thin section bearing Install accuracy calibration method

After the angular contact ball bearing into the spindle, install precision calibration sequence is as follows (with shaft diameter of 60 100mm ordinary lathe for example):

(A) measuring the shaft and housing bore size, to determine with precision bearings, with the following requirements:

Take the inner ring and the shaft interference fit, crossed roller bearings‍ the amount of interference 0 ~ + 4μm (at light load, when precision is 0); take the outer ring and the bearing bore clearance fit, clearance volume 0 ~ + 6μm (but at the free end of the bearing when using angular contact ball bearings, but also increase the gap); shaft and housing bore surface roundness error in 2μm or less, face parallelism bearing spacer used in the 2μm or less, the end face of the shaft shoulder end foreign beating in 2μm or less; retaining shoulder of the housing bore axis beating 4μm below; cover the front end face of the spindle axis beating 4μm or less.

(2) a fixed end bearings mounted on the shaft before

After the bearings were cleaned thoroughly washed with clean kerosene, grease lubrication, the first containing 3% to 5% of the grease into the bearing organic solvents for degreasing and cleaning, and then quantitative grease gun oil filled bearing (accounting bearing space volume of 10% to 15%); heating bearings make heating 20 ~ 30 ℃, oil presses the bearing into the shaft; pressure in the tight sets with suitable pressure shaft and bearing high precision bearings‍ against the end face axially the spring balance tape volumes on the bearing outer ring, pre-load starting torque measuring method stipulated check whether a substantial change (even if the bearing is correct, but due to meet or maintain the deformed frame, pre-load there; positioning changes possible).

(3) the bearing shaft assembly into the seat hole

Heated seat hole so that heating 20 ~ 30 ℃, with continuous gentle pressure on the bearing shaft assembly into the housing bore;? Before adjusting cover, tighten the amount of the front cover of 0.02 ~ 0.05μm, to the outer end face of the bearing housing benchmark indicator of the conflict in the journal header surface, the axis of rotation measured beat, require error 10μm or less; will dial gauge positioned reali slim bearings‍ on the shaft hole in the surface of the back seat of the header conflict, the rotation axis to measure the bearing housing bore concentricity before.

(4) the free end of the bearing may be selectively placed in the position deviation offset mounted to the bearing support position, to offset possible concentricity and roundness deviation of the deviation between each other.‍

thin section bearing How to identify bearing

The packaging is clear double row tapered roller bearings under normal circumstances, the regular manufacturers brand has its own dedicated external packaging designers to design, production conditions and arrangements for clearance of the factory production of production, therefore, in terms of product triple row roller slewing bearing‍ packaging lines the color should be very clear and unambiguous.

Seal word is clear

Every product bearing products bearing the body will be in the printed word has its own brand, label and so on. Although the font is very small, but regular manufacturers of products using the stamp printing technology, but without the hot embossing process is carried out, so the font was small, but a deep depression, very clear. And under normal circumstances, not only fuzzy fonts counterfeit products, due to the rough printing technology, fonts floating on the surface, and some can be easily wiped off by hand or hand signs seriously.

Is there a hybrid ring

Left hand holding the bearing sleeve body, right hand toggle coat a small margin to rotate back and forth, listening to the bearings during operation if there is mixed response. Most counterfeit products due to production conditions of backwardness, completely hand-mill operation, bearing the body in the crossed roller bearings‍ production process will inevitably be braced with dust, sand a class of impurities, so that the rotation of the bearing ring or when there will be hybrid phenomenon does not run smoothly . This is to determine whether a product comes from a strict production standards, and the key with the regular operation of the machine manufacturer's brand products.

LYHY slewing ring bearings Chamfer is uniform

Are there traces of oil muddy surface which requires that we should pay special attention to when buying imported slewing ring ‍bearings. Very easy to leave a thick oil stains Because there is a certain gap between domestic and foreign advanced technology of rust country of manufacture, so the bearing body cross roller bearings‍ rust treatment, feeling sticky sticky thick hand contact when, while foreign original on imported bearings hardly see any signs of rust oil. According to insiders, particularly observant person can smell the bearings into a special flavor, which is anti-rust oil taste.

The so-called bearing chamfer, which is the junction of horizontal surface and vertical surface, counterfeit products bearing production technology due to restrictions in parts of the processing of these corners was unsatisfactory, which we can easily identify.

Bearing Package

Packaging fair share in the manufacturing of packaging and packaging bearing completed and after passing inspection, namely cleaning and anti-rust treatment, then put the package in order to achieve water, moisture, dust, shock, maintaining quality and precision bearings and the purpose of ease of use and sale.

Bearing inner packing by rust period is divided into triple row roller slewing bearing‍ three categories:

① Short rust on packaging: rust period of 3 to 6 months, for large volume shipments to the same subscriber, then put the bearing used in the short term. By mutual agreement, to facilitate the use of the principle, the use of simple packaging.

② general rust on the packaging: rust period of one year for general purpose bearing.

③ long rust-proof packaging: rust of two years for special and precision bearings.‍

slim ball bearing Angular contact ball bearing

Angular contact ball bearing is a bearing, it can support radial and axial loads. Able to work at higher speeds. The contact angle, the higher the axial load carrying capacity. High-precision and high-speed bearings usually take the contact angle of 15 degrees. In the axial force, the contact angle will increase. Angular contact ball bearings can support radial and axial loads. Able to work at higher speeds. The contact angle, the higher Thin section bearings‍ the axial load carrying capacity. High-precision and high-speed bearings usually take the contact angle of 15 degrees.

In the axial force, the contact angle will increase. Single row angular contact ball bearings can withstand axial load in one direction, while the radial load, will cause additional axial force. And the only limit axial displacement in one direction shaft or housing. If paired installation, so that one pair of bearing outer ring relative to that wide side face of wide and narrow side facing the narrow end. This can avoid additional axial force, and the shaft or housing to limit axial clearance within the range in both directions.

Angular contact ball bearing raceway for its inner and outer rings relative displacement on the horizontal axis, so it can support radial load and axial load - combined load mobile crane bearing‍ (single row angular contact ball bearings can withstand axial load in one direction, So often adopted installed in pairs).

Cage made ​​of brass, synthetic resins, etc., depending on the bearing forms, and application conditions.

Angular contact ball bearings: 7000C-type (α = 15 °), 7000AC type (α = 25 °) and 7000B (α = 40 °) of several types. This kind of bearing outer ring of locking in the general inner and outer rings can not be separated, can withstand radial and axial joint load and axial load in one direction. Axial load capacity from the contact angle, the contact angle is large, the ability to withstand high axial loads. This kind of bearing can limit the axial displacement in one direction shaft or housing.

The main purpose

Single row angular contact ball bearings: machine cross roller bearings‍ tool spindles, high frequency motors, gas turbines, centrifuges, small car front wheel, differential pinion shaft

Double row angular contact ball bearings: pump, blower, air compressor, various types of transmission, fuel injection pumps, printing machinery

Installation Tips

High-speed precision angular contact ball bearings, mainly used for high-speed rotating load lighter occasions, requiring high precision bearings, high speed, low vibration and low temperature rise certain life. Often high-speed spindle bearing installed in pairs, the inner surface grinder spindle speed key component parts.‍

thin section bearing bearing

High-speed precision angular contact ball bearing life of a great relationship with the installation, you should note the following

1 bearing should be installed in the clean, clean room, to carefully matching the bearing, the bearing spacer to be after grinding, while maintaining the inner and outer contour of the spacer premise spacer should be controlled in parallel 1um the following;

2 bearings should be cleaned before installing clean, cleaning the inner slope upward, feel should be flexible, no sense of stagnation, dry, placed in a specified amount of grease, oil mist lubrication should be placed in the case of a small amount of oil mist;

3 bearing installation tool should be used exclusively, even by force, is prohibited beat;

4 bearing store should be clean air, non-corrosive gases, relative humidity less than 65%, long-term storage should be regularly rust.

Maintenance 1, when the bearing to miniature linear bearings‍ run to a certain period of time (or Paul raised maintenance period), will be bearing all removed;

2, with a clean diesel or kerosene soaked with cleaning bearings, if technical conditions for the best open closures cleaning;

3, air dry after cleaning cleaning oil, visual inspection for damage;

4, with about a 150mm, angular contact ball bearing diameter equal to the inner diameter of the stick (preferably hollow tube), one end fixed to a bearing;

5, rapid rotation of the bearing by hand while the stick (wooden pipe) and the other end on top of the microphone audio amplifier or listening to the debate on the ear bearing crossed roller bearings‍ rotation noise;

6, horizontal toggle the fixed bearing sticks, check bearing wear loose;

7, loose serious, turn the noise is too large, there is a serious defect FAG bearings should be eliminated, replaced with the same model;

8, take a bucket of the appropriate amount of grease (high quality yellow dry oil) with gentle heat to melt (not hot), will detect over-bearing into the bucket to soak no bubbles overflow. Bearing grease to cool before removing residual grease less. After cooling remove grease angular contact ball bearings, grease residue quantity. Determine how many of the remaining amount of grease required.

9, with a soft cloth or tissue paper Thin section bearings‍ to wipe the outside of the bearing grease will FAG bearings fitted to the pulley undisturbed security, maintenance work is completed.

LYHY slewing ring bearings Angular contact ball bearings

Angular contact ball bearings: 7000C-type (α = 15 °), 7000AC type (α = 25 °) and 7000B (α = 40 °) of several types. This kind of bearing lock port on the outer ring, the inner and outer rings can not be separated in general, can withstand radial and axial joint load and axial load in one direction. Axial load capacity mobile crane bearing‍ from the contact angle, the contact angle is larger, the ability to withstand high axial loads. This kind of bearing can limit the axial displacement in one direction shaft or housing.

Higher speed limit contact ball bearings can support radial load and axial load can also be subject to pure axial load, axial load capacity by the contact angle and the contact angle increases with the increase.

Single row angular contact ball bearings

Single row angular contact ball bearings can withstand axial load in one direction, when the radial load, will cause additional axial force must be applied to the corresponding reverse load, miniature linear bearings‍ therefore, the kinds of bearings are generally used in pairs. Double row angular contact ball bearings can withstand greater radial load mainly radial and axial joint load and moment loads, it can limit the bi-axial displacement of shaft or housing.

slim ball bearing Angular contact ball bearings installed in pairs

Paired angular contact ball bearings can bear radial load mainly radial and axial joint load can also be subject to pure radial loads. Tandem configuration can only bear axial load in one direction, the other two configurations can withstand axial load in either direction. After installing preload interference, rings and balls in the axial pre-load condition, thereby enhancing the entire group as a single bearing support stiffness and rotational accuracy.

Back to back configuration, the post code Full complement cylindrical roller bearing‍ for the DB (eg 70000 / DB), back to back pairing separate line bearing load to the bearing axis. Can withstand the effect of axial load in both directions, but the load in each direction only by one bearing. Back to back mounted bearings provide a relatively high rigidity of the bearing arrangement, and can withstand the overturning moment.

Face configuration, the post code for the DF (eg 70000 / DF), paired face-load line bearing the confluence of the bearing axis. Can withstand the effect of axial load in both directions, but the load in each direction only by one bearing. This configuration is better paired back to back with high rigidity, and is not suitable to withstand the overturning moments. This configuration of the rigid and affordability overturning moment is better than DB configurations, bearings can withstand axial load;

Series configuration, post code for DT (eg 70000 / DT), when arranged in series, parallel to the load line, radial and axial loads evenly shared by the bearing. However, acting on the bearing set can only bear axial load in one direction. If the axial load acting on the opposite direction, or if there is a composite load, mobile crane bearing‍ it is necessary to increase a relatively tandem pair bearing adjustment third bearings. This configuration can also be a series of three or more bearings at the same support, but can only carry axial load in one direction. Generally, in order to balance, and to limit axial displacement of the shaft, to be installed at the other support in the other direction to withstand the axial load bearing.

thin section bearing Structural deformation types

Double row angular contact ball bearings can withstand the same time characterized by joint load radial and axial load, limiting the axial displacement of both axes. Compared with the two-way thrust ball bearings, these bearings speed limit is higher, the contact angle of 32 degrees, rigid, can withstand the high precision bearings‍ overturning moment, widely used in cars in the front wheel hub (some models also use the same size double row tapered roller bearings).

Structural deformation double row angular contact ball bearings, there are four:

Type A: 90mm outside diameter less than or equal to the standard design of the bearing. No ball gap, and therefore can withstand equal bi-axial load. Using lightweight glass fiber reinforced nylon 66 cage, bearing temperature rise is small.

Type A: 90mm outside diameter greater than the standard design of the bearing. Side of the ball gap, with z steel stamping cage or solid brass cage.

Type E: is to strengthen the structure, the side with filling slots that can hold more of the ball, so a higher carrying capacity.

Both sides with a dust cover type and sides Full complement cylindrical roller bearing‍ with a ring-type, A-type and E-type design design double row angular contact ball bearings with dust cover can be both sides of the (non-contact) or seals (contact). Sealed bearings are filled with a rust-proof lithium grease, generally between -30 degrees to 110 degrees operating temperature. Without re-lubrication during use, before installation is no longer heated.

LYHY slewing ring bearings Axial spherical roller bearings

Axial spherical roller bearings and spherical roller bearings Similarly, race raceway is consistent with the bearing center axis as the center point of the sphere, such as spherical roller bearing type, therefore, has a self-aligning feature of deflection and shaft concentricity less sensitive.

And sample other thrust bearing different single direction thrust ball bearing‍ type of bearing axial load capacity is very large, the axial load while also subject to certain radial load, but the radial load should not exceed 55% of the axial load.

As long as the load P and P0 does not exceed 0.05C0, and turn rotary axis, the bearings allow listed in the following table aligning angle.

Aligning bearing angular diameter series aligning bearing angular diameter series 200 Series 1 ° ~ 1.5 ° 300 Series 1.5 ° ~ 2 ° 400 Series 2 ° ~ 3 ° smaller value for larger bearings, and allows increased when the load aligning angle will decrease.

Generally use oil lubrication during use.

Thrust tapered roller bearings can withstand axial load, Thin section bearings‍ can limit the axial displacement of the bearing, it can be used as a one-way axial positioning. And thrust cylindrical roller bearings compared to the carrying capacity of a large, relatively small slide, but a lower speed limit.

slim ball bearing Bearing performance characteristics described

1, spherical roller bearing outer ring and housing bore bearings should not adopt an interference fit with the inner ring and the journal should not be too tight, requiring cross roller bearings‍ the use of the adjustment nut in the installation should be able to produce more flexible axial displacement. Spherical roller bearings because if the interference fit, easy to make changes in the contact angle of the bearing, resulting in uneven distribution of load bearing, causing a high temperature. Therefore, the installation with the kind of bearing outer ring and the journal and the bearing housing bore, the general should be able to thumb his hands just pushed into the journal and the bearing housing bore for the best.

2, for spherical roller bearings mounted axial agricultural bearings‍ clearance, the journal is available on the adjusting nut, washer and housing adjustment screw hole, or spring preload adjustment methods. The size of the axial clearance, and bearing installation layout, material from the bearing shaft and bearing between relevant, can be determined according to the working conditions. For high-load high speed spherical roller bearings, adjusting clearance, must consider the impact of temperature on the axial clearance, clearance will reduce the amount of the estimated temperature rise caused by account, that is, the axial travel to properly adjust the gap a little too big. For low speeds and withstand vibration bearings, no clearance should be taken to install, or preloaded installation. Its purpose is to make Spherical roller bearings and roller produce good contact load is evenly distributed, to prevent the rollers and raceways damaged by shock and vibration. high precision bearings‍ After adjustment, the size of the axial clearance with dial gauge test. The method is to first dial gauge fixed in the body or the bearing housing, so that the dial gauge against smooth contact surface of the shaft, the shaft axially pushed around, the maximum amount of the hands of the swing is the axial clearance values.

thin section bearing Tapered roller bearings

Tapered roller bearings mainly bear radial diameter, axial joint load. Load bearing capacity depends on the outer ring raceway angle, angle the greater carrying capacity. These bearings are separable bearings, according to the number of columns bearing rolling elements into single row, double row and mobile crane bearing‍ four row tapered roller bearings. Single row tapered roller bearing clearance to be user adjusted during installation; double row and four row tapered roller bearing clearance in the factory based on the given user requirements, users do not need to adjust.

Tapered roller bearings have tapered inner and outer ring raceways, tapered rollers are arranged between the two. All conical surface projection lines are a little get together with the bearing axis. This design makes tapered roller bearings particularly suitable for the accommodation of combined (radial and axial) loads. Most of axial load bearing capacity is determined by the contact angle α; greater the α angle, the higher the axial load capacity. crossed roller bearings‍ Angle size to calculate the coefficient e; e value, the greater the contact angle, the bearing axial load greater applicability.

Tapered roller bearings are usually separated type, that is with roller and cage assembly of components of the inner cone and cone outer (outer) installed separately.‍

LYHY slewing ring bearings Lubrication method

Bearing Maintenance: bearing cleaned up: Assembly nsk tapered roller bearings under the overhaul, the first recorded appearance of bearings, confirm the residual amount of lubricant, lubricant used after sampling review, wash bearings. The tapered roller bearings nsk full immersion is the slot machine lubricating bearings by shrouded brought up, and then back into the oil sump Gulu body should be slightly lower than the lowest place. cross roller bearings‍ Application of such a measure normally smooth grease -20 ~ 120 ℃, while on the positive is 150 ℃ low temperature applications arise from basic oil boiling too fast, run off and serious scenes, greatly extending the life bearing application number. As the clean up agent, generally use gasoline, kerosene. However, because the application of the mineral base oil, so that the kind of smooth and grease are being played on some biochemical indices close buckle rust and rust function outside. Non-break-type medium-sized ball bearings, the inner ring with one hand support level, wind around the outer ring to confirm whether smoothly. Because that kind smooth butter chosen delicate fiber, light melancholy filter to waste lithium thickener, application of mineral oil as the base oil, it is difficult to know the light outside the high-end bearing foot elevated vibration request. In order to Full complement cylindrical roller bearings‍ determine the assembly up nsk tapered roller bearings whether you can use to clean the bearing after being reviewed. Oil can be taken away due to repeated heat determine the bearing cool down, so this law applies to high speed bearing components. Law is suitable for high-speed, high-temperature lubrication of the bearing element. Piles of metal machine grid Xiaobian to introduce 1 bearings are bearing oil bath lubrication are the cause, the use of the amount of fat in the biggest kind of smooth high-speed wire rod roller bearings, accounting division with 70% fat content. With a high pressure oil pump through the nozzle onto the tapered roller bearings nsk, launched into the bearing oil flow into the tank through the other end of the bearing. 2 bath lubricated bearings drip lubricant bearing lubrication in general form, suitable for low speed bearing lubrication. Review raceway, Gulu surface, the surface morphology of cooperation, cage wear, the bearing clearance is added and there is a sense of proportion about the decline of precision damage, strange. Repeat 3 bearing lubrication Taper roller bearings‍ oil lubrication suitable for drip lubricant supply capacity was needed nsk tapered roller bearing elements, drip drop amount is generally advisable every 3-8 seconds, too much oil will cause the bearing to measure improved. Another benefit is a degree of non-inferior good pumping, either greasing machine still works fine greased are concise hard line. A bearing lubrication oil pump spray the filtered oil to the bearing element, after the nsk tapered roller bearing lubricant and then filtered using ice. 5 bearing spray lubrication expansion monotonous atmosphere confused by the formation of the lubricating oil mist sprayer, spray bearings, bearing cyclone may be invalid cool and prevent intrusion of impurities. Moreover, the smooth expensive grease can greatly increase profits nsk tapered roller bearings. When no difficulty on starting and running a positive momentum moment is -20 ℃ testing. When are bearing high-speed wind around Gulu body and cage also make progress commensurate with the high-shrouded atmosphere around the formation of cyclones, with the general form it is difficult to lubricate spherical roller bearing‍ the bearing lubricant sent, then you must use high-pressure jet spray lubricant in the form of to the bearing, the position of the nozzle should be placed is maintained between the inner ring and the place holder.

slim ball bearing Spherical roller bearings

Spherical roller bearings with two rollers, mainly bear radial load, but also can withstand axial load in either direction. A high radial load capacity, especially suitable for heavy work loads or vibration, but can not afford pure axial load. This kind of bearing outer ring raceway is spherical shape, so its mobile crane bearing‍ good self-aligning, can compensate concentricity error.

There are two symmetrical spherical roller, there is a common spherical outer ring raceway, and the bearing inner ring with two axis tilt angle of the raceway, aligning with good performance, when the axial force bent or install a different heart while still bearing the normal use, transfer concentric with the bearing size range varies, generally allowable aligning angle is 1 to 2.5 degrees, the larger the load bearing capacity of this type, in addition to radial loads outer bearing can withstand double-acting axial load, has good impact resistance, in general, spherical roller bearings allowed operating speed is low.

Spherical roller bearings under the roller-sectional shape into symmetrical spherical roller and spherical roller asymmetric shape of two different structures, high precision bearings‍ asymmetric spherical roller bearings are early products, the key is for the host service, new design when the host is rarely chosen symmetrical spherical roller bearings, internal structure has been completely improved design and parameter optimization, and early-aligning roller bearings produced compared to withstand greater axial loads, these bearings run lower temperature, it can be adapted to the requirements of high speed, according to the inner wall and used with or without a cage characteristics can be divided into two kinds of type C and CA, C-type bearing is no inner wall and the use of steel stamping cage, CA type bearing characteristics compared to both sides of the inner wall and the use of the car solid cage in order to improve the bearing lubrication, can provide users with an outer annular groove and three hole aligning roller bearings, with bearing post code / W33 said, can also be supplied with inner hole aligning roller bearings based on user requirements, in order to facilitate customer handling and replacement of bearings, but also provide the hole aligning tapered roller bearings, tapered bore, taper 1:12 later code-named K said that in order to meet specific user requirements are also available within 1:30 taper bearings, then set code for K30 tapered ferris wheel bearing‍ bore bearing locknuts are available directly mounted on the bearing cone journal, it can draw an adapter sleeve or withdrawal sleeve mounted on a cylindrical bearing journal. To ensure that the bearing at high speed centrifugal action to prevent harmful slip between the raceway and roller,