Guide to Thrust Spherical Roller Bearings

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Guide to Thrust Spherical Roller Bearings

Thrust spherical roller bearings are bearings composed of outer rings, inner rings, rollers, retainers and other components. Among them, the outer ring and inner ring are made of high-quality steel, the rollers are generally cylindrical or conical, and the retainer can keep the appropriate gap between the rollers. This structural design enables thrust spherical roller bearings to withstand large axial loads and small radial loads. Compared with traditional rolling bearings, thrust spherical roller bearings have higher performance in terms of load capacity, angular displacement capacity and self-centering performance.

Table of Contents

Thrust spherical roller bearing advantages

High load capacity

The large number of rollers with optimal conformity to the washer raceway enables the bearings to withstand heavy axial loads and simultaneously acting radial loads.

Separable design

Spherical roller thrust bearings are separable, so the housing washers and shaft washers as well as the roller and cage assemblies can be mounted and disassembled separately. This also facilitates maintenance inspections.

Accommodate misalignment

Spherical roller thrust bearings are self-aligning and can accommodate misalignments of 1°-3°.

High-speed capability

The cage design and the optimal fit of the rollers to the washer raceways make the bearings suitable for relatively high speeds.

Long service life

The special roller profile reduces edge stresses at the roller/raceway contact.

Low friction

The optimized roller end/flange contact keeps friction heat low, even at high speeds.

Load of thrust spherical roller bearings

The working principle of thrust spherical roller bearings is to use the relative motion of rollers and raceways to convert the input rotational motion into motion with a certain direction and force. When external force acts on the rollers and raceways, rolling friction will be generated between the rollers and raceways, thereby realizing the transmission of axial force. At the same time, the thrust spherical roller bearing can automatically adjust the position between the roller and the raceway due to its aligning ability, thereby reducing the misalignment caused by different working conditions and improving the bearing’s load capacity and service life.

Thrust spherical roller bearings are often used in equipment that rotates at high speed and bears heavy loads or impact loads. The load direction it bears can be divided into two directions: radial and axial. Among them, the radial load is perpendicular to the axial direction, and the axial load is applied in the axial direction. Thrust spherical roller bearings can bear radial and axial loads at the same time, but the radial load must not exceed 55% of the axial load. If the load borne by the bearing is not completely perpendicular to the axis during use, but in an oblique direction, it is necessary to use a self-centering bearing to ensure that the bearing is properly stressed within an acceptable range.

Minimum axial load

The minimum axial load Famin required for the thrust spherical roller bearing to work (take the larger value calculated by the following two formulas)
Famin=C0a/1000
Famin=1.8Fr+1.33(C0a/2000)2x
Where:
Famin: Minimum axial load kN required
n: Speed
C0a: Basic rated static load kN
Fr: Radial load kN

Equivalent dynamic load
P=Fa+1.2Fr
Equivalent static load
PO=Fa+2.7Fr

Thrust spherical roller bearing categories

Cylindrical spherical roller thrust bearings are designed to accommodate shafts with cylindrical bores while maintaining a concentric bearing shaft. This design is ideal for heavy loads due to their large contact surface area and roller symmetry.

Tapered spherical roller thrust bearings have a tapered inner ring that allows the bearing to be mounted directly on the shaft. Due to the tapered design, they have excellent performance in both radial and axial directions.

Split spherical roller thrust bearings feature a split outer ring design that allows for quick and easy installation onto the shaft. This type of bearing is ideal for applications that require frequent maintenance, as they can be removed without removing the shaft itself. In addition, they also excel in applications with load fluctuations and shaft misalignment.

Part Number	Bore Dia	Outer Dia	Height	Outside Diameter(d1)	Roller Material	Dynamic Thrust Load	Static Thrust Load	Weight
292/500	500 mm	670 mm	103 mm	654 mm	Steel	537293 lbf	2810112 lbf	100 kg
292/530 EM	530 mm	710 mm	109 mm	675 mm	Steel	699156 lbf	3439577 lbf	115 kg
292/560	560 mm	750 mm	115 mm	732 mm	Steel	672179 lbf	3596943 lbf	140 kg
292/600 EM	600 mm	800 mm	122 mm	760 mm	Steel	840785 lbf	4181446 lbf	170 kg
292/630 EM	630 mm	850 mm	132 mm	810 mm	Steel	1072339 lbf	5305491 lbf	210 kg
292/800 EM	800 mm	1060 mm	155 mm	1010 mm	Steel	1474747 lbf	7755909 lbf	380 kg
29230 E	150 mm	215 mm	39 mm	200 mm	Steel	91722 lbf	359694 lbf	4.3 kg
29236 E	180 mm	250 mm	42 mm	234 mm	Steel	11128 lbf	45861 lbf	5.8 kg
29240 E	200 mm	280 mm	48 mm	260 mm	Steel	147475 lbf	595744 lbf	9.3 kg
29244 E	220 mm	300 mm	48 mm	280 mm	Steel	155118 lbf	674427 lbf	10 kg
29248	240 mm	340 mm	60 mm	330 mm	Steel	179622 lbf	775591 lbf	16.5 kg
29252	260 mm	360 mm	60 mm	350 mm	Steel	183669 lbf	820553 lbf	18.5 kg
29256	280 mm	380 mm	60 mm	370 mm	Steel	19401 lbf	899236 lbf	19.5 kg
29260	300 mm	420 mm	73 mm	405 mm	Steel	240546 lbf	1079083 lbf	30.5 kg
29264	320 mm	440 mm	73 mm	430 mm	Steel	249538 lbf	1146526 lbf	33 kg
29268	340 mm	460 mm	73 mm	445 mm	Steel	254034 lbf	1213968 lbf	33.5 kg
29272	360 mm	500 mm	85 mm	485 mm	Steel	328221 lbf	1528701 lbf	52 kg
29276	380 mm	520 mm	85 mm	505 mm	Steel	355198 lbf	1719788 lbf	53 kg
29280	400 mm	540 mm	85 mm	526 mm	Steel	361942 lbf	1798472 lbf	55.5 kg
29284	420 mm	580 mm	95 mm	564 mm	Steel	44737 lbf	2203128 lbf	75.5 kg
29288	440 mm	600 mm	95 mm	585 mm	Steel	465355 lbf	2338013 lbf	78 kg
29292	460 mm	620 mm	95 mm	605 mm	Steel	465355 lbf	2382975 lbf	81 kg
29296	480 mm	650 mm	103 mm	635 mm	Steel	528301 lbf	2652746 lbf	98 kg
293/500	500 mm	750 mm	150 mm	725 mm	Steel	1009392 lbf	4586102 lbf	235 kg
293/530 EM	530 mm	800 mm	160 mm	741 mm	Steel	1319629 lbf	5957437 lbf	265 kg
293/630 EM	630 mm	950 mm	190 mm	880 mm	Steel	1899636 lbf	854274 lbf	485 kg
293/710 EM	710 mm	1060 mm	212 mm	985 mm	Steel	2236849 lbf	10228807 lbf	610 kg
293/800 EM	800 mm	1180 mm	230 mm	1099 mm	Steel	2540341 lbf	12364492 lbf	810 kg
29317 E	85 mm	150 mm	39 mm	134 mm	Steel	85427 lbf	238297 lbf	2.75 kg
29318 E	90 mm	155 mm	39 mm	138 mm	Steel	89924 lbf	242794 lbf	2.85 kg
29320 E	100 mm	170 mm	42 mm	152 mm	Steel	104536 lbf	290004 lbf	3.65 kg
29322 E	110 mm	190 mm	48 mm	171 mm	Steel	137133 lbf	388919 lbf	5.3 kg
29324 E	120 mm	210 mm	54 mm	188 mm	Steel	171979 lbf	476595 lbf	7.35 kg
29326 E	130 mm	225 mm	58 mm	203 mm	Steel	19446 lbf	562022 lbf	9 kg
29328 E	140 mm	240 mm	60 mm	216 mm	Steel	220313 lbf	640705 lbf	10.5 kg
29330 E	150 mm	250 mm	60 mm	223 mm	Steel	224809 lbf	640705 lbf	11 kg
29332 E	160 mm	270 mm	67 mm	243 mm	Steel	265275 lbf	775591 lbf	14.5 kg
29334 E	170 mm	280 mm	67 mm	251 mm	Steel	269771 lbf	798072 lbf	15 kg
29336 E	180 mm	300 mm	73 mm	270 mm	Steel	321477 lbf	966678 lbf	19.5 kg
29338 E	190 mm	320 mm	78 mm	285 mm	Steel	366439 lbf	1067842 lbf	23.5 kg
29340 E	200 mm	340 mm	85 mm	304 mm	Steel	418145 lbf	1236449 lbf	28.4 kg
29344 E	220 mm	360 mm	85 mm	326 mm	Steel	449618 lbf	1416296 lbf	31.2 kg
29348 E	240 mm	380 mm	85 mm	345 mm	Steel	45861 lbf	1472499 lbf	35.5 kg
29352 E	260 mm	420 mm	95 mm	382 mm	Steel	573263 lbf	1865914 lbf	49 kg
29356 E	280 mm	440 mm	95 mm	401 mm	Steel	573263 lbf	1944597 lbf	53 kg
29360 E	300 mm	480 mm	109 mm	434 mm	Steel	696908 lbf	2382975 lbf	75 kg
29364 E	320 mm	500 mm	109 mm	454 mm	Steel	75311 lbf	251786 lbf	78 kg
29368	340 mm	540 mm	122 mm	520 mm	Steel	609232 lbf	2472898 lbf	105 kg
29372	360 mm	560 mm	122 mm	540 mm	Steel	620473 lbf	2607784 lbf	110 kg
29376	380 mm	600 mm	132 mm	580 mm	Steel	750862 lbf	3147325 lbf	140 kg
29380	400 mm	620 mm	132 mm	596 mm	Steel	775591 lbf	3282211 lbf	150 kg
29384	420 mm	650 mm	140 mm	626 mm	Steel	840785 lbf	3596943 lbf	170 kg
29388 EM	440 mm	680 mm	145 mm	626 mm	Steel	1169007 lbf	4338813 lbf	180 kg
29392	460 mm	710 mm	150 mm	685 mm	Steel	968927 lbf	427137 lbf	215 kg
294/1000 EF	1000 mm	1670 mm	402 mm	1531 mm	Steel	6991558 lbf	31473252 lbf	3383 kg
294/1060 EF	1060 mm	1770 mm	426 mm	1615 mm	Steel	7508619 lbf	35070195 lbf	4280 kg
294/500 EM	500 mm	870 mm	224 mm	795 mm	Steel	210646 lbf	8992358 lbf	560 kg
294/530 EM	530 mm	920 mm	236 mm	840 mm	Steel	2360494 lbf	9891594 lbf	650 kg
294/560 EM	560 mm	980 mm	250 mm	890 mm	Steel	2697707 lbf	11465256 lbf	810 kg
294/600 EM	600 mm	1030 mm	258 mm	940 mm	Steel	2944997 lbf	12589301 lbf	845 kg
294/630 EM	630 mm	1090 mm	280 mm	995 mm	Steel	3237249 lbf	13938155 lbf	1040 kg
294/670 EM	670 mm	1150 mm	290 mm	1045 mm	Steel	3462058 lbf	15287008 lbf	1210 kg
294/710 EF	710 mm	1220 mm	308 mm	1110 mm	Steel	3956637 lbf	17197884 lbf	1500 kg
294/750 EF	750 mm	1280 mm	315 mm	1170 mm	Steel	4203927 lbf	1910876 lbf	1650 kg
294/800 EF	800 mm	1360 mm	335 mm	1250 mm	Steel	4541141 lbf	20907232 lbf	2025 kg
294/850 EF	850 mm	1440 mm	354 mm	1315 mm	Steel	5372934 lbf	24279366 lbf	2390 kg
294/900 EF	900 mm	1520 mm	372 mm	1394 mm	Steel	6002399 lbf	27426691 lbf	2650 kg
294/950 EF	950 mm	1600 mm	390 mm	1470 mm	Steel	6339612 lbf	29674781 lbf	3065 kg
29412 E	60 mm	130 mm	42 mm	112 mm	Steel	87675 lbf	2057 lbf	2.6 kg
29413 E	65 mm	140 mm	45 mm	120 mm	Steel	102288 lbf	242794 lbf	3.2 kg
29414 E	70 mm	150 mm	48 mm	129 mm	Steel	116901 lbf	281011 lbf	3.9 kg
29415 E	75 mm	160 mm	51 mm	138 mm	Steel	134885 lbf	321477 lbf	4.7 kg
29416 E	80 mm	170 mm	54 mm	147 mm	Steel	150622 lbf	366439 lbf	5.6 kg
29417 E	85 mm	180 mm	58 mm	155 mm	Steel	165235 lbf	404656 lbf	6.75 kg
29418 E	90 mm	190 mm	60 mm	164 mm	Steel	183219 lbf	449618 lbf	7.75 kg
29420 E	100 mm	210 mm	67 mm	182 mm	Steel	220313 lbf	562022 lbf	10.5 kg
29422 E	110 mm	230 mm	73 mm	199 mm	Steel	265275 lbf	674427 lbf	13.5 kg
29424 E	120 mm	250 mm	78 mm	216 mm	Steel	307988 lbf	775591 lbf	17.5 kg
29426 E	130 mm	270 mm	85 mm	234 mm	Steel	350702 lbf	910476 lbf	22 kg
29428 E	140 mm	280 mm	85 mm	245 mm	Steel	366439 lbf	966678 lbf	23 kg
29430 E	150 mm	300 mm	90 mm	262 mm	Steel	418145 lbf	1146526 lbf	28 kg
29432 E	160 mm	320 mm	95 mm	279 mm	Steel	467603 lbf	125893 lbf	32 kg
29434 E	170 mm	340 mm	103 mm	297 mm	Steel	530549 lbf	1472499 lbf	44.5 kg
29436 E	180 mm	360 mm	109 mm	315 mm	Steel	584503 lbf	1652346 lbf	52.5 kg
29438 E	190 mm	380 mm	115 mm	332 mm	Steel	640705 lbf	1798472 lbf	60.5 kg
29440 E	200 mm	400 mm	122 mm	350 mm	Steel	719389 lbf	202328 lbf	72 kg
29444 E	220 mm	420 mm	122 mm	371 mm	Steel	75311 lbf	2169406 lbf	75 kg
29448 E	240 mm	440 mm	122 mm	391 mm	Steel	76435 lbf	2293051 lbf	80 kg
29452 E	260 mm	480 mm	132 mm	427 mm	Steel	910476 lbf	2900035 lbf	105 kg
29456 E	280 mm	520 mm	145 mm	464 mm	Steel	1101564 lbf	3439577 lbf	135 kg
29460 E	300 mm	540 mm	145 mm	485 mm	Steel	1124045 lbf	3731828 lbf	140 kg
29464 E	320 mm	580 mm	155 mm	520 mm	Steel	1281411 lbf	427137 lbf	175 kg
29468 E	340 mm	620 mm	170 mm	557 mm	Steel	150622 lbf	503572 lbf	220 kg
29472 EM	360 mm	640 mm	170 mm	580 mm	Steel	1393815 lbf	476595 lbf	230 kg
29476 EM	380 mm	670 mm	175 mm	610 mm	Steel	1528701 lbf	5395415 lbf	260 kg
29480 E	400 mm	710 mm	185 mm	645 mm	Steel	1719788 lbf	5957437 lbf	310 kg
29480 EM	400 mm	710 mm	185 mm	645 mm	Steel	1719788 lbf	5957437 lbf	310 kg
29484 EM	420 mm	730 mm	185 mm	665 mm	Steel	175351 lbf	6182246 lbf	325 kg
29488 EM	440 mm	780 mm	206 mm	710 mm	Steel	202328 lbf	7193886 lbf	410 kg
29492 EM	460 mm	800 mm	206 mm	730 mm	Steel	2090723 lbf	75311 lbf	425 kg

Aubearing Model Number	d	D	B	Weight (kg)	SKF Model Number	FAG Model Number
829232	160	300	110	3.5	350980K	515805
829234	170	240	48	12	350982	528974
829236	180	280	90	21	353162	528974
829324	200	340	90	19.5	351019C	528876
829324H	220	300	98	14.5	351021C	528976
829740	230	320	70	5	354182C	520985
829744	240	320	86	5.5	354186C	520986
829752	250	360	90	7.5	350986C	550825
829760	260	400	104	13.5	351011C	550925
829764	280	420	116	23	351014C	521003
829768	300	460	125	28.5	351012C	521201
829772	320	480	130	30.5	351020C	521401
829776	340	520	137	42.5	351115C	521604
829776	350	540	135	112	353006	522008
829772	360	560	200	180		524194
829976	380	580	130	108		513285
829976	380	580	130		351175C
829976H	380	650	215		DFDB353204	545936
829978	400	650	210			540162
829784	410	560	150		351121C	509392
829784H	420	620	185		DFDB353200/HA3	545991
829786	440	640	167		353151	534038
829788	450	645	155		350911C/D	513401
829990	470	720	200		353151
829992	480	710	218
829574	530	710	218
829574	550	760	230
829776	670	900	230
829776	690	900	230
59736	180	250	50	8.2
59836	190	280	52	23.7
59936	192	310	54.82	18.5
53084	240	360	56	16.1
53284	250	360	60	23.8
53484	260	380	60	15.3
53084	280	400	65	35.2
53284	300	420	65	25.4
53484	320	440	70	31.4
53684	340	460	74	35.2
53884	360	480	74	40.5
59836	380	500	100	61.2
59936	400	520	100	58.8

Inner diameter size range: 60mm~1120mm
Outer diameter size range: 130mm~1460mm
Height size range: 39mm~354 mm

Spherical roller thrust bearings are made of high-quality materials such as chrome steel, which provide excellent strength and durability. Cages are generally made of brass solid cages and stamped steel cages.

Application of thrust spherical roller bearings

Thrust spherical roller bearings are widely used in machinery manufacturing, petroleum, textile, chemical, light industry, bearings and other industries. It is also suitable for equipment and machinery that rotates at high speed and bears heavy loads or impact loads, such as wheeled excavators, slewing bearings, road rollers, hydraulic oil pumps, hydroelectric generators, wind turbines, etc. The following are several main application scenarios of thrust spherical roller bearings:

1. Automobile field: Thrust spherical roller bearings play an important role in key parts such as automobile transmissions, differentials, and engines, and can withstand high speed and high torque requirements.

2. Ship field: Thrust spherical roller bearings are widely used in transmission devices such as main engines and auxiliary engines of large ships, and can withstand high power and high torque generated by ships under the impact of waves and water flow.

3. Aerospace field: Thrust spherical roller bearings are used in key parts such as aircraft engines and landing gears, and can withstand extreme working conditions such as high speed, high temperature and high vibration.

4. Engineering machinery field: Thrust spherical roller bearings are widely used in turntables and swing mechanisms of heavy equipment such as excavators, loaders, bulldozers, etc., and can withstand large vibration and impact loads.

Thrust spherical roller bearing installation

When using thrust spherical roller bearings, attention must be paid to the installation and maintenance of the bearings to ensure the normal operation of the bearings. In addition, it is necessary to select the appropriate bearing model and specifications according to the actual situation to ensure that it can withstand the expected load and service life. Because thrust roller bearings are high-precision products, improper assembly can easily damage the thrust roller bearing grooves, resulting in damage to the thrust roller bearings. Thrust roller bearings should have a special mold when assembled and should not be knocked at will.

Fit

The outer ring of the spherical roller bearing should not be fitted with an interference fit with the housing hole of the bearing seat. The fit between the inner ring and the shaft neck should not be too tight, and it is required that the nut should be adjusted during installation to produce a flexible axial displacement. Because if the spherical roller bearing adopts an interference fit, it is easy to change the contact angle of the bearing, resulting in uneven distribution of the bearing load and high temperature rise. Therefore, the installation fit of the inner and outer rings of this type of bearing with the shaft neck and the housing hole of the bearing seat should generally be such that the thumbs of both hands can just push the bearing into the shaft neck and the housing hole.

Clearance

For the installation axial clearance of the spherical roller bearing, it can be adjusted by using the adjusting nut on the shaft neck, adjusting gasket and the thread in the bearing seat hole, or by using a preload spring. The size of the axial clearance is related to the arrangement of the bearing during installation, the distance between the bearings, and the materials of the shaft and the bearing seat, and can be determined according to the working conditions. For high-load and high-speed spherical roller bearings, when adjusting the clearance, the effect of temperature rise on the axial clearance must be considered, and the clearance reduction caused by temperature rise must be estimated. In other words, the axial clearance should be appropriately adjusted to be larger.

For low-speed and vibration-bearing bearings, clearance-free installation or preload installation should be adopted. The purpose is to make the rollers and raceways of the spherical roller bearings have good contact, evenly distribute the load, and prevent the rollers and raceways from being damaged by vibration impact. After adjustment, the size of the axial clearance is checked with a micrometer. The method is to first fix the micrometer on the machine body or the bearing seat, so that the micrometer contact is against the smooth surface of the shaft, and the shaft is pushed left and right along the axial direction. The maximum swing of the needle is the axial clearance value.

Foreign matter

When the thrust roller bearing is installed on the rotor for dynamic balancing, it is easy for the iron filings generated during dynamic balancing to enter the thrust roller bearing. Therefore, it is best to do dynamic balancing before installing the thrust roller bearing. In order to facilitate assembly, some manufacturers apply some oil or grease to the thrust roller bearing chamber for lubrication during assembly, but it is often difficult for operators to control the amount. If there is a lot of oil or grease accumulated in the thrust roller bearing chamber, it is easy to enter the thrust roller bearing along the shaft when the thrust roller bearing rotates. It is best not to apply oil or grease to the thrust roller bearing chamber. If it is necessary to apply it, it must be controlled not to have accumulation in the thrust roller bearing chamber.

Prevention of paint rust

The characteristic of paint rust is that it often occurs in sealed motors. The motor sounds very good during assembly, but after being stored in the warehouse for some time, the abnormal noise of the motor becomes very loud, and the thrust roller bearing is seriously rusted after being removed. In the past, many manufacturers would think that it was a problem with the thrust roller bearing. After continuous publicity by bearing manufacturers, motor factories have realized that it is mainly a problem with insulating paint. This problem is mainly caused by the acidic substances volatilized from the insulating paint forming corrosive substances under certain temperature and humidity, which corrode the groove of the thrust roller bearing and cause the thrust roller bearing to be damaged. The only solution to this problem is to use good insulating paint and assemble it after drying and ventilation for a period of time.

Conclusion

Spherical roller thrust bearings have asymmetric spherical rollers. The rollers fit closely to the inner and outer ring raceways, giving the bearings a high load carrying capacity and are internally self-aligning, which can accommodate high axial loads or combined axial and radial loads. These bearings are suitable for applications where the shaft is prone to angular misalignment relative to the housing bore. Aubearing is continuously expanding its range of spherical roller bearings and spherical thrust bearings. If you have any questions about thrust spherical roller bearings, please do not hesitate to contact us.