Special Bearings

Special Bearings are bearings that are provided for special projects

Special Bearings are bearings that are provided for special projects. Special Bearings are intended for purposes that require bearings of different sizes to bearings in general, usually applied to large sized machines, for example tunnel boring machines, bucket-wheel excavators and dump trucks in the mining industry.

The bearings that we provide in this special bearing are from well-known brands of course with very good quality, namely the RKB Bearing brand .

RKB

RKB

In short, RKB is a Swiss company with more than 80 years of experience in bearing manufacture and design, especially in medium and large size bearings , as well as bearing technology . RKB has one of the largest holdings in Europe worth more than 80 million euros. By having customers from various industries such as the cement, mining and marble industries. We provide large size bearings and bearing technology that can be used in special projects. RKB has bearing products that can support areas such as:

  • Civil Engineering Applications
  • Marine and Offshore
  • Metals
  • Mines and Minerals
  • Power Transmission
  • Heavy Automotive
  • etc

 

CIVIL ENGINEERING APPLICATIONS

 

DISC CUTTER FOR TUNNEL BORING MACHINE
SPECIAL BEARINGS

MAIN RKB BEARINGS:
T3 SEGMENT - SINGLE ROW TAPERED ROLLER BEARINGS

• Thin section large size single row tapered roller bearings (design and execution for heavy load applications)
• Up to 458 mm inner diameter
• B 10 life > 100000 h as per mining specifications

 

 

PULP AND PAPER, CONVERTING AND PRINTING
special bearings

MAIN RKB BEARINGS: T3 SEGMENT - SPHERICAL ROLLER BEARINGS

• Premium class bearings for extended service life
• Spherical, tapered and cylindrical roller bearings

 

And many more..

MARINE AND OFFSHORE

 

MAIN SHAFT OF NAVY FRIGATE

special bearings

MAIN RKB BEARINGS:
T3 SEGMENT - SPHERICAL ROLLER BEARINGS

• Large size application-optimized spherical roller bearings
• Up to 340 mm inner diameter
• Safety factor (S 0 ) according to military offshore equipment guidelines

 

 

JACKING SYSTEM IN OFFSHORE PLATFORM

special bearings

MAIN RKB BEARINGS:
T3 SEGMENT - SPHERICAL ROLLER BEARINGS

• Spherical roller bearings for rack and pinion jacking system of NG and CJ series drilling rigs working in harsh
environmental conditions
• Up to 240 mm inner diameter
• Design and execution to withstand heavy loads and variable speeds (0.3-1.2 m/ min)
• Safety factor (S 0 ) as per marine specifications
• Design life (L 10 ) ≈ 10 years service

 

And many more..

METALS

 

GUIDE ROLLS OF CONTINUOUS SLAB CASTING MACHINE

 

 

MAIN RKB BEARINGS:
T3 SEGMENT - SINGLE ROW TAPERED ROLLER BEARINGS

• Low cross section spherical roller bearings for guide rolls of continuous slab casting in hot strip mills
• Up to 170 mm outer diameter
• Out of standard window-type cage
• Stabilizing Treatment for operating temperatures up to 300 °C (S3)

 

 

WORK ROLLS OF HOT ROLLING MILL STAND

 

MAIN RKB BEARINGS:
T3 SEGMENT - SEALED FOUR-ROW TAPERED ROLLER BEARINGS

• Long life series bearings
• Phosphate Treatment for rings, rollers and spacers (PT4)
• Increase of rolling efficiency by stable operation
• Easier handling of seals

 

And many more..

MINES AND MINERALS

 

BUCKET WHEEL EXCAVATOR MAIN SHAFT

 

 

MAIN BEARINGS:
T3 SEGMENT - SPLIT DOUBLE ROW CYLINDRICAL ROLLER BEARINGS

• Time saving in hard-to-reach positions
• Manufacturing technology and expertise for maximum reliability
• Engineered for modified ISO life (L 10mh ) > 20000 h
• Up to 780 mm outer diameter
• Safety factor (S 0 ) > 3

 

 

CONE TYPE CRUSHER

 

MAIN RKB BEARINGS:
T3 SEGMENT - TECHNOLOGICAL BEARINGS

• Technological double row cylindrical roller and thrust roller bearings
• Superior load capacities
• Optimized design of inner executions for improved lubrication and resistance to high vibrations/shocks

 

And many more..

POWER TRANSMISSION

 

WIND MULTIPLICATOR

 

MAIN RKB BEARINGS:
T3 SEGMENT - TECHNOLOGICAL BEARINGS

• Technological bearings for speed multiplicators used in medium and high power wind turbines (over 850 kW)
• Maximum reliability required due to the application conditions
• Bearing optimization through RKB R&D activity

 

 

CONCRETE MIXER GEARBOX

 

MAIN RKB BEARINGS:
T3 SEGMENT - SPHERICAL ROLLER BEARINGS WOR DESIGN

• Bearing internal geometry optimized through Finite Element Analysis to sustain additional loads and friction
at low operating speeds (max 20 rpm)
• Increased permissible misalignment up to ±6° (Wider Outer Ring) in transit mixer concrete gearbox
• Premium steel class for higher reliability and extended service life
• Special heat treatments to reduce incidence of cracking
• Safety factor (S 0 ) > 2.5
• Design life (L 10m ) > 2.6 million revolutions ≈ 10 years service

 

And many more..

HEAVY AUTOMOTIVES

 

FRONT AND REAR AXLES OF DUMP TRUCK

 

MAIN RKB BEARINGS:
T3 SEGMENT - SINGLE ROW TAPERED ROLLER BEARINGS

• Single row tapered roller bearings for dumper transmission (wheel hubs of front and rear axles)
• Up to 300 mm inner diameter and 422 mm outer diameter
• E-Type design and execution for high load capacity, higher accuracy and shock resistance
• Life rating (L 10 ) > 100000 km of the vehicle

 

 

GEARBOX FOR CITY BUS ON TIRES

 

MAIN RKB BEARINGS:
T3 SEGMENT - TECHNOLOGICAL BEARINGS

• Application optimized tapered and cylindrical roller bearings
• Up to 280 mm inner diameter
• Required operating life (L 10m ) > 1.8 million kilometers of the vehicle