29418E bearing90x190x60mm

Product Model:

29418E

Structure: Spherical Roller Thrust BearingInside Diameter: 90 mmOutside Diameter: 190 mmThickness: 60 mmSeals Type: No SealMaterial: Gcr15Precision Rating: P0-P5Brand: Weight: 7.38 KGPayment term: T/T,L/C,PaypalDelivery time: 3-5days

29418E bearing90x190x60mm Technical Parameters

Products name	29418E bearing90x190x60mm
ID*OD*W(mm)	90x190x60mm
Weight(kg)	7.38
Material	Chrome steel (Gcr15),High Carbon Steel-GCR11,Stainless Steel 440C,304,316
Clearance	C0,C1,C2,C3,C4,C5
Category	Spherical Roller Thrust Bearing
Shipping	UPS,DHL,FEDEX,TNTOR EMS

 The 29418E Bearing  is suitable for high speeds and can operate withlow noise.
The dimensions of the 29418E Bearing  are: Bore (or inner diameter)90 mm, Outer diameter 190mm and Width (or thickness) 60mm.

Preloading and Stiffness of FAG Super Precision Bearing Arrangement Design and Application Example

In practical applications, a large number of different types of spindle bearings are used. The choice of FAG spindle bearing type and arrangement depends on the characteristics of the application: eg turning, milling, grinding, etc. However, operating conditions and economics also play a decisive role in the final selection and technical requirements. In order to achieve high precision requirements (P4 or higher), bearings must generally operate with preload or at least zero clearance. The temperature rise at the highest speed should be as low as possible (speed index, up to n~dm = 2~106 mm/min. under grease lubrication, up to 3,1~106 mm/min. under oil lubrication). . The above requirements can be achieved by using super-precision bearings and correspondingly precise mating components. The following information can help select the most suitable bearing and bearing arrangement in the application, including the following: • Pretensioning • Stiffness • Contact angle • Rolling element size and material • Bearing spacing • Sealing • Steps in bearing design • Comparison of bearing arrangements • Bearing samples.

Pre-tightening: Rigid preloaded bearings are sensitive to changes in the temperature difference between the shaft and the housing, especially when the distance between the bearings is small. If the floating bearing fails to float in the axial direction, the pre-tightening force in the bearing group will greatly increase, and even the internal clearance of the bearing will be completely eliminated; radial stress will also be generated, especially for a spindle bearing with a contact angle of 15°. These phenomena can occur in cylindrical roller bearings and sliding-fit spindle bearings. In contrast, if the elastic preload is used, the bearing set with the contact angle of 25° and the larger bearing spacing is chosen to be less sensitive to temperature changes. In general, the operating temperature of ceramic ball bearings is lower, and the temperature rise ΔT is lower in the rigid preload system than in the steel ball bearings. The speed reduction factor (see Table 2) is used for rigid preloaded bearings. In elastic preloading (by spring or hydraulic pressure), the bearing speed can reach the value in the bearing parameter table due to the reduced heat sensitivity. The pre-tightening force must at least reach the value of the preloading force of the medium preloaded bearing (with suffix M) (see the bearing parameter table).

  Stiffness: The stiffness of a bearing system is affected by the diameter of the shaft, the number of bearings, the size of the bearings, the preload, and the size of the contact angle. Although the radial stiffness of a 15° contact angle bearing is 10% higher than that of a 25° contact angle bearing, its axial stiffness is 45% lower. If the entire spindle bearing and cantilever system is considered, the radial stiffness of the former is better than the latter because the bearing span of the 25° contact angle bearing arrangement is larger than that of the 15° contact angle bearing. Rigid preloaded bearings are stiffer than the data in the sample due to installation. In operation, due to the high-speed centrifugal force and the thermal expansion of the shaft and the inner ring, the bearing rings expand and the rigidity increases.

Select the appropriate contact angle according to the rolling element size and material selection of the bearing

Choosing suitable contact angle bearings Bearings with two contact angles have different performance and application areas (as shown in Table 1). Selecting the bearings from the size and material of the rolling elements All the bearings of the main shaft are "B" in the model with large-sized balls, and the rest are small balls. Large ball bearings have higher bearing capacity than small ball bearings and are therefore more suitable for high-load applications. In contrast, the ball bearing has better high-speed adaptability. Ceramic ball bearings have an additional advantage in speed (see the FAG spindle bearing parameter table). The X-life ultra-long-life bearing consists of a Cronidur 30 ferrule and a ceramic ball. The small ball X-life bearing model starts with XC, and the large ball bearing starts with XCB. The comparison of the specifications and performance parameters of the following spindle bearings can help in selecting the right bearing.

The contact angle is divided into: 15° 25°.
Applicable performance options: Radial stiffness Axial stiffness Radial system stiffness Radial loading capacity Axial bearing capacity Radial axial composite bearing capacity Higher speed and inner and outer ring temperature difference Inner and outer ring temperature difference ΔT is larger ΔT is smaller.
Application selection: Grinding lathe Ultra-precision machine tool milling machine Belt drive side bearing arrangement Drilling machine machining center Electric spindle.

Ball Size/Sphere Material Load Speed ​​Life Bearing Type Large/ Ball High Medium Good B... Small/Steel Medium High Good HS.. Large/Ceramic Ball Medium High Good HBC.. Small/Ceramic Ball Low High Best HC. .X-life ultra-long-life bearing optimal optimal optimal XC.., XCB..

IKO joint bearing nominal model and accuracy

   The nominal model number of IKO articulated bearings consists of the type designations, dimensions and auxiliary marks. The arrangement is shown below. Example of arranging the nominal model Model number Dimensions SB 20 Joint IKO bearing model Nominal model alignment example 1 Example 2 Model Marking dimension Auxiliary mark GE 30 Bearing model EC 2RS Inner ring inner diameter (30 mm) With gasket Inner ring inner diameter ( 20mm) Accuracy The tolerance of the metric series joint bearing is shown in Table 2.


   GE's allowable tolerances are values before and after the outer ring split. The allowable tolerances for SB, SB...A are the values before the outer ring split and before the surface treatment. The allowable tolerance of GE...EC is the value before the outer ring split. Refer to Table 3 for allowable tolerances of IKO inch series joint bearings. The allowable tolerance of the inner diameter is the value after the surface treatment, and the other allowable tolerance is the value before the outer ring split and before the surface treatment. Sometimes there are some differences from the tolerances due to the surface treatment, but it does not affect the performance of the bearing.

IKO joint bearing clearance and recommended cooperation

The radial internal clearance of the IKO joint bearing is the value before the outer ring is split. Refer to Table 4, Table 5 and Table 6. The radial internal clearance of the Imperial series is shown in the dimension table. Our company also sells joint bearings other than the above clearances. Please contact Qingdao Ruijing Mechanical and Electrical Equipment Co., Ltd. for consultation. Radial internal clearance of IKO refueling spherical plain bearings SB, SB...A Radial internal clearance of refueling spherical plain bearings GE Radial internal clearance of refueling spherical plain bearings GE...EC.


   The recommended fit for IKO joint bearings is shown in Table 7 and Table 8. ■Selection of Bearings Table 7 Recommended Fitting Conditions for Refueled Spherical Plain Bearings Normal working conditions include non-directional loads. h6, j6 m6, n6 H7, J7 M7, N7 Tolerance class axis bearing housings Note When the bearing housing is a light alloy Recommend N7. Table 8 Recommended tolerances for mating shafts for non-lubricated joints Classes of tolerances for h6, j6 H7, J7, and K7 bearing housings Note K7 is recommended for light alloys.

FAG machine spindle bearing assembly

It must be ensured that the rolling contact surfaces have been adequately lubricated when the FAG machine spindle bearings are installed. The dimensional accuracy of adjacent structures must be checked. If you would like to obtain technical support during the initial installation, we recommend that you consult with an expert in industrial services, see page 146, chapter Equipment and services for rolling bearing installation and maintenance. Single-bearing solutions In a single-bearing solution, the compact design of the high-precision bearings YRTS and ZKLDF differs from that of the cross-roller bearings given in the TPI sample. High-precision bearings are consistent with the sample TPI 120, and high-precision bearings are installed in the sample TPI 103 (high-precision bearings subjected to combined loads). Cross-roller bearings Z-556 cross-roller bearings are supplied internally with a specific axial preload. For the cross roller bearing Z-549, axial preload is set during installation.


  When installing a double-bearing solution, it must be ensured on the one hand that radial deep groove ball bearings and angular contact ball bearings have good radial running. This can be achieved by centering the device or by aligning the axial retaining ring. On the other hand, axial preload must be set correctly by means of angular contact ball bearings. The three-bearing solution must ensure that the thrust deep groove ball bearings perform well in the radial direction relative to the radial cylindrical roller bearings. This can be achieved by centering or centering operations. Centripetal cylindrical roller bearings must be mounted with a specific radial preload, see Catalog SP 1, GMN Super Precision Bearings. Special attention must be paid to the preload of thrust bearings.
  Single bearing solutions Due to the size limitations of thrust/radial bearings YRTS and angular contact thrust ball bearings ZKLDF (see TPI 120, high-precision bearings subject to combined loads), cross-roller bearings are used here. The characteristics of these bearings are that the surrounding structure is simple, the design takes up less space, and the lubrication is convenient. The two-bearing solution uses two bearing configurations to meet the requirements of most applications. The main way of this kind of bearing configuration is a preloaded thrust bearing and another bearing, and the other bearing pretensions the thrust bearing and realizes a radial guiding function. This bearing solution can meet the high speed requirements. Angular contact ball bearings and tapered roller bearings can achieve this function. The three-bearing solution has a significant advantage in using a three-bearing arrangement where high accuracy and stiffness are required. However, the added workload due to installation must be considered.


  Single Bearing Solution Features In a single bearing solution, all loads are carried by a single bearing. This makes the surrounding structure of the bearing simple and compact. In addition, it is not necessary to center each bearing on one another, and lubrication is relatively simple because only one bearing needs to be lubricated. Cross roller bearings The rollers of these bearings are inclined relative to the shaft and the rollers are mounted in a continuous cross pattern. Separate the rollers with a plastic cage. The precision of these bearings is P5, and the running accuracy is better than P4. Cross roller bearings provide adjustable pretension or fixed pretension. High running accuracy In addition to the cross roller bearings described here, thrust/radial bearings YRTS and ZKLDF with diameters ranging from 200 mm to 460 mm are also suitable for these applications. Thrust/radial bearings ZKLDF can produce such bearings up to 1030 mm in diameter. These series of bearings have higher accuracy than THK crossed roller bearings. See TPI 120 for high precision bearings with combined loads.


  The solution characteristics of the two bearings Compared to the single bearing solution, the load on the two bearing solutions is shared by the two bearings. Thrust bearings mainly bear the weight of the table and the workpiece. Angular contact ball bearings are used to provide radial support while axially preloading the shafting. If thrust roller bearings are used, the system can withstand very high loads. For high speed applications, thrust ball bearings are recommended. During the design and installation process, it must be ensured that the minimum load can be satisfied under various load conditions. This also affects the recommended paired bearing configuration. Speed ​​In terms of speed, the use of ball bearing two-bearing solutions is a good choice for friction, lubrication and high precision. Accuracy dimensions and geometric tolerance accuracy are mainly determined by larger thrust bearings. The radial runout of the system is affected by the smaller diameter angular contact ball bearings.


  Solution Characteristics of Three Bearings In this arrangement, the combined loads are properly distributed to two thrust bearings and one radial bearing. This requires separate consideration of design requirements. The appropriate preload must be selected according to the load conditions to ensure the minimum axial load. Lubrication must be specially considered for lubrication. Although the thrust bearing needs more lubricating oil to dissipate heat, more oil is not necessary for a radial cylindrical roller bearing when the rotational speed is high. Depending on the design, radial bearings can, in most cases, be lubricated by smaller thrust bearings above, see page 124. Rigidity The high rigidity of the bearing system can be achieved by a fixed axial preload between the two thrust bearings and radial pretensioning of the radial bearings, typically up to 5 μm radial pretensioning, see section 126 Page and sample SP1, super precision bearings. Accuracy Dimensions and Geometrical Tolerances If each bearing is accurately combined, this bearing configuration can achieve very high accuracy.

FAG cross roller bearing load torque speed preload characteristics

Characteristics FAG cross roller bearings are high in rigidity and have better running accuracy than P4. Other precisions are P5 and they are preloaded. The outer ring of the bearing can be easily fixed to the surrounding structural parts with a gland. The internal structure of the cross roller bearing introduced here is particularly suitable for high speed conditions and is suitable for vertical hexagonal lathes. Compared with the high-precision bearings in the TPI120 bearing composite load, the same size cross-roller bearings have a higher rated dynamic load. With less rollers, stiffness is relatively reduced. These guidelines and data mainly target the list of cross-roller bearings. The outer ring rotates while the bearing is working. For radial loads and moments with axial loads Due to the O-arrangement of the cylindrical rollers, the bearings can withstand axial and radial loads, overturning moments and other compound loads, but only occupy one bearing space. Therefore, the design scheme of the two bearing arrangements can be replaced with a single bearing arrangement, as shown in FIGS. 1 and 2 . Fa = Axial load Fr = Radial load Mk = Overturning moment Fig. 1 Arrangement of two bearings 00017B7C Crossed roller bearings Fig. 2 uses only one cross roller bearing arrangement.


  THK cross roller bearing limit speed The limiting speed of a bearing is determined by the way the bearing is lubricated (grease and lubricant), see the dimension tables. If other speed limits are required, contact the Schaeffler Group Engineering Services. Preloading For the INA cross roller bearing Z-556, the pretensioning of the bearings is already established in the production plant. The bearing rings are fixed by end caps and bolts. For the cross-rolling seed bearing Z-549, the actual height record of the bearing inner ring will follow the bearing. The required preload is achieved by adjusting the clearance between the inner rings of the bearing. The gap between the bearing inner ring is adjusted by adjusting the spacer between the shaft end face and the end cap end face. It is recommended to adjust the thickness of the spacer as follows. To initially determine the thickness of the gasket, the first step is to make a gasket. The gasket should be slightly thicker to ensure a clearance of 0.25 mm to 0.5 mm. This provides a measurable axial play. The initial thickness of the gasket X1 is calculated as follows: the initial thickness of the X1 mm gasket, Figure 3 The width of the inner ring of the Bi mm bearing can refer to the inspection table L mm The depth of the inner ring support base s mm Reserve gap height, s = 0.25 mm to 0.5 mm. Figure 3 Initial shim thickness for bearing arrangement X10017746 Schaeffler Group Industrial TPI 205 63 Determining the thickness of the required shim After measuring the axial play, the shim thickness X can be finalized. The axial clearance of the bearing can be obtained by lifting the outer ring of the bearing and the surrounding structural members and measuring their movement. Determine the thickness of the gasket: Determine the preload: Required gasket thickness for X mm, Figure 4 Initial thickness of X1 mm gasket A mm Measured axial clearance V mm Preload FV kN Preload, Recommended value is 3.5% rating Dynamic load CCs kN0.926/mm axial elasticity coefficient, please refer to the dimension table. Figure 4 Bearing arrangement and gasket thickness X.