Bower cylindrical bearings

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Bower cylindrical bearing

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bearings Bearing >Bearing Numbers > Bower cylindrical bearings


Bower cylindrical bearing

Bower cylindrical bearing part number system

Bower cylindrical bearing part number system

Explanation of Bower cylindrical bearing numbering systems I. Bower straight roller bearings consist of solid rollers, solid inner, and outer races.
II. The number denotes the size, while the letters denote the kind of races and roller assemblies.
III. The prefix letter "M" is shown on both races, therefore it is of no value in identification when used as a prefix, other than to denote that the bearing is manufactured to metric size.
IV. All letters preceding the bearing number pertain to the inner race. All letters following the number refer to the outer race and designate whether the bearing has a cage or has a full complement or rollers.

Part number system

Prefix Suffix Definition
. A (2ND POS) "A" SERIES, STANDARD OVERSIZE O.D. AND I.D., SMALL IDENTIFICATION GROOVE IN O.D.
. B (1ST POS) PLAIN CYLINDRICAL OUTER RACE, COUNTER BORE IN I.D. BOTH ENDS .
. B (2ND POS) SPECIAL FEATURES.
. B (3RD POS) SPECIAL FEATURES.
. C (1ST POS) PLAIN CYLINDRICAL OUTER RACE. COULD APPEAR IN THE 2ND POSITION IF PRECEDED BY THE LETTER "G".
. C (2ND POS) OVERSIZE I.D., SMALL IDENTIFICATION GROOVE IN O.D.
. D (1ST POS) SINGLE FLANGE CYLINDRICAL OUTER RACE. COULD APPEAR IN THE 2ND POSITION IF PRECEDED BY THE LETTER "G".
. D (2ND POS) SPECIAL WIDTH ETC.
. D (3RD POS) SPECIAL WIDTH ETC.
. E (1ST POS) DOUBLE FLANGE CYLINDRICAL OUTER RACE. COULD APPEAR IN THE 2ND POSITION IF PRECEDED BY THE LETTER "G".
. E (2ND POS) OVERSIZE I.D., SPECIAL WIDTH, ETC.
. E (3RD POS) OVERSIZE I.D., SPECIAL WIDTH, ETC.
. F (2ND POS) RIVETED STEEL CAGE, USED WITH M-B TYPE OUTER RACE.
. G (1ST POS) STANDARD SNAP RING GROOVE IN O.D.
. G (2ND POS) SNAP RING GROOVE IN CENTER OF O.D.
. G (3RD POS) SNAP RING GROOVE IN O.D. SIDE. (APPLIES TO "MAX-PAK" . )
. G (4TH POS) SNAP RING GROOVE IN O.D. SIDE. (APPLIES TO "MAX-PAK" . )
. H (2ND POS) BLIND HOLE IN O.D., OVERSIZE I.D., WIDTH, ETC.
. H (3RD POS) BLIND HOLE IN O.D.
. HH (3RD POS) BLIND HOLE IN O.D. CENTER. (APPLIES TO "MAX-PAK".)
. J (1ST POS) ONE PIECE MACHINED BRONZE CAGE.
. J (2ND POS) ONE PIECE MACHINED BRONZE CAGE.
. J (3RD POS) ONE PIECE MACHINED BRONZE CAGE.
. J (4TH POS) ONE PIECE MACHINED BRONZE CAGE.
. J (5TH POS) ONE PIECE MACHINED BRONZE CAGE.
. K (1ST POS) DOUBLE FLANGE CYLINDRICAL OUTER RACE, SPHERICAL O.D. (SELF-ALIGNING TYPE.)
. L (1ST POS) RIVETED STEEL CAGE. FLANGE GUIDED.
. L (2ND POS) RIVETED STEEL CAGE. FLANGE GUIDED.
. L (3RD POS) RIVETED STEEL CAGE. FLANGE GUIDED.
. L (4TH POS) RIVETED STEEL CAGE. FLANGE GUIDED.
. L (5TH POS) RIVETED STEEL CAGE. FLANGE GUIDED.
. M (2ND POS) FULL COMPLEMENT BEARING, NO CAGE.
. M (3RD POS) FULL COMPLEMENT BEARING, NO CAGE.
. M (4TH POS) FULL COMPLEMENT BEARING, NO CAGE.
. N (2ND POS) OUTER RACE PLATE, USED WITH M-S TYPE OUTER RACE.
. N (3RD POS) OUTER RACE PLATE, USED WITH M-S TYPE OUTER RACE.
. N (4TH POS) OUTER RACE PLATE, USED WITH M-S TYPE OUTER RACE.
. O (2ND POS) OVERSIZE O.D. AND I.D., IDENTIFICATION GROOVE IN O.D.
. P (1ST POS) PLAIN CYLINDRICAL OUTER RACE, SPHERICAL I.D. .(SELF?aALIGNING TYPE.)
. R (2ND POS) ALIGNING RING FOR "K" OR "P" TYPE OUTER RACE. OR SPECIAL O.D. RADIUS.
. R (4TH POS) SNAP RING ASSEMBLED WITH PART.
. R (5TH POS) SNAP RING ASSEMBLED WITH PART.
. S (1ST POS) SHORT SINGLE FLANGE CYLINDRICAL OUTER RACE.
. S (3RD POS) SPECIAL FEATURES.
. T (1ST POS) PLAIN CYLINDRICAL OUTER RACE, TWO SNAP RINGS IN I.D. FOR ROLLER RETAINMENT.
. T (2ND POS) CLOSE TOLERANCE ON DIMENSION, "FROM END OF ROLLER TO FACE OF INNER RACE."
. T (3RD POS) CLOSE TOLERANCE ON DIMENSION, "FROM END OF ROLLER TO FACE OF INNER RACE."
. T (4TH POS) CLOSE TOLERANCE ON DIMENSION, "FROM END OF ROLLER TO FACE OF INNER RACE."
. T (5TH POS) CLOSE TOLERANCE ON DIMENSION, "FROM END OF ROLLER TO FACE OF INNER RACE."
. U (1ST POS) SINGLE FLANGE CYLINDRICAL OUTER RACE, ONE SNAP RING IN I.D. FOR ROLLER RETAINMENT.
. V (2ND POS) ONE PIECE PRESSED STEEL CAGE.
. V (3RD POS) ONE PIECE PRESSED STEEL CAGE.
. V (4TH POS) ONE PIECE PRESSED STEEL CAGE.
. V (5TH POS) ONE PIECE PRESSED STEEL CAGE.
. W (2ND POS) SPECIAL WIDTH OUTER RACE PLATE. USED WITH M-S TYPE OUTER RACE.
. W (3RD POS) SPECIAL WIDTH OUTER RACE.
. W (4TH POS) SPECIAL WIDTH OUTER RACE.
. X (1ST POS) RIVETED STEEL CAGE. ROLL GUIDED. (APPLIES TO "MAX-PAK".)
. X (2ND POS) RIVETED STEEL CAGE. ROLL GUIDED. (APPLIES TO "MAX-PAK".)
. X (2ND POS) SPECIAL WIDTH OUTER RACE PLATE. USED WITH M-S TYPE OUTER RACE.
. X (3RD POS) RIVETED STEEL CAGE. ROLL GUIDED. (APPLIES TO "MAX-PAK".)
. X (3RD POS) SPECIAL WIDTH OUTER RACE PLATE. USED WITH M-S TYPE OUTER RACE.
. X (4TH POS) RIVETED STEEL CAGE. ROLL GUIDED. (APPLIES TO "MAX-PAK".)
. X (4TH POS) SPECIAL WIDTH OUTER RACE PLATE. USED WITH M-S TYPE OUTER RACE.
. X (5TH POS) RIVETED STEEL CAGE. ROLL GUIDED. (APPLIES TO "MAX-PAK".)
. Z (2ND POS) SPECIAL WIDTH OUTER RACE.
5 (3RD POS) . DOUBLE WIDTH INNER RACE (5000, 5200, AND 5300 SERIES).
7 (3RD POS) . STANDARD WIDTH INNER RACE (7200 AND 7300 SERIES) .
A (2ND POS) . PLAIN CYLINDRICAL INNER RACE.
B (3RD POS) . SPECIAL FEATURES, BORE, RADIUS, WIDTH ETC.
B (4TH POS) . SPECIAL FEATURES, BORE, RADIUS, WIDTH ETC.
C (3RD POS) . SPECIAL FEATURES, BORE, RADIUS, WIDTH ETC. (APPLIES TO "MAX-PAK".}
D (3RD POS) . 5 MM UNDERSIZE BORE. (APPLIES TO "MAX-PAK".)
D (3RD POS) . SPECIAL INNER RACE PLATE. USED WITH MS- OR ME-TYPE INNER RACE.
D (4TH POS) . SPECIAL INNER RACE PLATE. USED WITH MS- OR ME-TYPE INNER RACE.
E (2ND POS) . PLAIN CYLINDRICAL INNER RACE, NARROWER THAN STANDARD.
E (3RD POS) . 10 MM UNDERSIZE BORE. (APPLIES TO "MAX-PAK".)
F (3RD POS) . 15 MM UNDERSIZE BORE. (APPLIES TO "MAX-PAK".)
F (3RD POS) . SPECIAL SINGLE FLANGE CYLINDRICAL INNER RACE.
G (3RD POS) . 20 MM UNDERSIZE BORE. (APPLIES TO "MAX-PAK".)
H (3RD POS) . HOLE IN O.D. (APPLIES TO "MAX-PAK".)
J (2ND POS) . METRIC BEARING WITH INNER RACE AND OUTER RACE.REMOVED. CAGE PILOTS ON SHAFT.
J (3RD POS) . METRIC BEARING WITH INNER RACE AND OUTER RACE REMOVED. CAGE PILOTS IN HOUSING.
L (3RD POS) . SPECIAL WIDTH ONLY. (APPLIES TO "MAX-PAK".)
M (1ST POS) . METRIC BEARING WITH INNER RACE AND OUTER RACE REMOVED. CAGE PILOTS IN HOUSING.
M (1ST POS) . METRIC BEARING WITH INNER RACE AND OUTER RACE.REMOVED. CAGE PILOTS ON SHAFT.
M (1ST POS) . DENOTES METRIC SERIES.
N (4TH POS) . INNER RACE PLATE. USED WITH MS- OR ME-TYPE INNER RACE.
N (3RD POS) . INNER RACE PLATE. USED WITH MS- OR ME-TYPE INNER RACE.
O (2ND POS) . METRIC BEARING WITH INNER RACE AND OUTER RACE REMOVED. CAGE PILOTS IN HOUSING.
R (4TH POS) . BORE RADIUS ON OPPOSITE SIDE OF FLANGE.
R (1ST POS) . SPECIAL SERIES. A NON-AFBMA STANDARD.
R (2ND POS) . SINGLE FLANGE CYLINDRICAL INNER RACE.
R (3RD POS) . SPECIAL BORE RADIUS BOTH ENDS.
S (4TH POS) . 5 OR 10 MM SMALLER BORE.
S (2ND POS) . SHORT SINGLE FLANGE CYLINDRICAL INNER RACE.
S (3RD POS) . 5 OR 10 MM SMALLER BORE.
T (4TH POS) . 5 OR 10 MM SMALLER BORE.
T (1ST POS) . SPECIAL CONVEYOR WHEEL BEARING A NON-AFBMA STANDARD.
T (3RD POS) . 5 OR 10 MM SMALLER BORE.
U (2ND POS) . DOUBLE FLANGE CYLINDRICAL INNER RACE.
U (3RD POS) . SPECIAL FEATURES, SMALL BORE, ETC.
W (1ST POS) . HIGH CAPACITY BEARING - "MAX-PAK".
W (2ND POS) . HIGH CAPACITY BEARING - "MAX-PAK".
W (2ND POS) . SPECIAL CONVEYOR WHEEL BEARING A NON-AFBMA STANDARD.
W (3RD POS) . HIGH CAPACITY BEARING - "MAX-PAK".
X (2ND POS) . ROLLER ASSEMBLY. "X" BAR DESIGN. (APPLIES TO "MAX-PAK".)
X (3RD POS) . SPECIAL FEATURES.
Y (3RD POS) . SINGLE FLANGE CYLINDRICAL INNER RACE WITH RETAINING RING IN O.D. (NON-SEPARABLE TYPE)


 

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