Turbocharger Bearings
Modern turbo bearing systems can be categorized into two types: hydrodynamic bearing systems and ball bearing systems.
Hydrodynamic systems use engine oil to lubricate and control shaft motion, with options for two fully floating journal bearings or a one-piece semi-floating bearing. Thrust bearings are also incorporated for axial control.
Ball bearing systems combine journal and thrust bearings for improved performance, with reduced clearances and lower power losses.
Product List
| Photo | Part Number | Bore Dia (d1) | Bore Dia (d2) | Outer Dia | Width | Inner Ring Material | Outer Ring Material | Ball Material | Cage Material | Max Speed (RPM) | Temperature Range | Application |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 |
LILYTB005 | 6 mm | 5.2 mm | 18 mm | 34.20 mm | GCr15 Steel | GCr15 Steel | Silicon Nitride(Si3N4) | Metal (Black Phosphated ) | 150000 | -60 to 500 ℃ | GT17,GT20,GT25 |
 |
LILYTB009 | 6.5 mm | 6.4 mm | 20.4 mm | 36.7 mm | GCr15 Steel | GCr15 Steel | Silicon Nitride(Si3N4) | Metal (Black Phosphated ) | 150000 | -60 to 500 ℃ | General |
 |
LILYTB001 | 8 mm | 8.8 mm | 22 mm | 53.73 mm | M50 Steel | GCr15 Steel | Silicon Nitride(Si3N4) | Metal (Black Phosphated ) | 150000 | -60 to 500 ℃ | GT25R.28R.30R.35R GT28,GT30,GT35 |
 |
LILYTB002 | 8 mm | 8.8 mm | 22 mm | 42.50 mm | M50 Steel | GCr15 Steel | Silicon Nitride(Si3N4) | Metal (Silver-Plated) | 150000 | -60 to 500 ℃ | GT25R.28R.30R.35R |
 |
LILYTB007 | 8 mm | 8.8 mm | 22 mm | 41.95 mm | M50 Steel | GCr15 Steel | Silicon Nitride(Si3N4) | Metal (Silver-Plated) | 150000 | -60 to 500 ℃ | GT25R,GT28R,GT30R,GT35R |
 |
LILYTB004 | 10 mm | 10.2 mm | 28.2 mm | 55.20 mm | M50 Steel | GCr15 Steel | Silicon Nitride(Si3N4) | Metal (Silver-Plated) | 150000 | -60 to 500 ℃ | GT/GTX37/40 GT/GTX42/45 GT37,GT40,GT42,GT45 |
 |
LILYTB008 | 10 mm | 10.8 mm | 28.2 mm | 44.55 mm | M50 Steel | GCr15 Steel | Silicon Nitride(Si3N4) | Metal (Silver-Plated) | 100000 | -60 to 500 ℃ | GTX37,GTX40,GTX42,GTX45 |
 |
LILYTB003 | 10.2 mm | 10 mm | 28.2 mm | 55.20 mm | M50 Steel | GCr15 Steel | Silicon Nitride(Si3N4) | Metal (Silver-Plated) | 150000 | -60 to 500 ℃ | GT25R.28R.30R.35R |
 |
LILYTB006 | 13 mm | 13.2 mm | 34.8 mm | 64.08 mm | M50 Steel | GCr15 Steel | Silicon Nitride(Si3N4) | Metal (Silver-Plated) | 80000 | -60 to 500 ℃ | GT42,GT45 |
 |
LILYTB016 | 16 mm | 16.8 mm | 44.09 mm | 68.15 mm | M50 Steel | GCr15 Steel | Silicon Nitride(Si3N4) | Metal (Silver-Plated) | 80000 | -60 to 500 ℃ | GTX5533R |
Product Comparison(Journal Vs Ball)
Shorter
(lubrication-dependent)
Low initial cost,high maintenance
High
(sliding friction)
Slow start-up
(high static friction)
Poor
(bushing wear)
Limited
(<=120℃)
Moderate
(vibration/noise-prone)
Longer
(anti-fatigue materials)
High initial cost,low maintenance
Low
(rolling friction)
Fast start-up
(low friction)
Excellent
(high-carbon steel/ceramic)
High
(<=300℃)
High
(precision.low noise)
Speed response when throttle is suddenly opened at 2000 rpm( 2 litre S.I engie)
According to Garret who is 1st introduce ball bearing to turbocharger,some professional drivers of Garrett ball-bearing turbocharged engines report that they feel like they are driving a big,normally aspirated engine.
The development of ball bearing turbochargers has been driven by the pursuit of drivability and better emissions.
Turbocharger Ball Bearing(TCBB)
Bearings work at high temperatures in an exhaust gas turbocharger environment
High speed of 120,000 to 200,000 rpm, or even higher
Smooth operation and small axial movement
Lean oil lubrication during engine start & stop
Applied in performance cars for rapid acceleration and deceleration
Engine oil provides cooling lubrication
Mainstream alloy steel
Special heat treatment enables the bearing to maintain good performance at high temperatures
Double angular contact ball bearings with ceramic balls
PEEK/metal cages to meet different applications
High-precision
Cage
PEEK/Steel Cage, coating available for different application, improved oil-deprived condition performance.
Si3N4 Ceramic ball
Better at wear resistant and high revolution
Special HT for bearing rings
Enables grain refinement, maintains initial accuracy capability.
PEEK/black coating/silver plating cage optional
