JP6483959B2 - Manufacturing method of bearing - Google Patents

Description

  The present invention relates to a manufacturing method and a manufacturing apparatus for a bearing, and more particularly to a manufacturing method and a manufacturing apparatus for a self-aligning roller bearing.

  Conventionally, a self-aligning roller bearing is known as one type of bearing. The self-aligning roller bearing is assembled manually. As the assembly method, for example, the following method is used. First, the rollers (rolling elements) are inserted by hand from the inside of each cage. The outer ring and the inner ring are combined before putting the last two rollers (four in total) in each cage. With the outer ring inclined with respect to the inner ring, the last four rollers are hammered into the cage from the outside. Thereafter, the inclination of the outer ring is returned by hand to complete the assembly of the bearing. The work of returning the inclination is called “kaeshi”.

  As described above, since the assembly of the self-aligning roller bearing is a manual and complicated process, automation of the assembly work has been proposed from the viewpoint of reducing the manufacturing cost (for example, JP-A-2006-336752). And Japanese Patent Application Laid-Open No. 2006-336751).

  Japanese Patent Application Laid-Open No. 2006-336752 proposes a method in which an outer ring is deformed into an oval shape with a jig and an inner ring roller assembly is inserted into the outer ring obliquely. Further, in Japanese Patent Laid-Open No. 2006-336751, the inner ring roller assembly is shaken while guiding the rollers of the inner ring roller assembly on the inner surface of the spherical recess using the pedestal on which the spherical recess is formed. It has been proposed to perform the maple work while moving it.

JP 2006-336752 A JP 2006-336751 A

  The above assembly work has the following problems. That is, in the barbing operation, the end surface of the roller located in the region separated from the outer ring in the inner ring roller assembly comes into contact with and interferes with the inner diameter side end of the outer ring. Therefore, manual adjustment is necessary to eliminate the interference, and it is difficult to automate the barbing work.

  Furthermore, in the above-described automation method, since the three steps of the assembly process with the inner ring place, the assembly process of the inner ring roller assembly and the outer ring, and the return process are performed using separate facilities, the facility for automation is used. There has been a problem that the cost is increased and the space required for the equipment is increased.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a bearing manufacturing method capable of automating the barbing work and saving space and cost. It is to provide a manufacturing apparatus.

A bearing manufacturing method according to an embodiment of the present invention includes the following steps. First, an inner ring roller assembly including an inner ring place and a cage for holding the roller, and an outer ring in which the inner ring roller assembly is inserted on the inner peripheral side, the central axis of the inner ring roller assembly is the central axis of the outer ring A step of preparing a bearing assembly that is inclined with respect to the surface is performed. Then, in the bearing assembly, while rotating at least one of the inner ring and the cage, the outer ring is moved relative to the inner ring roller assembly so that the direction of the center axis of the outer ring and the direction of the center axis of the inner ring coincide with each other. The process to make is performed. In the step of preparing the bearing assembly, the inner ring assembly including at least the inner ring and the cage is disposed on the inner peripheral side of the outer ring so that the central axis of the inner ring assembly is inclined with respect to the central axis of the outer ring. And a step of inserting the roller from the outer peripheral side of the cage into a pocket for holding the roller in the cage while the central axis of the inner ring assembly is inclined with respect to the central axis of the outer ring. In the inner ring assembly, the cage has a double row of the pockets capable of holding the rollers in a double row. In the step of disposing on the inner peripheral side of the outer ring, the central axis of the inner ring assembly is inclined with respect to the central axis of the outer ring so that a part of each row of the double row pockets is exposed. In the step of inserting the rollers, the rollers are inserted into each of the double row pockets.

  A bearing manufacturing apparatus according to an embodiment of the present invention includes a first holding part and a second holding part. The first holding portion holds an inner ring roller assembly including an inner ring portion and a cage that holds the roller. The second holding portion holds the outer ring in which the inner ring roller assembly is inserted on the inner peripheral side. The first holding part and the second holding part are relatively movable so that the central axis of the inner ring roller assembly is inclined with respect to the central axis of the outer ring. The first holding unit includes a drive unit that rotates at least one of the inner ring and the cage.

  According to the bearing manufacturing method and the manufacturing apparatus described above, it is possible to automate the barbing work and to save space and cost in the bearing manufacturing process.

It is a flowchart which shows the manufacturing method of the bearing which concerns on embodiment of this invention. It is a cross-sectional schematic diagram of the bearing manufactured using the manufacturing method shown in FIG. It is a cross-sectional schematic diagram of the manufacturing apparatus of the bearing used for the manufacturing method shown in FIG. It is a schematic diagram in order to demonstrate operation | movement of the manufacturing apparatus shown in FIG. It is a schematic diagram for demonstrating the manufacturing method of the bearing shown in FIG. It is a schematic diagram for demonstrating the manufacturing method of the bearing shown in FIG. It is a schematic diagram for demonstrating the manufacturing method of the bearing shown in FIG. It is a schematic diagram for demonstrating the manufacturing method of the bearing shown in FIG. It is a schematic diagram for demonstrating the manufacturing method of the bearing shown in FIG. It is a schematic diagram for demonstrating the manufacturing method of the bearing shown in FIG. It is a schematic diagram for demonstrating the manufacturing method of the bearing shown in FIG. It is a schematic diagram for demonstrating the manufacturing method of the bearing shown in FIG. It is a schematic diagram for demonstrating the modification of the manufacturing method of the bearing shown in FIG.

  Details of the embodiment of the present invention will be described below. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

<About manufacturing method>
With reference to FIG. 1 and FIG. 2, the manufacturing method of the bearing which concerns on this embodiment is demonstrated. The bearing manufacturing method shown in FIG. 1 can be applied to the bearing manufacturing method having the configuration shown in FIG. 2, for example.

  A bearing 1 shown in FIG. 2 is a self-aligning roller bearing, and includes an inner ring 2, a plurality of rollers 3 disposed on the outer peripheral surface (inner ring raceway surface 2 </ b> A) of the inner ring 2, and a first holding roller 3. 1 and 2nd cage | baskets 4A and 4B, and the outer ring | wheel 5 located in the outer peripheral side of the roller 3 are provided. An outer ring raceway surface 5 </ b> A that is a spherical concave surface is formed on the inner peripheral side of the outer ring 5. The roller 3 is in contact with the outer ring raceway surface 5A. The rollers 3 are arranged in a double row (two rows). The inner ring raceway surface 2A and the outer ring raceway surface 5A are spherical concave surfaces, and the side surfaces of the rollers 3 (surfaces in contact with the inner ring raceway surface 2A and the outer ring raceway surface 5A) are also curved (spherical).

  With reference to FIGS. 1-13, the manufacturing method of the bearing 1 is demonstrated. First, the preparation step (S10) shown in FIG. 1 is performed. Specifically, the inner ring 2, the roller 3, the cages 4A and 4B and the outer ring 5 constituting the bearing 1 shown in FIG. 2 are prepared, and an assembly is prepared by assembling these parts as follows. .

First, as shown in FIG. 3, a first retainer 4 </ b> A for holding a row of rollers is disposed on the inner peripheral side of the outer ring 5. Next, place the first retainer 4A the inner peripheral side from the first retainer 4 A pocket 6 variation in roller 3 as shown in FIG. Next, as shown in FIG. 5, the inner ring 2 is arranged on the inner peripheral side of the first cage 4A. As shown in FIG. 4, only the first retainer 4 </ b> A for retaining the rows 3 of rollers 3 and the rollers 3 retained by the first retainer 4 </ b> A are disposed on the inner peripheral side of the outer ring 5. Therefore, the inner ring 2 can be easily arranged on the inner peripheral side of the first cage 4A.

Next, an assembly comprising the inner ring 2, the first retainer 4A, the plurality of rollers 3 held in the pocket 6 of the first retainer 4A, and the outer ring 5 is formed in this embodiment as shown in FIG. It is mounted on the base member 11 of the manufacturing apparatus 10. Specifically, as shown in FIG. 12, the base member 11 includes a cage support portion 12 that supports the first cage 4 </ b> A from the lower side (end surface side), an inner peripheral side of the inner ring 2, and a part of the end surface. And an inner ring support part 13 for supporting the cage, and a base part 14 for supporting the cage support part 12 and the inner ring support part 13. The base portion 14 and the inner ring support portion 13 may be disposed so as to be relatively rotatable via a bearing 15 (see FIG. 13), for example.

  Next, as shown in FIG. 7, the second cage 4B is arranged on the outer peripheral side of the inner ring 2 so as to be adjacent to the first cage 4A.

  Next, the holding member 21 (see FIG. 8) is brought into contact with the end surface of the second cage 4B from the upper side of the second cage 4B. The holding member 21 is movable relative to the base member 11 in the direction indicated by the arrow 22 as shown in FIG. Such movement of the base member 11 can be realized by any conventionally known drive member such as an electric conductor or a hydraulic cylinder. As a result, the first and second cages 4 </ b> A and 4 </ b> B are sandwiched between the cage support portion 12 and the holding member 21 of the base member 11.

  And the outer ring | wheel 5 is fixed with the clamp member 31 (refer FIG. 8) from the outer peripheral side. The clamp member 31 is movable in the direction indicated by the arrow 34 in FIG. 12 and is rotatable in the direction indicated by the arrow 33. Such an operation of the clamp member 31 can be realized by a drive member 35 such as a hydraulic cylinder or an electric conductor. By rotating the clamp member 31 in the direction indicated by the arrow 32 in FIG. 8, the outer ring 5 is inclined with respect to the inner ring 2 and the first and second cages 4A and 4B. In this way, the outer ring tilting step (S20) shown in FIG. 1 is performed.

  When the outer ring 5 is inclined, it is preferable to rotate at least the first retainer 4A by rotating the base member 11 in the direction indicated by the arrow 15. In this way, in the operation of inclining the outer ring 5, the contact portion between the roller 3 and the outer ring 5 vibrates due to the vibration accompanying the rotation operation of the first cage 4A, and the operation of inclining the outer ring 5 is smoothly performed. It can be carried out.

  Here, the angle at which the outer ring 5 is inclined may be such that a portion of the pockets of the second cage 4B is exposed as shown in FIG. 8, but as shown in FIG. On the other hand, the inclination angle of the outer ring 5 with respect to the inner ring 2 may be relatively increased so that both pockets of the first and second cages 4A and 4B are exposed. Thus, the inclination angle of the outer ring 5 with respect to the inner ring 2 can be arbitrarily set.

  Next, the roller press-fitting step (S30) shown in FIG. 1 is performed. Specifically, as shown in FIG. 9, the roller 3 is indicated by an arrow 42 from the outer peripheral side of the second cage 4 </ b> B in the pocket 41 of the second cage 4 </ b> B exposed by inclining the outer ring 5. Press fit into. At this time, an arbitrary method can be used as a method for press-fitting the roller 3.

  Then, after the roller 3 is press-fitted into one pocket 41, the base member 11 is rotated as indicated by the arrow 43 to rotate the first and second cages 4A and 4B, and the rollers as described above. The other pockets 3 adjacent to the press-fitted pocket 41 and not yet fitted with a roller are exposed. Then, the roller 3 is press-fitted into the other pocket. By repeating this process of press-fitting the roller 3, rotation of the base member 11 (first and second cages 4A and 4B), and press-fitting the roller 3, the rollers are inserted into all the pockets 41 of the second cage 4B. 3 is arranged.

  Thereafter, the barbing step (S40) shown in FIG. 1 is performed. Specifically, by rotating the clamp member 31 in the direction shown by the arrow 34 in FIG. 10 while rotating the base member 11 in the direction of the arrow 45 (see FIG. 10), the central axis of the outer ring 5 and the inner ring 2 are rotated. The outer ring 5 is rotated so that the central axis is substantially in the same direction. In this way, at least the first cage 4A is rotated by the rotation of the base member 11, and vibration due to the rotation operation is generated. When the end surface of the roller 3 and the end surface of the outer ring 5 come into contact with each other in the above-described changing step, the interference between the roller 3 and the outer ring 5 at the contact portion is mitigated / resolved by the vibration. Therefore, the roller 3 can be smoothly and smoothly entered into the inner peripheral side of the outer ring 5. As a result, the above-described changing step (S40), which is a step of making the relative positional relationship between the outer ring 5 and the inner ring 2 usable as a bearing, as shown in FIG. 10, without requiring manual operations such as fine adjustment. ) Can be automated.

  In addition, although the 1st holder | retainer 4A is rotating in the process mentioned above, you may rotate the inner ring | wheel 2 instead of the 1st holder | retainer 4A in this process. Alternatively, the first holder 4A and the second holder 4B may be rotated together. Alternatively, the first cage 4A and the inner ring 2 may be rotated together. Further, the second cage 4B may be rotated simultaneously with the first cage 4A and the inner ring 2.

In the manufacturing method described above, press-fitting the second retainer 4B variation in roller 3 held in the manufacturing apparatus 10, but for the first retainer 4 A were arranged 3 days in advance from the inner peripheral side In place of the process shown in FIG. 9, as shown in FIG. 11, the rollers 3 may be press-fitted from the outer peripheral side into each of the first and second cages 4A and 4B held in the manufacturing apparatus 10. . In this case, the process shown in FIG. 4 is not performed, and the rollers 3 are not arranged in the assembly mounted on the base member 11, and all the rollers are used in the roller press-fitting process (S30) shown in FIG. 3 is press-fitted into the first and second cages 4A and 4B from the outer peripheral side.

<About manufacturing equipment>
The manufacturing apparatus 10 used for the bearing manufacturing method described above mainly includes a base member 11, a holding member 21, and a clamp member 31, as shown in FIG. The base member 11 includes a retainer support portion 12 that supports the first retainer 4A from the lower side (end surface side), an inner ring support portion 13 that supports a part of the inner peripheral side and the end surface of the inner ring 2, and these holding members. And a base 14 for supporting the vessel support 12 and the inner ring support 13. The base member 11 is rotatable as shown in FIGS. The holding member 21 may be disposed so as to face the cage support portion 12 of the base member 11 and may be movable in a direction indicated by an arrow 22 in FIG.

  Moreover, the clamp member 31 is arrange | positioned so that the area | region (area | region where the inner ring | wheel 2 and the outer ring | wheel 5 are arrange | positioned) located between the base member 11 and the control member 21 may be pinched | interposed from an outer peripheral side. Specifically, the clamp member 31 is preferably disposed on a surface perpendicular to the direction from the base member 11 toward the holding member 21. The clamp member 31 fixes the outer ring 5 from the outer peripheral side. The clamp member 31 is movable so that the outer ring 5 is inclined with respect to the inner ring 2. For example, the drive member 35 shown in FIG. 12 may be connected to the clamp member 31 so as to move the clamp member 31 in the directions indicated by the arrows 34 and 33.

  By using such a manufacturing apparatus 10, as shown in FIGS. 6 to 11, the outer ring tilting process (S20) to the burr process (S40) can be continuously performed on the assembly mounted on the manufacturing apparatus 10. For this reason, compared with the case where a separate installation is used in order to implement each process mentioned above, the space saving and cost reduction of a manufacturing installation can be achieved.

  Here, although there is a part which overlaps with embodiment mentioned above, the characteristic structure of this invention is enumerated.

  A bearing manufacturing method according to an embodiment of the present invention includes the following steps. First, an inner ring roller assembly including an inner ring 2 and a retainer 3 (first and second retainers 4A and 4B) for holding the roller 3, and an outer ring in which the inner ring roller assembly is inserted on the inner peripheral side. 5 and a bearing assembly in which the central axis of the inner ring roller assembly is inclined with respect to the central axis of the outer ring 5 (the state shown in FIGS. 8 and 9) (the inner ring 2 and rollers shown in FIG. 9). 3, a bearing assembly comprising first and second cages 4A, 4B and an outer ring 5, all the rollers 3 being press-fitted into the pockets of the cage, and the outer ring 5 being inclined with respect to the inner ring 2 The step (preparation step (S10), outer ring inclination step (S20) and roller press-fitting step (S30)) of FIG. In the bearing assembly, while rotating at least one of the inner ring 2 and the cage (first or second cage 4A, 4B), the direction of the central axis of the outer ring 5 and the direction of the central axis of the inner ring 2 The step of moving the inner ring roller assembly so as to match (the step of folding (S40)) is performed.

  In this way, in the step (S40) of moving the inner ring roller assembly on the inner peripheral side of the outer ring 5 so that the direction of the center axis of the outer ring 5 and the direction of the center axis of the inner ring 2 coincide, Since at least one of the cage and at least one of the cages (at least the first cage 4A in FIG. 10) is in a rotated state, the inner ring roller assembly and the outer ring 5 vibrate due to the rotation during the barbing step (S40). To do. Due to this vibration, the positional relationship of the contact portion (interference portion) between the end face of the roller 3 and the outer ring 5 varies during the changing step (S40), and the interference can be eliminated. That is, even when the end face of any one of the rollers 3 comes into contact with the end face on the inner peripheral side of the outer ring 5 during the barbing process, the contact state is immediately eliminated by the vibration. For this reason, the roller 3 of the inner ring roller assembly can easily enter the inner peripheral side of the outer ring 5. As a result, the maple process (S40) can be automated without requiring manual correction.

  In the bearing manufacturing method, the step of preparing the bearing assembly includes an inner ring assembly (an inner ring 2 shown in FIG. 8) including at least the inner ring 2 and a cage (first and second cages 4A and 4B). The inner ring assembly including the first and second cages 4A and 4B and the rollers 3 press-fitted into the pockets of the first cage 4A) is inclined with respect to the central axis of the outer ring 5 In the state where the outer ring is arranged on the inner peripheral side of the outer ring (outer ring inclination step (S20) shown in FIG. 8) and the central axis of the inner ring assembly is inclined with respect to the central axis of the outer ring 5, The roller 3 is inserted into the pocket 41 for holding the roller 3 in the cage (at least one of the first cage 4A and the second cage 4B) from the outer peripheral side of the cage (second cage 4B). And a step of inserting (roller press-fitting step (S30)). . In the step of inserting the roller (S30), by rotating the cage, other pockets into which the roller 3 is not inserted may be exposed, and the roller may be inserted sequentially.

  In this case, before carrying out the barbing step (S40), the rollers can be inserted into the pocket 41 of the cage from the outer peripheral side with respect to the inner ring assembly arranged on the inner peripheral side of the outer ring 5. Therefore, the step of inserting the rollers (S30) and the above-described return step (S40) can be performed continuously (for example, using the same manufacturing apparatus 10).

  In the above bearing manufacturing method, the step of preparing the bearing assembly is performed by inserting a part of the roller 3 in advance from the inner peripheral side of the cage into the pocket of the cage (first cage 4A) as shown in FIG. After that, by assembling the cage (first and second cages 4A and 4B) and the inner ring 2, an inner ring assembly (as shown in FIG. A step of preparing the first and second cages 4A and 4B and an assembly including the rollers 3 disposed in the pockets of the first cage 4A may be included.

  In this case, some of the rollers 3 are set in the inner ring assembly in advance, and the cage (second second) is arranged from the outer peripheral side as shown in FIG. 9 with respect to the inner ring assembly arranged on the inner peripheral side of the outer ring 5. Since the remaining rollers are inserted into the pockets 41 of the retainer 4B), the outer peripheral side is compared with the case where the rollers 3 are press-fitted into the entire pockets of the first and second retainers 4A and 4B from the outer peripheral side. The time required for the insertion process of the empty roller 3 can be shortened. A method of setting a part of the rollers 3 in the inner ring assembly in advance is a method that can be carried out relatively easily and in a short time, for example, by manually inserting the rollers 3 into the pocket from the inner peripheral side of the first retainer 4A. Can be used. Therefore, the time required for the manufacturing process of the bearing can be shortened as compared with the case where all the rollers are inserted into the pocket from the outer peripheral side.

  In the above bearing manufacturing method, in the inner ring assembly, the cage (first and second cages 4A and 4B) may have double row pockets capable of holding the rollers 3 in double row. Good. In the step of disposing the outer ring 5 on the inner peripheral side, the central axis of the inner ring assembly is inclined with respect to the central axis of the outer ring 5 so that a part of each row of the double row pockets is exposed. May be. In the step of inserting rollers (S30), the rollers 3 may be inserted into each of the double row pockets as shown in FIG.

  In this case, in the step of inserting rollers (S30), the rollers 3 can be inserted into all the double-row pockets. Therefore, if the step of inserting the rollers (S30) is automated, all the rollers 3 are inserted. Can be automated.

  A bearing manufacturing apparatus 10 according to an embodiment of the present invention includes a first holding part (base member 11 and a holding member 21) and a second holding part (clamp member 31). The first holding part holds an inner ring roller assembly (an assembly shown in FIG. 7) including the inner ring 2 and 3 and a holder (first and second holders 4A and 4B) for holding the roller. The second holding portion holds the outer ring 5 in which the inner ring roller assembly is inserted on the inner peripheral side. The first holding portion and the second holding portion are relatively movable so that the central axis of the inner ring roller assembly is inclined with respect to the central axis of the outer ring 5 as indicated by an arrow 33 in FIG. It has become. The first holding unit includes a drive unit that rotates at least one of the inner ring 2 and the cage (first and second cages 4A and 4B) (a drive unit that rotationally drives the cage support unit 12).

  In this way, since the so-called wrapping process (S40) can be performed while rotating at least one of the inner ring 2 and the cage, one of the above-described present invention can be achieved by using the manufacturing apparatus 10. The manufacturing method of the bearing which concerns on embodiment can be implemented easily.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the embodiments and experimental examples described above but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

  The present invention can be applied particularly advantageously to the manufacture of spherical roller bearings.

  1,15 Bearing, 2 Inner ring, 2A Inner ring raceway surface, 3 Rollers, 4A First cage, 4B Second cage, 5 Outer ring, 5A Outer raceway surface, 6,41 Pocket, 10 Manufacturing device, 11 Base member , 12 Cage support part, 13 Inner ring support part, 14 Base part, 15, 22, 32, 33, 34, 42, 43, 45 Arrow, 21 Holding member, 31 Clamp member, 35 Drive member.

Claims (3)

An inner ring roller assembly including an inner ring place and a retainer for holding the roller; and an outer ring in which the inner ring roller assembly is inserted on the inner peripheral side, and a central axis of the inner ring roller assembly is a central axis of the outer ring Preparing a bearing assembly that is inclined relative to
In the bearing assembly, while rotating at least one of the inner ring and the cage, the outer ring is assembled to the inner ring roller assembly so that the direction of the central axis of the outer ring and the direction of the central axis of the inner ring coincide with each other. A step of moving relative to the solid,
Preparing the bearing assembly comprises:
Disposing an inner ring assembly including at least the inner ring and the cage on an inner peripheral side of the outer ring so that a central axis of the inner ring assembly is inclined with respect to a central axis of the outer ring;
Inserting the rollers from the outer peripheral side of the retainer into a pocket for retaining the rollers in the retainer in a state where the center shaft of the inner ring assembly is inclined with respect to the center axis of the outer ring. ,
In the inner ring assembly, the retainer has the double row pockets capable of holding the rollers in double row,
In the step of disposing on the inner peripheral side of the outer ring, the central axis of the inner ring assembly is the center of the outer ring so that a part of one row of the pockets of the double row is exposed on one end face of the outer ring. It is in a state inclined with respect to the axis,
The method of manufacturing a bearing, wherein in the step of inserting the roller, the roller is inserted into each of the pockets of the double row. Preparing the bearing assembly comprises:
The method includes the step of preparing the inner ring assembly by assembling the cage and the inner ring after a part of the roller is inserted in advance from the inner peripheral side of the cage into the pocket of the cage. A method for manufacturing the bearing according to claim 1. An inner ring roller assembly including an inner ring place and a retainer for holding the roller; and an outer ring in which the inner ring roller assembly is inserted on the inner peripheral side, and a central axis of the inner ring roller assembly is a central axis of the outer ring Preparing a bearing assembly that is inclined relative to
In the bearing assembly, while rotating at least one of the inner ring and the cage, the outer ring is assembled to the inner ring roller assembly so that the direction of the central axis of the outer ring and the direction of the central axis of the inner ring coincide with each other. A step of moving relative to the solid,
Preparing the bearing assembly comprises:
Disposing an inner ring assembly including at least the inner ring and the cage on an inner peripheral side of the outer ring so that a central axis of the inner ring assembly is inclined with respect to a central axis of the outer ring;
Inserting the rollers from the outer peripheral side of the retainer into a pocket for retaining the rollers in the retainer in a state where the center shaft of the inner ring assembly is inclined with respect to the center axis of the outer ring. ,
In the inner ring assembly, the retainer has the double row pockets capable of holding the rollers in double row,
In the step of disposing on the inner peripheral side of the outer ring, the central axis of the inner ring assembly is inclined with respect to the central axis of the outer ring so that a part of each row of the pockets of the double row is exposed. And
In the step of inserting the roller, the roller is inserted into each of the pockets of the double row,
Placing the inner peripheral side of the outer ring, the step of inserting the rollers, and the mobile is to process, the inner ring and the cage is supported by the base member, the manufacturing method of the bearings.

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