Ball Bearing - Timken

Clindrical Roller Bearing Numbering System
SUFFIX LETTERS PREFIX LETTERS
1 2 3 4 Explanation
- A - - Plain Inner Ring
- - B - Special Features
C - - - Mast and Chain Guide Bearings
- - C - Special Features
- - D D Inner Ring Bore 5mm Undersize (Max-Pak Series Only)
- - E E Inner Ring Bore 10mm Undersize (Max-Pak Series Only)
- - F Unground Rib O.D.
- - F F Inner Ring Bore 15mm Undersize (Max-Pak Series Only)
- - G G Inner Ring Bore 20mm Undersize (Max-Pak Series Only)
M - - - Standard Metric Series
- N N N Inner Ring Plate
R - - - Customer Series
- R - - One Ribbed Inner Ring
- S - - Short, One Ribbed Inner Ring
- - T T 5mm or 10mm Undersize Bore
- U - - Two Ribbed Inner Ring
W - - - Max-Pak 60000 Series
- - X - Unground Rib O.D.
Explanation 1 2 3 4 5
Oversized O.D. for Heavy Press Fit A A
in Standard Housing Bore
Special Features B B B
Plain Outer Ring C C C
One Ribbed Outer Ring D D
Two Ribbed Outer Ring E E
Unground Rib I.D. F
Fibron Cage F F F F F
Snap Ring Groove in Outer Ring O.D. G G G
Blind Dowel Hole in Outer Ring O.D. H H
Brass or Bronze Cage J J J J J
Composite Steel Cage L L L L L
Full Complement Bearing (No Cage) M M M M
Outer Ring Plate N N
Snap Ring Assembled in Outer Ring O.D. R R
Short, One Ribbed Outer Ring S
Two Retaining Rings in Outer Ring I.D. T T T
One Rib, One Retaining Ring in Outer Ring I.D. U U
One Piece Steel Cage V V V V V
Unground Rib I.D. X
"X" Bar Composite Steel Cage X X X X X
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