Fafnir bearing

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Fafnir bearing

Fafnir bearing part number system

Fafnir bearing part number system

How to read FAFNIR ball bearing numbers:

EXAMPLE: MMW205PPE5638
Super-precision ABEC-7 tolerance Wide type plya-seal bearing Basic number Plya-seals on both sides Special feature specification.

EXAMPLE: P305KDDFS160K
Loose internal fit-up Basic bearing number Conrad type Shield on both sides Lubricant Aero-shell #11 MIL-G-3278

Part number system

Prefix Suffix Definition
. . KP20A) .
. . PROVISION FOR RELUBRICATION, EXTERNAL SELF-ALIGNING WITH ECCENTRIC LOCKING COLLAR.
. . PROVISION FOR RELUBRICATION, NOT EXTERNAL SELF -ALIGNING , WITH ECCENTRIC LOCKING COLLAR.
. -2 ANY BEARING NUMBER FOLLOWED BY A DASH AND ANOTHER SINGLE DIGIT INDICATES A BEARING DIFFERING FROM STANDARD (AS REPRESENTED BY THE BEARING NUMBER PROPER) IN ONE RESPECT OR ANOTHER.
. -3 ANY BEARING NUMBER FOLLOWED BY A DASH AND ANOTHER SINGLE DIGIT INDICATES A BEARING DIFFERING FROM STANDARD (AS REPRESENTED BY THE BEARING NUMBER PROPER) IN ONE RESPECT OR ANOTHER.
. -4 ANY BEARING NUMBER FOLLOWED BY A DASH AND ANOTHER SINGLE DIGIT INDICATES A BEARING DIFFERING FROM STANDARD (AS REPRESENTED BY THE BEARING NUMBER PROPER) IN ONE RESPECT OR ANOTHER.
. 3, ETC. UNCHANGED.
. A MEDIUM DUTY AIRCRAFT TYPE.
. A NARROW SERIES TYPE.
. A ORIGINAL MAXIMUM (FILLING SLOT TYPE) (OBSOLETE ON MOST SIZES) (SUPERSEDED BY W) .
. AK LOWER TORQUE RETAINER TYPE, AIRCRAFT SERIES (E.G. AW5AK) .
. B SPHERICAL O.D.
. BF WIDE INNER RING BEARING, BEVELED O.D., FELT SEALS.
. BR BRONZE RETAINER, STAMPED ON BOX ONLY.
. BS EXTERNAL SELF-ALIGNING AIRCRAFT TORQUE TUBE TYPE (E.G. KP25BS)
. BT SPECIAL CATERPILLAR REPLACEMENT.
. CL, 2, DENOTES LATEST INTERNAL CONSTRUCTION CHANGE, OVERALL DIMENSIONS
. CN SPECIAL BEARING, CHICAGO PNEUMATIC TOOL.
. CR STAMPED ON BOX ONLY TO DESIGNATE COMPOSITION RETAINER.
. D STEEL PLATE GREASE SHIELD ON ONE SIDE OF BEARING.
. DB DUPLEX BACK-TO-BACK.
. DD STEEL PLATE GREASE SHIELD ON BOTH SIDES OF BEARING.
. DDG DOUBLE SHIELD, SNAP RING AND GROOVE ON O.D. OF OUTER RING.
. DF DUPLEX FACE-TO-FACE.
. DG SINGLE SHIELD, SNAP RING AND GROOVE ON O.D. ON SIDE OPPOSITE SHIELD.
. DT DUPLEX TANDEM.
. DU DUPLEX UNIVERSAL FLUSH GROUND FOR MOUNTING DB, DF, OR DT.
. DUH DUPLEX UNIVERSAL, HEAVY DELOAD.
. DUL DUPLEX UNIVERSAL, LIGHT DELOAD.
. DUM DUPLEX UNIVERSAL, MEDIUM DELOAD.
. E (FOLLOWED BY FOUR DIGIT NUMERAL) CUSTOMER SPECIFICATION.
. F SYNTHETIC RUBBER AND FELT WASHER, INCORPORATED ON INTEGRAL PART OF MECHANI-SEAL ON WIDE INNER RING BEARINGS.
. FT FULL TYPE (WITHOUT A RETAINER) .
. G SNAP RING AND GROOVE ON O.D. OF OUTER RING.
. GE SUFFIX FOR FEW NARROW SERIES.
. H HEAVY AIRCRAFT SERIES.
. K LATEST CONRAD (NON-FILLING SLOT) TYPE.
. KD CONRAD TYPE, SINGLE SHIELD.
. KDD CONRAD TYPE, DOUBLE SHIELDED.
. KI ALSO AIRCRAFT HELICOPTER BEARING.
. KL INDUSTRIAL POWER TRANSMISSION BALL BEARING, WIDE INNER RING, SINGLE SEAL .
. KL CONRAD CONSTRUCTION, SINGLE MECHANI-SEAL.
. KLB INDUSTRIAL POWER TRANSMISSION BALL BEARING, WIDE INNER RING, SINGLE SEAL, EXTERNAL SELF-ALIGNING.
. KLD CONRAD CONSTRUCTION, SINGLE MECHANI-SEAL, SINGLE SHIELD.
. KLL INDUSTRIAL TRANSMISSION BEARING, WIDE INNER RING, DOUBLE SEAL.
. KLL CONRAD CONSTRUCTION, DOUBLE MECHANI-SEAL.
. KT WIDE INNER TYPE TO DENOTE CHANGE IN OUTER RING SIZE FROM ORIGINAL DESIGN.
. KT SINGLE FELT SEAL, CONRAD CONSTRUCTION.
. KTD CONRAD CONSTRUCTION, ONE FELT SEAL, ONE SHIELD.
. KTT DOUBLE FELT SEAL, CONRAD CONSTRUCTION.
. KVL CONRAD CONSTRUCTION, SINGLE MECHANI-SEAL.
. KVLD CONRAD CONSTRUCTION, SINGLE MECHANI-SEAL, SINGLE SHIELD.
. KVLL CONRAD CONSTRUCTION, DOUBLE MECHANI-SEAL.
. KVT SINGLE FELT SEAL, CONRAD CONSTRUCTION.
. KVTD CONRAD CONSTRUCTION, SINGLE FELT SEAL, SINGLE SHIELD.
. L LEFT-HANDED THREAD, ROD-END TYPE.
. L MECHANI-SEAL ON ONE SIDE OF SINGLE-ROW RADIAL AND WIDE INNER RING BEARINGS .
. LD MECHANI-SEALED ON ONE SIDE, PLATE SHIELD ON OTHER.
. LF MECHANI-SEALED ONE SIDE WITH FELT OR COMPOSITION BETWEEN SEAL MEMBERS.
. LL MECHANI-SEALS BOTH SIDES OF BEARING, RADIAL AND WIDE INNER TYPE.
. LLF MECHANI-SEALS BOTH SIDES OF BEARING WITH FELT OR COMPOSITION BETWEEN SEAL MEMBERS.
. LLG DOUBLE MECHANI-SEAL, SNAP RING AND GROOVE ON O.D. OF OUTER RING.
. M MALE SHANK, ROD-END TYPE.
. MBR MACHINED BRONZE RETAINER (STAMPED ON BOX ONLY) .
. MS STAMPING SIZE DESIGNATION, FLANGETTE UNIT.
. MSR MACHINED STEEL RETAINER (STAMPED ON BOX ONLY) .
. N ONE SHIELDED BEARINGS CLOSER FITTING GREASE SHIELD WITH MORE LAND ON BEARING FACE.
. N 6000 SERIES. OLD AMERICAN WIDTH IN INCHES. (NOTE: 6000 SERIES WITHOUT SUFFIX "N" IS EUROPEAN METRIC WIDTH) .
. N DOUBLE ROW BEARINGS, 5000 SERIES. OLD AMERICAN, NARROW WIDTH PRIOR TO SAE STANDARDS. (NOTE: 5000 SERIES WITHOUT SUFFIX "N" IS PRESENT SAE STANDARD WIDTH) .
. NP SINGLE NON-REMOVABLE PLYA-SEAL.
. NPP TWO NON-REMOVABLE PLYA-SEALS.
. P PLYA-SEAL ON ONE SIDE OF BEARING.
. PP PLYA-SEAL ON BOTH SIDES OF BEARING.
. PW EXTRA DUTY RADIAL, THRUST TYPE 7000 SERIES.
. R RIGHT-HAND THREAD ROD-END TYPE.
. S SOLID SHANK, ROD-END TYPE.
. S EXTERNAL SELF-ALIGNING TYPE, SPHERICAL SURFACE ON THE O.D. IS MATCHED WITH AN INTERNAL SPHERICAL SURFACE OF AN EXTRA RING HAVING A STRAIGHT OR FLAT O.D. USED TO DESIGNATE SINGLE- AND DOUBLE-ROW AND WIDE INNER RING BEARINGS.
. SMBR SILICON, MACHINED BRONZE RETAINER.
. SR STEEL RETAINER.
. T FELT SEAL ON ONE SIDE OF BEARING.
. TD SINGLE SEAL AND SHIELD.
. TG SINGLE FELT SEAL, SNAP RING AND GROOVE ON O.D. OF OUTER RING ON SIDE OPPOSITE SEAL.
. TT FELT SEAL ON BOTH SIDES OF BEARING.
. W (FOLLOWED BY NUMERAL) WIDTH OF INNER RING IN SIXTEENTHS, BELL CRANK TYPE.
. W 20 DEGREE ANGLE IN SMALLER SIZES, 7200 AND 7300 SERIES.
. W LATEST MAXIMUM CAPACITY (FILLING SLOT) TYPE.
. WD LOADING GROOVE CONSTRUCTION, SINGLE SHIELD FACE OPPOSITE GROOVE.
. WI MAXIMUM TYPE (W) COUNTERBORED ON OUTER RING.
. WP 7000 SERIES WITH 35 DEGREE CONTACT ANGLE, SAME NOTE AS FOR WI (SUPERSEDED BY 7000PW SERIES) .
0 . SUPER-QUIET SERIES.
2 . 12 DEGREE CONTACT ANGLE IN RADIALLY FITTED BEARINGS.
2MM . ABEC-7 PRECISION, 12 DEGREE CONTACT ANGLE.
3 . 25 DEGREE CONTACT ANGLE IN RADIALLY FITTED BEARINGS.
3MM . ABEC-7 PRECISION, 25 DEGREE CONTACT ANGLE.
A . STAINLESS STEEL.
AA . ANY STEEL OTHER THAN 52100 AND 440C STAINLESS.
B . AIRCRAFT TORQUE TUBE TYPE (E.G. B542).
BCP . BELLCRANK TYPE AIRCRAFT BEARING, PLYA-SEALS (E.G. BCP4W10) .
CO . CYLINDRICAL CARTRIDGE UNIT - (REPLACEMENT BEARING UNIT SERIES MUOB) .
D R TRACK ROLLER TYPE, AIRCRAFT BEARING (E.G. D7R6-2) .
DF . AIRCRAFT DOUBLE-ROW.
DPP . AIRCRAFT, DOUBLE-ROW, PLYA-SEAL TYPE.
DR . DOUBLE ROW INDUSTRIAL ROLLER BEARINGS.
DRN . DOUBLE RIGID PILLOW BLOCK.
DSA . STANDARD SERIES DOUBLE PILLOW BLOCK, TWO WIDE INNER RING BEARINGS WITH LOCKING COLLARS, EACH BEARING SINGLE LABYRINTH SEALED (REPLACEMENT BEARING UNIT SERIES MUA) .
DSADD . SAME AS DSA SERIES EXCEPT FURNISHED WITH DUST SEAL COLLARS.
DSAO . SAME AS DSA SERIES EXCEPT HEAVY SERIES (REPLACEMENT BEARING UNIT SERIES MUOA) .
DSAODD . SAME AS DSADD SERIES EXCEPT HEAVY SERIES (REPLACEMENT BEARING UNIT SERIES MUOA) .
DSP . DOUBLE ROW SELF-ALIGNING AIRCRAFT BEARING, PLYA-SEAL, PRE-LUBRICATED.
DSRP . AIRCRAFT SELF-ALIGNING ROLLER WITH PLYA-SEALS.
DW . AIRCRAFT, WIDE, DOUBLE-ROW.
F . FLANGED OUTER RING, MOSTLY SMALL INSTRUMENT SIZES.
FL . AIRCRAFT FAIRLEAD BEARINGS.
G . RELUBRICATABLE MECHANI-SEAL, WIDE INNER RING BEARING.
G . AIRCRAFT GUIDE ROLL.
G KLL DOUBLE MECHANI-SEAL WIDE INNER RING POWER TRANSMISSION BEARING, WITH
G KLLB DOUBLE MECHANI-SEAL WIDE INNER RING POWER TRANSMISSION BEARING, WITH
G Y PUSH PULL TYPE GUIDE BEARING (E.G. G4Y17) .
GD . AIRCRAFT GUIDE ROLL.
GN . HEAVY SERIES, RELUBRICATABLE, WIDE INNER RING, MECHANI-SEAL BEARINGS.
H . STAMPED ON BOX ONLY, DESIGNATES SNUG INTERNAL FIT-UP.
J . EXTRA LOOSE INTERNAL FIT.
KA . AIRCRAFT AERO SEAL TYPE.
KF . AIRCRAFT SINGLE ROW, ORIGINALLY FELT SEALS, NOW PLYA-SEALS, SAME DESIGNATION.
KP . AIRCRAFT SINGLE ROW PLYA-SEAL.
KP A FULL TYPE AIRCRAFT BEARING, PLYA-SEAL, PRELUBRICATED, MEDIUM DUTY (E.G.
KP AR TRACK ROLLER TYPE AIRCRAFT BEARING (E.G. KP3AR11-2) .
KP B FULL TYPE AIRCRAFT BEARING, MEDIUM DUTY, PLYA-SEAL, PRELUBRICATED (E.G. KP37B) .
KS . AIRCRAFT, SINGLE-ROW, SELF-ALIGNING.
KS L SELF-ALIGNING AIRCRAFT BEARING, METAL SHIELD, PRELUBRICATED (E.G. KS3L) .
L . INTERNAL SELF-ALIGNING TYPE.
LAK . DIRECT MOUNTED BALL BEARING PILLOW BLOCK SERIES DESIGNATION (REPLACEMENT BEARING SERIES G-KLLB) , DOUBLE MECHANI-SEAL, EXTERNAL SELF-ALIGNING BEARING.
LAO . DIRECT MOUNTED BALL BEARING PILLOW BLOCK SERIES DESIGNATION (REPLACEMENT BEARING SERIES GN-KLLB) , DOUBLE MECHANI-SEAL, EXTERNAL SELF-ALIGNING BEARING.
LC . CYLINDRICAL CARTRIDGE UNIT (REPLACEMENT BEARING SERIES G-KLLB) .
LCJ . FLANGE CARTRIDGE UNIT, (REPLACEMENT BEARING SERIES G-KLLB) .
LCJO . SAME AS LCJ EXCEPT HEAVY SERIES (REPLACEMENT BEARING SERIES (G-KLLB) .
LM . "L" MEANS DOVETAIL OR UNDERCUT CAM ON WIDE INNER BEARINGS. THE "M" MEANS CLOSER BORE TOLERANCES NOW STANDARD.
LP . SPECIAL WIDE INNER BEARING, PROCTOR AND SCHWARTZ.
LTU . TAKE-UP UNIT, (REPLACEMENT BEARING SERIES G-KLLB) .
M . ABEC-3 TOLERANCE.
M FS60000 ABEC-5 BEARING, (LAST FOUR DIGITS OF FS SUFFIX ARE FOR CUSTOMER SPECIFICATION) .
MC . MOTOR CARTRIDGE UNIT (REPLACEMENT BEARING UNIT MUOA) .
MM . SUPER-PRECISION TYPE MANUFACTURED TO MEET ABEC-7 SPECIFICATION.
MUA . REPLACEMENT BEARING UNIT FOR DSA-DSADD PILLOW BLOCKS.
MUB . REPLACEMENT BEARING UNIT FOR SA-SAD-SADD TYPE PILLOW BLOCKS.
MUOB . REPLACEMENT BEARING UNIT FOR SAO, SAOD, AND SAODD PILLOW BLOCKS.
MV . ABEC-7 MODIFIED.
N . HEAVY SERIES, NON-RELUBRICATABLE WIDE INNER RING MECHANI-SEAL BEARINGS.
N KLL INDUSTRIAL POWER TRANSMISSION BEARING, DOUBLE SEALED, WIDE INNER RING. WITH ECCENTRIC LOCKING COLLAR.
N KLLB INDUSTRIAL POWER TRANSMISSION BEARING, DOUBLE SEALED, WIDE INNER RING WITH ECCENTRIC LOCKING COLLAR, EXTERNAL SELF-ALIGNING.
NLTU . TAKE-UP UNIT FRAME, PRESSED STEEL FOR SIDE MOUNTING.
P . AIRCRAFT SPECIAL PULLEY BEARINGS.
P . STAMPED ON BOX ONLY, INDICATES LOOSE INTERNAL FIT-UP.
PSM S REPLACEMENT BEARING FOR SAL PILLOW BLOCK.
PSM TS REPLACEMENT BEARING FOR SAL PILLOW BLOCK.
R . REGULAR FIT-UP.
R . SINGLE CAGE ROLLER BEARING.
RA . EXTENDED INNER RING SERIES WITH COLLAR.
RB . DOUBLE SHIELDED RELUBRICATABLE WIDE INNER RING BEARINGS USED IN RUBBER PILLOW BLOCK.
RBG . RUBBER PILLOW BLOCK WITH PROVISION FOR RELUBRICATION.
RBGF . RUBBER FLANGE CARTRIDGE UNIT.
RBGU . SAME AS RBG EXCEPT FURNISHED WITH CORROSION-RESISTANT STEEL STRAP.
RE . AIRCRAFT ROD-END BEARING.
REB . ROD-END TYPE.
REP . PRECISION AIRCRAFT ROD-ENDS.
RS . RUBBER PILLOW BLOCK, NO PROVISION FOR RELUBRICATION.
RSC . RUBBER CYLINDRICAL CARTRIDGE UNIT.
RSU . SAME AS RS EXCEPT FURNISHED WITH CORROSION-RESISTANT STEEL STRAP.
S . KNOWN AS AEROLITE TYPE FOR AIRCRAFT SERVICE, FEW SPECIAL AIRCRAFT SIZES.
S . SMALL INCH DIMENSIONS SIZES.
S HD DUST SEAL COLLAR, SADD PILLOW BLOCK.
S K COLLAR, WIDE INNER POWER TRANSMISSION BEARING (E.G. S1113K) .
S KD DUST SEAL COLLAR, SADD SERIES PILLOW BLOCK.
S KT ECCENTRIC LOCKING COLLAR FOR WIDE INNER RING BEARING (E.G. SLL08KT).
S KTD DUST SEAL COLLAR, SADD PILLOW BLOCK.
S WD DUST SEAL COLLAR, SAOD OR SAODD PILLOW BLOCK.
SA . DIRECT MOUNTED BALL BEARING PILLOW BLOCK SERIES DESIGNATION (REPLACEMENT BEARING UNIT MUB SERIES) SINGLE LABYRINTH SEALED EXTERNAL SELF-ALIGNING BEARING.
SA KD DUST SEAL COLLAR ONLY FOR SADD PILLOW BLOCK.
SA WD DUST SEAL COLLAR, SADD SERIES PILLOW BLOCK.
SAD . PILLOW BLOCK DESIGNATION, SAME AS SA SERIES EXCEPT FURNISHED WITH DUST SEAL COLLAR.
SADD . PILLOW BLOCK DESIGNATION, SAME AS SA AND SAD EXCEPT FURNISHED WITH DUST SEAL COLLAR AND REAR DUST SEAL .
SAL . DIRECT MOUNTED BALL BEARING PILLOW BLOCK (REPLACEMENT BEARING SERIES PSM-S OR PSM-TS) , FURNISHED FIXED OR FLOATING, EXTERNAL SELF-ALIGNING BEARING.
SAN KD DUST SEAL COLLAR, SAOD OR SAODD PILLOW BLOCK.
SAN WD DUST SEAL COLLAR, SAOD OR SAODD PILLOW BLOCK.
SAO . DIRECT MOUNTED BALL BEARING PILLOW BLOCK SERIES DESIGNATION (REPLACEMENT BEARING UNIT SERIES MUOB) , SINGLE LABYRINTH SEALED EXTERNAL SELFALIGNING BEARING.
SAOD . PILLOW BLOCK DESIGNATION, SAME AS SAO EXCEPT FURNISHED WITH DUST SEAL COLLAR.
SAODD . PILLOW BLOCK DESIGNATION, SAME AS SAO AND SAOD EXCEPT FURNISHED WITH DUST SEAL COLLAR AND REAR DUST SEAL.
SAOL . SAME AS SAL SERIES EXCEPT FOR HEAVIER SECTION.
SCS . COUNTERSHAFT BOX UNIT (REPLACEMENT BEARING UNIT SERIES MUB) .
SM . POWER TRANSMISSION BEARING, SINGLE-ROW, EXTERNAL SELF-ALIGNING WITH ALIGNING RING, WIDE INNER RING WITH ECCENTRIC LOCKING COLLAR.
SM B INDUSTRIAL POWER TRANSMISSION BEARING, SINGLE-ROW, EXTERNAL SELFALIGNING, WIDE INNER RING WITH ECCENTRIC LOCKING COLLAR, SINGLE LABYRINTH SEAL .
SM K POWER TRANSMISSION BEARING, SINGLE-ROW, RADIAL, WIDE INNER RING, WITH ECCENTRIC LOCKING COLLAR.
SM KB POWER TRANSMISSION BEARING, SINGLE-ROW, EXTERNAL SELF-ALIGNING, WIDE INNER RING WITH ECCENTRIC LOCKING COLLAR.
SMN . BEARING SAME AS FOR SM EXCEPT BEARING IS 300 SERIES.
SMN . POWER TRANSMISSION BEARING, SINGLE-ROW, EXTERNAL SELF-ALIGNING WITH ALIGNING RING, WIDE INNER RING WITH ECCENTRIC LOCKING COLLAR, HEAVY SERIES (NO SUFFIX) .
SMN A REPLACEMENT BEARING FOR DSAO AND DSAODD SERIES PILLOW BLOCKS.
SMN B POWER TRANSMISSION BEARING, SINGLE ROW, EXTERNAL SELF-ALIGNING, SINGLE LABYRINTH SEAL, WIDE INNER RING WITH ECCENTRIC LOCKING COLLAR.
SMN K POWER TRANSMISSION BEARING, SINGLE-ROW, RADIAL, WIDE INNER RING WITH ECCENTRIC LOCKING COLLAR, HEAVY SERIES.
SMN KB POWER TRANSMISSION BEARING SINGLE-ROW, EXTERNAL SELF-ALIGNING, WIDE INNER RING WITH ECCENTRIC LOCKING COLLAR, HEAVY SERIES.
SMO . SIMILAR TO SMN EXCEPT LONGER INNER RING, OLD DESIGNATION.
SN H ECCENTRIC LOCKING COLLAR.
SN HD DUST SEAL COLLAR, PILLOW BLOCK.
SN K ECCENTRIC LOCKING COLLAR. FOR WIDE INNER RING POWER TRANSMISSION BEARING (E.G. SN103K).
SN KD DUST SEAL COLLAR, PILLOW BLOCK.
SN WD DUST SEAL .COLLAR.
SNW . ADAPTER SLEEVE, LOCKNUT, AND LOCKWASHER.
T . REAR DUST SEAL WHEN FOLLOWED BY SHAFT SIZE (E.G. T-13143 X 1-7/16 INCHES) .
T . STAMPED ON BOX ONLY, INDICATES TIGHT INTERNAL FIT-UP.
T D HOUSING, PILLOW BLOCK WITH DUST SEAL COLLAR.
TU . TAKE-UP UNIT FRAME, CAST IRON.
W . WIDE TYPE PLYA-SEAL BEARING.
WIR . SINGLE-ROW BEARING, INNER RING EXTENDED ON ONE SIDE TO DOUBLE-ROW WIDTH.
Y . AIRCRAFT SPECIAL HELICOPTER BEARINGS.
Y FWI (DB) AIRCRAFT BEARING, MEDIUM DUTY, RETAINER TYPE, DUPLEX (DB) , PLYA-SEAL (E.G. Y96PWIDB) .


 

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