• 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

 

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.




 





Preload Cross Roller Bearings with External Gear Teeth
 

Designation	Mass   ≈kg	Dimensions				Fixing holes				Gear teeth			Tooth force		Basic load ratings				Internal clearance  /preload
		Da	di2) +IT7	Di2) +IT7	da	La	na3)	Li	ni3)	d0	m	z	Fz norm	Fz max	axial		radial
															dyn. Ca	stat. C0a	dyn. Cr	stat. C0r
													kN	kN	kN	kN	kN	kN
XSA 14 0414 N	32	503.3	344	417	413-0.5	455	20	368	24	495	5	99	15.9	23.6	229	520	146	250	0.01 incl. 0.03
XSA 14 0544 N	44	640.3	474	547	543-0.5	585	28	498	32	630	6	105	21.3	31.5	270	680	170	330	0.01 incl. 0.03
XSA 14 0644 N	52	742.3	574	647	643-0.6	685	32	598	36	732	6	122	21.3	31.5	290	800	185	395	0.01 incl. 0.04
XSA 14 0744 N	59	838.1	674	747	743-0.6	785	36	698	40	828	6	138	21.3	31.5	315	930	200	455	0.01 incl. 0.04
XSA 14 0844 N	71	950.1	774	847	843-0.6	885	36	798	40	936	8	117	28.3	42	340	1050	215	510	0.01 incl. 0.04
XSA 14 0944 N	77	1046.1	874	947	943-0.7	985	40	898	44	1032	8	129	28.3	42	360	1170	227	580	0.01 incl. 0.05
XSA 14 1094 N	91	1198.1	1024	1097	1093-0.7	1135	44	10478	48	1184	8	148	28.3	42	390	1360	246	670	0.01 incl. 0.05

Preload Cross Roller Bearings with Internal Gear Teeth

 

Designation	Mass   ≈kg	Dimensions				Fixing holes				Gear teeth			Tooth force		Basic load ratings				Internal clearance  /preload
		Da2) -IT7	di	Di	da2) -IT7	La	na3)	Li	ni3)	d0	m	z	Fz norm	Fz max	axial		radial
															dyn. Ca	stat. C0a	dyn. Cr	stat. C0r
													kN	kN	kN	kN	kN	kN
XSL 14 0414 N	31	484	325	415+0.5	411	460	24	375	24	335	5	67	17.7	26.2	229	520	146	250	0.01 incl. 0.03
XSL 14 0544 N	43	614	444	545+0.5	541	590	32	505	32	456	6	76	23.7	35	270	680	170	330	0.01 incl. 0.03
XSL 14 0644 N	50	714	546	645+0.6	641	690	36	605	36	558	6	93	23.7	35	290	800	185	395	0.01 incl. 0.04
XSL 14 0744 N	58	814	648	745+0.6	741	790	40	705	40	660	6	110	23.7	35	315	930	200	455	0.01 incl. 0.04
 XSL 14 0844 N	69	914	736	845+0.6	841	890	40	805	40	752	8	94	31.4	46.7	340	1050	215	510	0.01 incl. 0.04
 XSL 14 0944 N	76	1014	840	945+0.7	941	990	44	905	44	856	8	107	31.4	46.7	360	1170	227	580	0.01 incl. 0.05
 XSL 14 1094 N	91	1164	984	1095+0.7	1091	1140	48	1055	48	1000	8	125	31.4	46.7	390	1360	246	670	0.01 incl. 0.05

Preload Cross Roller Bearings without Gear Teeth
 

Designation	Mass   ≈kg	Dimensions				Fixing holes				Basic load ratings				Internal clearance  /preload
		Da2) -IT7	di2) +IT7	Di	da	La	na3)	Li	ni3)	axial		radial
										dyn. Ca	stat. C0a	dyn. Cr	stat. C0r
										kN	kN	kN	kN
XSU 14 0414 N	28	484	344	415+0.5	413-0.5	460	24	368	24	229	520	146	250	0.01 incl. 0.03
XSU 14 0544 N	38	614	474	545+0.5	543-0.5	590	32	498	32	270	680	170	330	0.01 incl. 0.03
XSU 14 0644 N	44	714	574	645+0.6	643-0.6	690	36	598	36	290	800	185	395	0.01 incl. 0.04
XSU 14 0744 N	52	814	674	745+0.6	743-0.6	790	40	698	40	315	930	200	455	0.01 incl. 0.04
 XSU 14 0844 N	60	914	774	845+0.6	843-0.6	890	40	798	40	340	1050	215	510	0.01 incl. 0.04
 XSU 14 0944 N	67	1014	874	945+0.7	943-0.7	990	44	898	44	360	1170	227	580	0.01 incl. 0.05
 XSU 14 1094 N	77	1164	1024	1095+0.7	1093-0.7	1140	48	1048	48	390	1360	246	670	0.01 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.

Slewing Bearing Transportation 

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

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.
 

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

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

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

Production Show



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. 

DRE Customer Reference



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