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No. 61, BinHe Road, LuoLong Zone, LuoYang City, P.R. of China

+86 (0379) 639 68877

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Excavator Bearing


  • QIBR Model Selection
  • QIBR Customized Bearing
  • QIBR Process Control
  • QIBR Sort and Grade
Models Dimensions
d D B
BA152-2036 15 203 26
BA222-1WSA 222 273 26
BA220-6SA 220 276 26
BA240-3ASA 240 310 33.5
SF4815VPX1 240 310 34
SF4831PX1 240 310 33.4
AC5033 250 330 37
AC5836 289 355 34
AC463240 230 320 40
HS05145 117 145 14
HS05154 126 154 14
HS05383 320 383 30
MC6034 300 340 18
180BA-2256 180 225 22
B-SF4454PX1 220 295 33
BA260-4 260 340 38
AC4629 230 290 27
BA230-7ASA 230 300 35
SF3607 180 225 15
BA180-4WSA 180 250 33
AC4531 225 315 36
AC4631 230 310 39
BA4852PX1 240 310 33
R196Z-4 196.85 241.3 17.462
AC463240 230 320 40
180N19W 180 250 33
200BA27V-2 200 270 33
210BA29V 210 295 35
AC423040-1 210 300 40
AC4630 230 300 35
BA280-2SA 280 370 40
BA300-4WSA 300 395 50
BD130-1SA 130 166 34
BN220-1 220 280 28
CR4411PX1 220 290 32
CR6016PX1 300 380 38
SF2812PX1 140 175 17.5
SF3227PX1 160 200 20
SF4004PX1 200 250 25
SF4019PX1 200 260 30

QIBR excavator bearings

Mainly includes, walking bearing, rotating bearing, needle bearing, gear box bearing, walking motor bearing, walking driving bearing, joint bearing, rotating axial bearing and other British non-standard bearing used on excavator.

Raw material

QIBR precision anti-friction bearings are usually made of chrome steel, which consist of about 1% carbon, 1.5% chromium and a small amount of manganese, silicon, and sometimes a small amount of molybdenum.

QIBR offers you a wide range of material options such as GCr15, 100Cr6, SKF 3, SUJ-2 etc. At the same time, some models of QIBR are available in stainless steel.

The rolling element can be ceramic ball (silicon nitride). Due to ceramic is kind of special material, the ceramic ball bearing has advantages of higher rotation speed, good self-lubricating property, and the rigidity is 15%-20% higher than the general bearing, and better high temperature resistance.

Bearing cage

The high-quality cage used by QIBR bearings ensure that the balls are evenly distributed in the bearing rings and can be rotated properly.

The cage has stamped steel wave type, stamped steel rivet type, nylon or phenolic plastic.

QIBR offers a wide range of advice and options depending on the operating conditions.


In order to prevent contaminants from entering the inside of the bearing, QIBR uses a metal dust cover or a rubber seal with a metal skeleton.

QIBR are able to choose two types as a combination seals according to your working conditions, or choose different kinds of seal materials, such as nitrile rubber BUNA, acrylic rubber HYCAR, fluoro rubber VITON.

Type of lubrication

Lubricating oil is the basic lubricant for ball bearings. Previously most of the lubricating oil was extracted from petroleum. Synthetic oils are now acceptable due to improved performance, such as two lipid synthetic oils, silicones and fluorocarbon synthetic oils. In general, lipid synthetic oils have better low temperature properties, lower volatility, and better temperature characteristics and viscosity compared than petroleum refined oils. Essentially all lubricants contain additives to inhibit chemical changes, prevent metal corrosion, and improve physical properties (antifoam, etc.).

The silicone and fluorocarbon synthetic oils that adopted by QIBR have lower volatility and wider temperature/viscosity characteristics.

Radial clearance

The radial clearance is the gap between the steel ball and the ring. QIBR is precisely tailored to customer's temperature conditions, interference fit, misalignment of the bearing's axis, required noise level and speed.

Service life and the rated load

The bearing life is the number of bearing rotations before the fatigue occurs on the ring or any rolling element (or the rotation time at a constant speed). However, the same set of bearings will not necessarily have the same life under the same conditions. In this case, the rated life is the number of rotations that 90% of the bearings in this group can reach or exceed before bearing weariness (or the rotation time at a constant speed). The service life of QIBR series bearings are 10%-20% longer than other bearings of the same model, through strict production process, high standard material selection, precision control.

The adopted steel balls

The steel balls in the deep groove ball bearings used by QIBR are mainly designed according to the load requirements of the bearing. The bearing ball sizes of different models are different, generally the value of rib coefficient Kd (ditch depth) range 0.35-0.40. , related to bearing diameter, such as 6000 series Kd = 0.35, 6400 series Kd = 0.40; 6200 and 6300 series, d ≤ 25mm take Kd = 0.35, d > 25mm take Kd = 0.40. Groove depth = Kd × steel ball diameter.

Bearing steel ball material comparison table
GB (China) Gcr15 GCr15SiMn
ASTM/AISI (USA) 52100 *
ГОСТ(Russia) ШX15 ШX15CГ
BS (UK) 534A99 *
JIS (Japan) SUJ2 SUJ3
NF (France) 100C6 100CrMn6
VDEh (Germany) 100Cr6 (1.3505) 1.352
Grade of rollers G3, G5, G10, G16, G20, G24, G28, G40, G60, G100, G200

QIBR excavator bearings commonly include deep groove ball bearing, angular contact ball bearing, self-aligning roller bearing, four-row cylinder roller bearing, tapered roller bearing, thrust roller bearing and so on.

Single-row tapered roller bearing

back-to-back two-row tapered roller bearing

Face-to-face two rows tapered roller bearing

Full complement cylinder roller bearing with sealing structure at single side

Strengthened cylinder roller bearing

C-shape self-alignment roller bearing

CA-shape self-aligning roller bearing

Bearing Standard
Bearing Precision Grade
GOST Grade 0 Grade 6 Grade 5 Grade 4 Grade 2
ISO P0 P6 P5 P4 P2

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