NTN - Large Bearings

Cylindrical Roller Bearings
Table 3 Models and characters of four row cylindrical roller bearings
Drawing
Refer to the drawings.
Drawing numbers are
listed in the dimensions table.
Characteristics
¡The bearing is mainly used for the roll neck of a rolling mill, and is designed so as to handle the maximum rating load
for the allowable space in the roll neck part. Carbonized steel may be used to provide better resistance to cracking or
impact to the inner ring.
¡Consult NTN Engineering about the fitting and bearing internal clearance when the bearing is used for the preparing
roll of a rolling mill.
¡NTN provides bearings with special configurations: with tapered shaft holes; for high speed use; designed to prevent
creeping; and, with dust and waterproof seals.
A B C
E F G
D
Remarks
Drawings from A to E show the long cylindrical rollers and
the machined cage. Drawings from F to G show the hollow
rollers and the pin type cage.
Suffix to the drawing number
M: Bearings which outer ring lubrication port is equipped
with a fitting nozzle for oil mist.
R: Inner ring has a helical groove on its inner surface.
S: Special specifications.
Note 1) The bearing has lubricant grooves on both sides of the inner rings.
2) The bearing has lubricant grooves on one of the inner rings.
3) The bearing has lubricant grooves on one of the outer rings.
4) No lubricant groove and hole is designed on the outer ring spacer.
Drawings
Table 4 Model and Characteristics of the Model SL cylindrical roller bearings
Model
Characteristics
Open type
Model SL01
Model SL02
¡Fixed end is Model SL01, free end is Model SL02.
¡Since the outer ring is split in the circumference direction using a special method and fixed as a unit
after mounting rollers, the bearing side face should be securely fixed using the shaft or
housing shoulder in the axial direction.
¡Outer ring has an oil groove and port.
¡Model SL01 can support axial loads from both directions via rollers.
¡Shoulder dimensions of shaft and bearings generally applies Da and da dimensions in the dimensions
table, but J and K dimensions are used when the moment or large axial loads are applied.
Enclosed type
Model SL04
¡Model SL04 only with the fixed side.
¡Since the inner ring is split in the circumference direction using a special method and fixed as a unit
after mounting rollers, the bearing side face should be securely fixed by using the shaft or housing
shoulder in the axial direction.
¡Inner ring has an oil groove and port.
¡Model SL04 can support radial and axial loads in either directions.
¡A sealed bearing prelubricated with grease, the outer ring is fitted with a locating snap ring, making it
easy to handle and appropriate for sheaves and other applications.
¡Surface coating is added for rust prevention.
Note: We also provide 3-row, 4-row and 5-row bearings for the Model SL cylindrical roller bearing. Consult NTN Engineering for further details.
B-38