speeds with less lubrication.
  • Silicon nitride balls have a 50 % higher modulus of elasticity (resistance to deformation) than steel, which increases rigidity and improving accuracy.
  • Ceramic balls have a smoother finish than steel, vibration and spindle deflection is reduced allowing higher speeds.
  • Ceramic has a lower coefficient of friction and is nearly twice as hard as bearing steel resulting in less wear with less lubrication. Bearing life can be increased.

Heat treated high carbon chromium bearing steel is the most common material used for rings and balls. Due to it low chromium content it exhibits poor corrosion resistance. The material does exhibit good mechanical properties up to 250F continuously. Above 250F bearing life is reduced as well as load capacity. Dimensional changes occur that require compensation in the overall bearing design and bearing fits. Applications are wide for this material. 52100 is magnetic.

440C STAINLESS STEEL

Heat treated 440C stainless steel offers fair to good corrosion resistance. It is the most common stainless steel used for rings and balls. With the addition of chromium and nickel corrosion resistance is greatly improved over 52100 steel. As oxygen reacts with the chromium a protective layer of chromium oxide is formed on the surface. This material can be passivated to improve corrosion resistance. Load capacity of 440C is about 20% less than that of 52100. With design considerations this material can handle service temperature up to 350F with fair load capacity. Beyond 350F capacity and life is reduced.

Applications may include some vacuum and clean processes or where general preventative corrosion resistance is desired. This material is magnetic.

300 SERIES STAINLESS STEEL (316 & 304)

In a semi-precision grade bearing, 300 series stainless steel can be chosen for improved corrosion resistance over 440C. These materials are not heat treated so load capacity is significantly less than HT 52100 & 440C. It can be used for both rings and balls or SS rings with ceramic balls. 300 series stainless steel offers excellent corrosion resistance to water and excellent to good resistance when exposed to certain common acids. This material can be an excellent choice for food grade applications. Other applications may include marine and vacuum processes. 300 series stainless steel is also a common material used for ribbon and crown type retainers. 300 series stainless steels are generally considered non-magnetic. As 300 series bearings are not as common as 440C, size availability and minimum order requirements apply.

PLASTICS

Numerous types of plastics can be used to produce semi-precision bearings.
Environment compatibility determines the variety. Acetal (Delrin) is the most common for the rings with balls of either acetal or stainless steel. Other Materials such as PEEK, PPS, Vespel, Nylon and many others can be used for the rings.

Lightly loaded low RPM applications requiring corrosion resistance, non-magnetic/non-metallic and or lightweight bearings may benefit from a plastic ball bearing. Sizes start at 8mm inner diameter. Minimum order requirements may apply.

CERAMIC MATERIAL PROPERTIES

Mechanical SI/Metric Si3N4 ZrO2
Density gm/cc (lb/ft3) 3.29 6
Porosity % (%) 0 0
Color black ivory
Flexural Strength MPa (lb/in2x103) 830 900
Elastic Modulus GPa (lb/in2x106) 310 200
Shear Modulus GPa (lb/in2x106)
Bulk Modulus GPa (lb/in2x106)
Poisson’s Ratio 0.27
Compressive Strength MPa (lb/in2x103)
Hardness Kg/mm2 1580 1300
Fracture Toughness KIC MPa•m1/2 6.1 13
Maximum Use Temperature
(no load)
°C (°F) 1000 1500

THERMAL

Thermal SI/Metric Si3N4 ZrO2
Thermal Conductivity W/m•°K (BTU•in/ft2•hr•°F) 30 2
Coefficient of Thermal Expansion 10–6/°C (10–6/°F) 3.3 10.3
Specific Heat J/Kg•°K (Btu/lb•°F)

ELECTRICAL

Electrical SI/Metric Si3N4 ZrO2
Dielectric Strength ac-kv/mm (volts/mil)
Dielectric Constant
Dissipation Factor
Loss Tangent
Volume Resistivity ohm•cm >1010

CERAMIC VS. STEEL VS. STAINLESS STEEL

Item Ceramic, Si3N4 52100 Steel 440C
Density .114 lb/in³ 0.282lb/in³ 0.275lb/in³
Service Temp 1300 F 300 F 350 F
CTE 1.56µin/in-°F 6.94µin/in-°F 5.67µin/in-°F
Hardness ~ 76 RC 62 RC 58 RC
Magnetism No Yes YES
Conductivity Non-conductive Conductive Conductive
Corrosion Resistance Excellent Poor Fair

 

CORROSION RESISTANCE COMPARISON CHART

WATER

MATERIALS 316/304 Stainless Steel 440C Stainless Steel 52100 Chrome Steel
Stream A B NC
Domestic Water A B D
Sea Water A NC D

FOOD

MATERIALS 316/304 Stainless Steel 440C Stainless Steel 52100 Chrome Steel
Food Products A B NC
Fruit & Veg. Juices A B NC
Dairy Products A C NC

DILUTE ACIDS

MATERIALS 316/304 Stainless Steel 440C Stainless Steel 52100 Chrome Steel
HCL NC NC
H2SO4 B NC NC
HNO2 A A NC
Phosphoric B NC NC

ACIDS

MATERIALS 316/304 Stainless Steel 440C Stainless Steel 52100 Chrome Steel
H2SO4 A NC NC
HNO2 NC NC NC
Phosphoric A NC NC

 

MATERIALS 316/304 Stainless Steel 440C Stainless Steel 52100 Chrome Steel
Industrial Atmospheres B B C
Salt Air A C C
Ammonia A C B
Alkaline Salts B B C

A = excellent, B = good, C = fair, D = poor, NC = Not compatible

 

CHEMICAL COMPOSITION OF BEARING STEELS

Chrome Steel

Spec C% Si% Mn% P% S% Cr% Mo% Ni N Hard-ness
SAE52100 SUJ2 0.95-1.10 0.15-0.35 0.50max 0.025max 0.025max 1.30-1.60 60-64 HRC

Stainless Steel

Spec C% Si% Mn% P% S% Cr% Mo% Ni N Hard-ness
AISI440C SUS440C 0.95-1.20 1.00 max 1.00 max 0.04 max 0.03 max 16.0-18.0 0.75 max 58-62 HRC
AISI303 SUS303 0.15 max 1.0 max 2.00 max 0.2 max 0.15 min 18.0 – 20.0 0.6 max 9.0 0.1 max 83 HRB

To help retain bearing lubrication and prevent contamination from the environment a seal (contact) or shield (non-contact) can be employed.

Often no seal (Open) is required when the bearing will be housed and externally lubricated or when operated in a vacuum.

TYPES

‘Z’ Type Shield – The ‘Z’ type shield is a metal shield that typically is non-removable after installation as is it pressed in. There is a small gap about .005 inches between the shield and inner race. There is no contact so obtainable speeds and torque are not effected as in a contact type seal. Lubricant leakage can occur and contamination can enter through this gap. They have fair dust resistance and poor water resistance. Shields are good to around 350 F.

 

‘RS’ Type Seal – The ‘RS’ type seal is a rubber seal that makes contact with the inner race. Most commonly made of Buna-rubber. They are removable. They offer the best sealing against contamination and lubricant leakage. Generally the speed rating is reduced about 35% that of the ‘Z’ type or open and torque is increased.  Temperature range is 15 F to 220 F.

 

‘V’ Type Seal – The ‘V” type seal is a non-contact type rubber seal that does not contact the inner  race, but rides in groove machined in the inner races creating a labyrinth effect. Its performance falls between a metal shield and contact type rubber seal.  Most commonly made of Buna-rubber. They are removable. They offer the good sealing against contamination and lubricant leakage. Generally the speed rating is not reduced and is comparable to that of the ‘Z’ type or open. There is no seal induced torque increase. Temperature range is 15 F to 220 F.

 

‘T’ Type Seal – The ‘T’ type seal is made of glass reinforced Teflon. This type of seal is removable and easily replaced. In most configurations the seal is held in place by a snap ring. The level of contact (sealing) can be adjusted to meet application requirements all the way from non-contact to heavy contact. Their best characteristic would be their high temperature capability of 500 F.

TYPE/MATERIAL TEMP SPEED CAPABILTY TORQUE AVAILABILITY
METAL SHIELD 350 F GOOD LOW COMMON
RUBBER (CONTACT) 220 F LIMITED HIGH COMMON
RUBBER (NONCONTACT) 220 F GOOD LOW COMMON
TEFLON 500 F GOOD MED COMMON
VITON 500 F GOOD MED LIMITED

 

The ideal mounting for a precision bearing is line to line on both shaft and housing. Such a fit has no interference or looseness. For random fitting the fit tolerances may need to be increased to meet the lot variances. For selective fitting the bearing inner and outer diameter should be accurately measured, then the shaft and housing machined to suit.

Interference fits should be used with care as they can distort the raceway and reduce radial internal clearance. In preloaded pairs, reducing the internal radial clearance increases the preload. If excessive, the results can be significantly reduced speed capability and higher operating temperatures which will ultimately reduce life.

Some applications require interference fits such as:

  • Heavy radial loading
  • Intense vibration
  • Lack of axial clamping

Radial internal clearance is reduced by approximately 80% of the interference fit.

Interference fits are usually applied to the rotating ring.

Loose fits may be suggested when:

  • Axial clamping is possible, such a snap rings, locking collars or adhesive
  • Ease of assembly
  • Axial movement is required for spring preload or thermal movements

Fits are often overlooked and is arguably the most common bearing handling mistake.
The table below is simply a guideline as there are many influencing factors to be considered such as.

  • Load, speeds and temperatures
  • Ease of assembly and disassembly
  • Rigidity and accuracy requirements
  • Machining tolerances

Therefore the appropriate fit may fall somewhere in between.

ROTATING RING INNER RING OUTER RING
APPLICATION DESIRED FIT TYPE FIT(inches) USE SHAFT DIAMETER USE HOUSING DIAMETER
Low speed, or spring preload. Loose .0001L to .0005L d – .0003
d – .0005
D .0001
D .0003
Medium speed Line to Line .0002L to .0002T d – .0000
d – .0002
D – .0000
D – .0002
High speed Light press .0000 to .0004T d .0002
d – .0000
D – .0002
D – .0004
High speed, high load Tight press .0002T to .0006T d – .0002
d – .0004
D – .0004
D – .0006

 

STATIONARY RING INNER RING OUTER RING
Most applications Line to line
to loose
.0000 to .0004L d – .0002
d – .0004
D – .0000
D .0002

L = Loose fit, T = Tight fit, d = Bearing I.D., D = Bearing O.D.

INNER RING TOLERANCE

ABEC 1 / ABEC 3
VALUES ARE IN .0001″

BORE DIAMETER BORE TOLERANCE 0 RADIAL RUNOUT WIDTH TOLERANCES 0
MM INCH ABEC 3 ABEC 1 ABEC 3 ABEC 1 ABEC 3 ABEC 1
OVER INCL. OVER INCL.
0.6 2.5 .0236 .0984 -3 -3 2 4 -16 -16
2.5 10 .0984 .3937 -3 -3 2.5 4 -47 -47
10 18 0.3937 0.7087 -3 -3 3 4 -47 -47
18 30 0.7087 1.1811 -3 -4 3 5 -47 -47
30 50 1.1811 1.9685 -4 -4.5 4 6 -47 -47
50 80 1.9685 3.1496 -4.5 -6 4 8 -59 -59
80 120 3.1496 4.7244 -6 -8 5 10 -79 -79

INNER RING TOLERANCE

ABEC 5 / ABEC 7
VALUES ARE IN .0001″

BORE DIAMETER BORE TOLERANCE 0 RADIAL RUNOUT (MAX.) WIDTH VARIATION (MAX.) REFERENCE RUNOUT WITH BORE (MAX.)
MM
OVER
MM
INCL.
INCH
OVER
INCH
INCL.
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
ABEC
7P
ABEC
5P
0 10 0 0.3937 -1.5 -2 1 1.5 1 2 1 3
10 18 0.3937 0.7087 -1.5 -2 1 1.5 1 2 1 3
18 30 0.7087 1.1811 -1.5 -2 1.5 1.5 1 2 1.5 3
30 50 1.1811 1.9685 -2 -2 1.5 2 1 2 1.5 3
50 80 1.9865 3.1496 -2 -3 1.5 2 1.5 2 2 3
80 120 3.1496 4.7244 -2.5 -3 2 2.5 1.5 3 2 3

OUTER RING TOLERANCE

ABEC 1 / ABEC 3
VALUES ARE IN .0001″

OUTER DIAMETER OUTER DIAMETER TOLERANCE LIMIT 0 RADIAL RUNOUT WIDTH TOLERANCES 0 FLANGE WIDTH TOLERANCE LIMITS 0 FLANGE DIAMETER TOLERANCE LIMITS 50
MM INCH ABEC 3 ABEC 1 ABEC 3 ABEC 1 ABEC 3 ABEC 1 ABEC 3 ABEC 1 ABEC 3 ABEC 1
OVER INCL. OVER INCL.
0 18 0 0.7087 -3 -3 3 6 -47 -47 0 -47(2) 106(1) -17(1)
18 30 0.7087 1.1811 -3 -3.5 4 6 -47 -47 0 -47 130 -20
30 50 1.1811 1.9685 -3.5 -4.5 4 8 -47 -47 0 -47 154 -24
50 80 1.9685 3.1496 -4.5 -5 5 10 -47 -47 0 -47 181 -29
80 120 3.1496 4.7244 -5 -6 7 14 -59 -59 0 -47 213 -34
120 150 4.7244 5.9055 -6 -7 8 16 -79 -79

 

OUTER RING TOLERANCE

ABEC 5 / ABEC 7
VALUES ARE IN .0001″

OUTER DIAMETER OUTER DIAMETER TOLERANCE 0 RADIAL RUNOUT (MAX.) WIDTH VARIATION (MAX.) OUTSIDE CYLINDRICAL SURFACE RUNOUT WITH REFERENCE SIDE (MAX.)
MM OVER MM INCL. INCH OVER INCH INCL. ABEC 7P ABEC 5P ABEC 7P ABEC 5P ABEC 7P ABEC 5P ABEC 7P ABEC 5P
0 18 0 0.7087 -2 -2 1.5 2 1 2 1.5 3
18 30 0.7087 1.1811 -2 -2 1.5 2 1 2 1.5 3
30 50 1.1811 1.9685 -2 -2 2 2 1 2 1.5 3
50 80 1.9685 3.1496 -2 -3 2 3 1 2 1.5 3
80 120 3.1496 4.7244 -3 -3 2 4 2 3 2 3
120 150 4.7244 5.9055 -4 -4 3 4 3 3 2 4