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
|
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