Long Life Train Railway Carriage Bearing 127442 Super high quality railway train bearing Class C 5X9
Class C 5X9 ,Class D 5 1/2X10 , Class E 6X11
CTBU 100 x 175
CTBU 110 x 180
CTBU 130 x 210
CTBU 130 x 220
CTBU 130 x 230
CTBU 130 x 230
CTBU 130 x 240
CTBU 130 x 250
CTBU 140 x 220
Class B 4 1/4x 8 HM120848 HM120817XD
Class C 5 x 9 HM124646 HM124618XD
Class D 5 1/2 x 10 HM127446 HM127415XD
Class E 6 x 11 HM129848 HM129814XD
Class F 6 1/2” x 12”
CTBU Class K 6 1/2” x 9”
CTBU Class G 7” x 9”
CTBU Class G 7” x 12”
TBU 90 ；TBU 100 ；TBU 120 ；TBU 130 X 210；TBU 130 X 220；TBU 130 X 230；TBU 140 ；TBU 150 ；TBU 160×270 ；TBU 160×280
TBU 178 X 265
CTBU 130 X 210
CTBU 130 X 220
CTBU 130 X 230
CTBU 130 X 230
E (6 x 11) HM129848 HM129814XD bearing
Class C HM124646 HM124618XD
Cargo Train Heavy Loading Railway Bearing
1.Deep groove ball bearing
2.Cylindrical roller bearing
3.Self-aligning roller bearing
5.Tapered roller bearing
6.Thrust ball bearing
7.Spherical roller bearing
8.Thrust roller bearing
10.Pollow block bearing
11. Railway Bearing
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KMY BEARING provides tapered roller bearing units and compact tapered roller bearing units for various rail transit vehicles.
The products have been widely used in freight wagons including heacy wagons,subways and light rails.
Consist of two inner rings,
one common outer ring,
two tapered roller and
polymer cage assemblies,
a central spacer, grease fill
and two sealing systems.
Further components like lateral spacers, backing rings and end caps with their locking device can be added to the assembly as well as components based on specific customer requests.
roller bearing units were designed to replace plain bearings. These inch
size TBU designs had to match the existing relatively long journal
dimension. This design enables the integration of a seal wear ring on both
sides where the garter seals are riding.
AAR has standardized these garter seals and seal wear rings, which are
interchangeable with components from different bearing manufacturers. offers special LL seal designs for inch size TBUs that generate much lower friction.
LL seal benefits
• improved protection against contaminants
• longer grease life
• better and longer performance Polymer spacer benefits:
• fretting corrosion avoided
• lower wear rate of the inner ring side face/backing ring contact zone
• longer performance and longer maintenance intervals achievable because of longer grease life.
Grease life (and consequently TBU maintenance intervals) can be increased by providing a relubrication in service:
An amount of fresh grease is pumped into the unit and mixed with the already used grease
In this way it is possible to respect the most demanding maintenance intervals
leader in the friction management and power
transmission industries and continues to lead in advancing bearing technology through continuous innovation and development.
In addition to railroad applications, AP bearings are successfully
used in many types of industrial applications. This can be attributed to many factors including the bearing’s high load carrying capacity and its adaptability to a wide variety of applications.
advantages of HM127442(90930) Tapered Roller Train Railway Bearings
• Self-contained unit provides substantial cost savings in design
and installation. Many mounting parts are available with the
• Pregreased unit reduces installation costs.
• Preassembled bearing reduces the number of separate
parts to be applied and helps reduce the chance of incorrect
• High quality, tested and improved radial lip seals provide
exceptional protection, minimum relubrication and low
• Positive alignment of rollers is maintained in the bearing due to
its basic tapered roller construction. This distributes the load
over the entire roller length and helps to prevent rollers from
• On-apex design provides true rolling motion with less friction
and more resistance to wear.
• Case-hardened and hardened cones, cups and rollers put
hardness where it is needed at the working surfaces. The core
of these parts, being more ductile, resists the propagation of
fatigue cracks and spalls.
2 - HM120848 cones；1 - HM120817XD cup；1 - HM120848XA cone spacer (fitted for normal internal clearance)；2 - K86890 seal wear rings
；2 - K86895 seal assemblies；1 - K86874-90010 backing ring assembly consisting of: 1 - K86874 backing ring ；1 - K89716 vent fitting
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