Introduction
Spherical roller bearings have two rows of symmetrical rollers, a common sphered outer ring raceway and two inner ring raceways inclined at an angle to the bearing axis.
The centre point of the sphere in the outer ring raceway is at the bearing axis.
Bearing features
• Accommodate misalignment Spherical roller bearings are self-aligning like self-aligning ball bearings or CARB bearings.
• High load carrying capacity
Spherical roller bearings are designed to accommodate both heavy radial loads and axial loads in both directions.
• Long service life
The rollers are manufactured to such tight dimensional and geometrical tolerances that they are practically identical in a roller set The symmetrical rollers self-adjust, providing optimal load distribution along the roller length and together with the special profile prevent stress peaks at the roller ends.
• Low friction
Self-guiding rollers keep friction and frictional heat at low levels .
A floating guide ring guides unloaded rollers so that they enter the load zone in the optimal position.
• Robust
All spherical roller bearings contain strong window- or prong-type cages.
Designs and variants
Standard assortment
The assortment of spherical roller bearings is the widest available on the market.
The standard assortment includes:
• CC, CA and E design bearings
• sealed bearings
• bearings for vibratory applications
• bearings for wind energy applications
All spherical roller bearings are
MONTON bearings and all bearings are available with the option of a tapered bore Depending on the bearing series,
the tapered bore has:
• a taper 1:12 (designation suffix K)
• a taper 1:30 (designation suffix K30)
For sizes and variants not listed in the product tables, contact MONTON.
CC, CA and E design bearings
CC design bearings
• CC have two stamped window-type steel cages, an inner ring without flanges and a floating guide ring centered on
the inner ring.
• CC are indicated in the product table by the designation suffix C or CC
• CC are indicated in the product table by the designation suffix EC or ECC for larger bearings and have an
optimized internal design for increased load carrying capacity.
CA design bearings
•CA have a machined double prong-type brass cage, an inner ring with a retaining flange on both sides and a floating
guide ring centered on the inner ring .
The flanges on the inner ring are designed to keep the rollers in place when swiveling the bearing during mounting or
maintenance and are not designed to guide the rollers or accommodate any axial load.
• CA are indicated in the product table by the designation suffix CA
• CA are indicated in the product table by the designation suffix ECA for larger bearings and have an optimized internal
design for increased load carrying capacity.
E design bearings
• E have two stamped window-type steel cages, an inner ring without flanges and a floating guide ring centered on
the inner ring (d ≤ 65 mm) or on the cages (d > 65 mm) .
• E are indicated in the product table by the designation suffix E.
• E have an optimized internal design for increased load carrying capacity
Oil groove and lubrication holes
• CC and CA design bearings are available with an annular groove and three lubrication holes in the outer ring
(designation suffix W33) or three lubrication holes in the outer ring (designation suffix W20).
• E design bearings have an annular groove and three lubrication holes as standard.
This feature is not identified in the bearing designation (no designation suffix).
Sealed bearings
• have the same features and internal design as open spherical roller bearings
• are available with a cylindrical bore as standard
• are supplied grease lubricated and should not be washed
• are equipped with an annular groove and three lubrication holes in the outer ring, except for those with the
designation suffix W
• are fitted with a contact seal, on one or both sides, made of one of the following materials:
– sheet steel reinforced NBR (designation suffix CS or RS)
– sheet steel reinforced HNBR (designation suffix CS5 or RS5)
– sheet steel reinforced FKM (designation suffix CS2)
The seals are itted in a recess on the outer ring and seal against the inner ring .
On larger bearings, the seals are ixed by a retaining ring
Bearings sealed on both sides are lubricated for the life of the bearing and are virtually
maintenance-free (Grease life for sealed bearings) They are illed with one of the following greases:
• MONTON LGEP 2 grease (designation sufix VT143) as standard
• MONTON LGHB 2 grease (designation sufix GEM9) or LGWM 2 grease (designation sufix GLE) on request.
Grease life for sealed bearings
The grease life for sealed bearings is presented as L10, i e the time period at the end of which 90% of the bearings
are still reliably lubricated, and depends on the load, operating temperature and speed value It can be obtained for
bearings with standard MONTON LGEP 2 grease (designation suffix VT143) from:
• diagram 1, for light load (P ≤ 0,067 C)
• diagram 2, page 778, for normal load (P ≤ 0,125 C)
The grease life is valid under the following
operating conditions:
• horizontal shaft
• inner ring rotation
• operating temperature within the green temperature zone of the grease
• stationary machine
• low vibration levels
• load ratio Fa/Fr ≤ e (product table)
• rotational speed below the limiting speed.
For other operating conditions, the grease life can be estimated by multiplying the relubrication interval for open
bearings.Please contact with us!
Designation code:
1. Prefix:
BS2 Two row spherical roller bearing, special dimensions and/or features
ECB Air melt carburized steel, inner ring only, replaced by HA3
ZE Bearings with SensorMount feature
2. Internal design:
E Two pressed window-type hardened steel cages, an inner ring without flanges and a
floating guide ring centered on the inner ring (d ≤ 65 mm) or on the cages (d >
65 mm). Optimized internal design for increased load carrying capacity. Includes
the W33 feature.
CC Two pressed window-type steel cages, an inner ring without flanges and a floating
guide ring centered on the inner ring
CA, CAC Machined double prong-type brass cage, an inner ring with a retaining flange on both sides and a
floating guide ring centered on the inner ring
ECA, ECAC Large CA design bearings with the designation suffix ECA and ECAC have an optimized internal
design for increased load carrying capacity
3. Bore type:
– Cylindrical bore
K Bearing with 1 to 12 tapered bore
K30 Bearing with 1 to 30 tapered bore
4. Cage designs:
J Pressed steel cage, inner ring centered (usually omitted with E or CC suffixes)
JA Hardened pressed steel cage, hardened outer ring centered guide ring (for vibratory applications)
M Machined brass cage, rolling element centered (usually omitted with CA suffix)
MA Machined brass cage, outer ring guided (usually omitted with CA suffix)
M2 Heavy duty machined brass cage for vibratory equipment
F Machined steel cage, rolling element centered
FA Machined steel cage, outer ring centered
5. Seals:
-2CS Contact seal, NBR, on both sides
-2CS2 Contact seal, FKM, on both sides
-2CS5 Contact seal, HNBR, on both sides
-2RS Improved design contact seal, NBR, on both sides
-2RS2 Improved design contact seal, FKM, on both sides
-2RS5 Improved design contact seal, HNBR, on both sides
6.Clearance / tolerance:
C1 Clearance < C2
C2 Clearance < Normal
(C0)* Normal clearance
C3 Clearance > Normal
C4 Clearance > C3
C08 RBEC 5 running accuracy, inner & outer rings
C083 C08 + C3
C084 C08 + C4
6. Features:
W4 High point of eccentricity marked on inner ring or sleeve
W22 Special reduced outside diameter tolerance for outer ring
W26 Six lubrication holes in inner ring
W31 Bearing inspected to special quality requirement
W33 Three oil holes and circumferential groove in outside diameter
W33X Lubrication groove and six holes in outer ring
W502 Combination of W22 & W33
W507 Combination of W4, W31 & W33
W509 Combination of W26, W31 & W33
HA1 Case hardened outer and inner rings
HA3 Case hardened inner rings (equal to ECB)
VA405 Specification for vibrating applications
VA406 PTFE-lined bore
VA751-
VA759 Specification for high precision applications (printing, embossing, coating)
VT143 MONTON grease LGEP2 supplied in sealed spherical roller bearings
VE552(E) Outer ring with three equally-spaced threaded holes in one side face toaccommodate lifting tackle. The E indicates that three appropriate hoist rings are supplied with the bearing.
VT143 MONTON grease LGEP 2 filled to 25 – 45% in sealed spherical roller bearing
GEM9 MONTON grease LGHB 2 filled to 70 – 100% in sealed spherical roller bearing
W64 Solid Oil lubricants
