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Dalian Running Engineering Co., Ltd.

Slewing Ring, Slewing Bearing, Excavator Slewing Ring manufacturer / supplier in China, offering High Precise Preload Cross Roller Bearings, Light Weight Series Thin Section Slewing Ring Bearings, Heavy Load Single/Double Row Ball Trailer Turntable and so on.

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High Precise Preload Cross Roller Bearings

FOB Price: US $300-9,999 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $300-9,999/ Piece
Get Latest Price
Port: Shanghai, China
Production Capacity: 1000PCS/Month
Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram

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Basic Info
  • Model NO.: XSA, XSI, XSU
  • Warranty: 12 Months
  • Rolling Element: Roller
  • Quench & Temper Hardness: 229hb-269hb
  • Normalizing Hardness: 187hb-241hb
  • Type: Cross Roller
  • Transport Package: Wooden Case
  • Origin: China
  • Material: Steel 45#, 50mn, 42CrMo
  • Gear Options: Ungeared, External Gear and Internal Gear Type
  • Seals: NBR
  • Raceway Hardness After Quenching: 55HRC-62HRC
  • Model: as Requested
  • Trademark: DRE
  • Specification: as your request
  • HS Code: 848340900
Product Description


Preload Cross Roller Bearings

Preload cross roller bearings are units comprising inner and outer rings with a closing plug and securing dowel, rolling elements, spacers, contact seals and lubrication nipples.
--gear teeth on the outer ring, inner ring or without gear teeth.
--bearing rings with through holes or threaded holes for fixing screws.
Preload cross roller bearings can support high radial loads, moderate axial loads and tilting moment loads, can support higher dynamic loads than four point contact bearings
Preload cross roller bearings are used where zero operating clearance or preload is required, used in the rotational resistance must be particularly uniform, used in where there are high requirement for accuracy and rigidity of the bearing arrangement.

High Precise Preload Cross Roller Bearings


Preload Cross Roller Bearings with External Gear Teeth
DimensionsFixing holesGear teethTooth forceBasic load ratingsInternal clearance 


daLana3)Lini3)d0mzFz normFz maxaxialradial
XSA 14 0414 N32503.3344417413-0.5455203682449559915.923.62295201462500.01 incl. 0.03
XSA 14 0544 N44640.3474547543-0.55852849832630610521.331.52706801703300.01 incl. 0.03
XSA 14 0644 N52742.3574647643-0.66853259836732612221.331.52908001853950.01 incl. 0.04
XSA 14 0744 N59838.1674747743-0.67853669840828613821.331.53159302004550.01 incl. 0.04
XSA 14 0844 N71950.1774847843-0.68853679840936811728.34234010502155100.01 incl. 0.04
XSA 14 0944 N771046.1874947943-0.798540898441032812928.34236011702275800.01 incl. 0.05
XSA 14 1094 N911198.1102410971093-0.711354410478481184814828.34239013602466700.01 incl. 0.05

Preload Cross Roller Bearings with Internal Gear Teeth

DimensionsFixing holesGear teethTooth forceBasic load ratingsInternal clearance 


Lana3)Lini3)d0mzFz normFz maxaxialradial
XSL 14 0414 N31484325415+0.5411460243752433556717.726.22295201462500.01 incl. 0.03
XSL 14 0544 N43614444545+0.5541590325053245667623.7352706801703300.01 incl. 0.03
XSL 14 0644 N50714546645+0.6641690366053655869323.7352908001853950.01 incl. 0.04
XSL 14 0744 N58814648745+0.67417904070540660611023.7353159302004550.01 incl. 0.04
 XSL 14 0844 N69914736845+0.6841890408054075289431.446.734010502155100.01 incl. 0.04
 XSL 14 0944 N761014840945+0.79419904490544856810731.446.736011702275800.01 incl. 0.05
 XSL 14 1094 N9111649841095+0.710911140481055481000812531.446.739013602466700.01 incl. 0.05

Preload Cross Roller Bearings without Gear Teeth
DimensionsFixing holesBasic load ratingsInternal clearance 


XSU 14 0414 N28484344415+0.5413-0.546024368242295201462500.01 incl. 0.03
XSU 14 0544 N38614474545+0.5543-0.559032498322706801703300.01 incl. 0.03
XSU 14 0644 N44714574645+0.6643-0.669036598362908001853950.01 incl. 0.04
XSU 14 0744 N52814674745+0.6743-0.679040698403159302004550.01 incl. 0.04
 XSU 14 0844 N60914774845+0.6843-0.6890407984034010502155100.01 incl. 0.04
 XSU 14 0944 N671014874945+0.7943-0.7990448984436011702275800.01 incl. 0.05
 XSU 14 1094 N77116410241095+0.71093-0.711404810484839013602466700.01 incl. 0.05

Slewing Bearing Definition

Slewing bearing is a large bearing with special configuration, which can endure biggest multiply load, such as axial&radial load, overturning moment,etc.

Slewing Ring Structure

Slewing ring is composed of outer ring (teeth or non-teeth),rolling element(steel ball, cylindrical roller, tapered roller), cage, inner ring(teeth or non-teeth) and seals (the one with sealed structure).

Slewing Bearing Function

Slewing bearing itself is featured in compact structure, convenient lead to slew, easy for installation&maintenance, which is widely used as slewing set in the fields of heavy machine, slewing platform in the steelworks, excavator grab, material taking&stacking set, material traveler, harbor machine, missile lauching cage,CT set, etc.

Materials for Slewing Bearing

1)Rings: Steel 45#,50Mn(carbon structural steel), 42CrMo (alloy structural steel). 50Mn and 42CrMo are usually used.

2)Rolling element: It is made of chrome steel GCr15 or GCr15SiMn.

3)Seal: It is usually made of NBR,iron,felt,or other thing which meet the capability.

Hardness: Normalizing hardness of the rings is 187HB-241HB, quench & temper hardness is 229HB-269HB, hardness of the raceway after quenching is 55HRC-62HRC.

Slewing Bearing Transportation 

Delivery:   Stock product in 7 days
                  Standard product in 30 days
                  Custom product in 40-60 days
Package: Three layers in wood cases.
Transportation types: By sea, By air, By currier

Normally we have structure for slewing bearings as below:

Single-row four point contact ball slewing bearings

Single Row Cross Roller Slewing Ring Bearings 

Double-row ball slewing bearings 

Three-row Roller Slewing Ring Bearings

High Precise Preload Cross Roller Bearings

Accept custom making according to drawing or requirment.

Slewing Bearings Main Applications

Please click the below application name you need for further detail information.

Slewing Bearings for Excavator

DRE supplies the slewing rings to a wide range of the excavators, a good replacement of excavator slewing ring bearings used on Komatsu, Hitachi, Kobelco, Caterpillar, Hyundai and so on, we can supply according to the most of the machine number, and a lot of slewing rings are in stock for the quick delivery.

1  PC60-6(Z=76)13  PC200-225  PC200-7(Z=92)1  EX60-113  EX200-3
2  PC60-6(Z=80)14  PC200-326  PC220-72  EX60-214  EX200-5
3  PC60-7(Z=76)15  PC200-527  PC300-23  EX60-315  EX210-5
4  PC60-7(Z=80)16  PC220-328  PC300-34  EX60-516  ZX120
5  PC90-617  PC220-529  PC300-55  EX9017  ZX200
6  PC100-518  PC22830  PC300-66  EX100-118  ZX225
7  PC120-519  PC200-6(S6D95)31  PC300-77  EX120-119  ZX230
8  PC120-6(4D95)20  PC200-6(S6D102)(1)32  PC400-38  EX120-220  ZX240
9  PC120-6(4D102)21  PC200-6(S6D102)(2)33  PC400-59  EX120-321  EX300-1
10  PC150-522  PC220-6(S6D95)34  PC400-610  EX120-522  EX300-2
11  PC20HT23  PC220-6(S6D102)35  PC45011  EX200-123  EX300-3
12  PC200-124  PC200-7(Z=110)  12  EX200-224  EX300-5
1  SK07-17  SK6013  SK200-32  CAT2158  CAT320C
2  SK07-28  SK907B14  SK200-53  CAT215B9  CAT320L
3  SK07-1-N29  SK10015  SK200-64  CAT22610  CAT325
4  SK07-N210  SK120-516  SK3005  CAT305.511  CAT325C
5  SK0311  SK200-1NOCartpillar6  CAT312NOVolvo
6  SK0912  SK200-21  E200B7  CAT320B1  VOLVO210(EC210)
1  HD1005  HD450-59  HD700-513  HD770-21  PS132
2  HD250-56  HD450-710  HD700-714  HD800-72  PS210
3  HD250-77  HD51611  HD770SE15  HD820-13  MX08-2
4  HD400-78  HD700-212  HD770-116  HD900-74  PS292
1  SH605  SH200A19  SH26013  SH3401  914/924
2  SH120A16  SH200A210  SH26514  SH350  
3  SH120A27  SH200A311  SH28015  SH430  
4  SH120A38  SH200C312  SH30016  SH40T  
1  R60-511  R2451  DH5511  DH300-5  
2  R60-712  R260-52  DH55-512  DH320  
3  R130-513  R2803  DH60-713  DH330-3  
4  R130-714  R2904  DH200-314  DH360-5  
5  R150W15  R3005  DH220-315  DH500  
6  R20016  R305-76  DH220-5    
7  R210-317  R3207  DH225-7    
8  R215-718  R335-78  DH10L    
9  R220-519  R3609  DH280    
10  R225-720  R45010  DH290    

Slewing Bearings for Cranes

Because of the light structure of the crane, slewing ring bearing is an essential and strategic part. Our slewing rings are widely used in kinds of cranes, such as tower cranes, ship deck cranes, mobile cranes, railway cranes and so on.

Slewing Bearings for ship & offshore

Because of the special condition for the slewing rings used for the offshore, we have special strong design on the sealing system and the surface protection. Our specific design satisfy the main manufacturers of the on board and harbour cranes, winches, davits and rubber tired gantry cranes as well as propellers.

All our slewing bearings follows the international certification standards and can accept the inspection such as DNV, GL and others.

Slewing Bearings for Wind Turbines

Wind Turbines Slewing ring bearings can be classified into three types: the yaw bearing, pitch or blade bearing, driving system bearing (spindle bearings and gearbox bearing).

The yaw bearings install into the joint between tower and cabin, the pitch bearing installed into the joint between the blades and hubs. Each wind turbine has a set of yaw bearing and three sets of pitch bearing.

Structure of Yaw and Pitch Bearing

Generally, the structure of yaw and pitch bearings is single row ball slewing ring four-point contact bearing and double row ball slewing ring four-point contact bearing. and both these two types can be further divided into bearings without gears, bearings with internal gears ,bearings with outer gears according to gear position .

Fastening Bolts for Slewing Bearings 

DRE can supply the fastening bolts for the slewing ring bearings for mounting. We can produce as customer requirements. Normally the bolts can use the same material as the slewing ring bearings, or also can use others as requires. And we can produce the match pinion of slewing rings according to the spec if customers purchase pinion together with slewing bearings.

Slewing ring refurbishment  

Slewing ring refurbishment can offer significant savings when compared to a replacement slewing ring. Repair or refurbishment is usually only economic on slewing ring with large bore size and depends on the degree of wear or damage. Repair on smaller slewing rings is possible, but only becomes economic on larger batch sizes.

Certain types of damage are easy to repair, such as minor surface scuffing or light staining. Moderate surface conditions, such as corrosion, indentation of fine spalling, and more difficult tpo repair and will probably require raceway grinding. Also some bad condition we have to change the rollers/balls and cage, re-grinding on the raceway and surface. It all depends on the status of the slewing rings.


So if you want to repair on your slewing ring, please contact with us to show the condition of the slewing rings and better the photos to let us check if can be repaired and give you the repair suggestion on this.

Forged Rings for Slewing Rings

We can also provide Forged Rings for Slewing Rings .The hardness is tested by Brinell Apparatus (HBW10/3000). The Brinell Apparatus may bring a depression in the surface of the forged rings.

We determine the hardness according to the diameter of depression in the forged rings.

Production Show

High Precise Preload Cross Roller Bearings

Test Reports and Certifications

every step of processing from raw material to packaging is controled strictly. Slewing bearing test report will be sent with commercial invoice/packing list and other documents to customer directly. 

High Precise Preload Cross Roller Bearings

DRE Customer Reference

High Precise Preload Cross Roller Bearings

Our Service

Winthin 24 hours reply
Professional exporting handling
Professional bearings knowledge
Custom service
OEM service
Stock service
Kinds of payment terms
Technical Supports
Sample available
Any shipping method

If you have any question about our products and technical details, please feel free to contact me!

Contact Info:

Joyce Wang
Export Sales
DRE Engineering Co., Ltd
Tel: 0086-411-84618155
Fax: 0086-411-84633077
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