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Common terms and definitions for rolling bearings (2)
Source: Bearing network time: 2018-05-14
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1. Bearing axis
The theoretical axis of rotation of the rolling bearing; the radial bearing, ie the inner ring axis; the thrust bearing, the shaft axis.
2. Inner ring (shaft) inner ring (shaft washer) axis
The inner cylinder of the inner ring (shaft ring) or the inner cylinder of the conical hole or the axis of the inscribed cone.
3. Outer ring (housing) outer ring (housing washer)axis
If the outer and outer surfaces of the outer ring are cylindrical; the axis of the outer cylinder of the outer and outer surfaces is the outer axis of the outer ring; if the outer surface is spherical, the outer surface of the outer ring is circumscribed; The line on the reference end face of the outer ring; the axis of the outer ring.
4. Conical inner ring (outer ring) axis line cone (cup) axis
The axial line of the inner ring (outer ring) of tapered roller bearings.
5. Radial plane
a plane perpendicular to the axis of the axis; a plane parallel to the tangent plane of the ferrule reference end face or the opposite side of the washer; can be considered to be a radial plane.
6. Radial radial direction
The direction of the axis through the axis in the radial plane.
7. Axial plane
The plane that accommodates the axis of the shaft.
8. Axial axial direction
Parallel to the direction of the bearing axis, straight to the tangent plane of the ferrule reference end or the opposite side of the washer; can be considered to be axial.
9. Radial (axial) distance
The interval measured in the radial direction (axial direction).
10. Touch angle (nominal touch angle) contace angle (nominal contact angle)
The angle between the plane (radial plane) that is straight to the bearing axis and the resultant effect line (nominal effect line) that is transmitted to the roll through the bearing ring or washer.
11. Nominal touch point
When the bearing parts are in normal relative orientation; the points of the rolling body and the raceway are touched.
12. Ferrule (washer) reference end face reference face of a ring (a washer)
The bearing manufacturer specifies the end face of the ferrule (gasket) as the reference surface; it can be used as a reference for measurement.
(3) Appearance scale
1. Boundary dimension
A measure that limits the shape of a bearing; the fundamental dimensions are the inner diameter, outer diameter, width (or height), and chamfer dimensions.
2. Bearing inner diameter
The inner diameter of the inner ring of the radial bearing or the inner diameter of the axial ring of the thrust bearing.
3. Bearing outer diameter bearing outside diameter
The outer diameter of the outer ring of the radial bearing or the outer diameter of the thrust bearing.
4. Bearing width bearing width
The axial spacing between the end faces of the two ferrules that limit the width of the radial bearing; the single row tapered roller bearing refers to the axial spacing between the opposite side of the outer ring and the opposite side of the inner ring.
5. Bearing height
The axial spacing between the opposite sides of the two washers that limit the height of the thrust bearing.
6. Ferrule (washer) chamfering scale ring (washer) chamfer dimension
The ferrule (washer) has a chamfered appearance that extends somewhat in the radial or axial direction.
7. Radial chamfer dimension
The ferrule or washer is envisioned from the sharp corner to the gap between the end face of the ferrule or washer and the intersection of the chamfer.
8. Axial chamfer dimension
The ferrule or washer is conceived from the sharp corner to the inner hole of the ferrule or washer or the space between the outer and outer surfaces and the chamfered surface.
9. Flange width
The spacing between the ends of the flange.
10. Flange height
The radial dimension of the flange. The height of the outer flange is the radial spacing between the outer surface of the flange and the outer surface of the outer ring.
11. Stop ring groove diameter
The diameter of the cylindrical outer surface of the stop ring groove
12. Stop ring groove width
The axial spacing between the ends of the ring groove.
13. Stop ring groove depth
The radial spacing between the cylindrical outer surface of the ring groove and the outer cylindrical outer surface.
14. Alignment surface radius
The radius of curvature of the spherical outer surface of the self-aligning seat, the self-aligning seat ring, the self-aligning outer ring or the outer outer ring.
15. Spherning surface centre height
The axial spacing between the curvature of the spherical reverse side of the spherical bearing of the thrust bearing and the opposite side of the opposite collar.
(4) Dimensions of parts and parts
1. Ball diameter
The spacing between two parallel planes that are tangent to the outer surface of the sphere.
2. Roller diameter
In the plane straight to the axis of the roller axis (radial plane); the interval between two tangent lines that are tangent to the outer surface of the roller. When calculating the extra load; use the radial plane in the middle of the roller.
3. Roller length
The spacing between the two radial planes including the end of the roller. However, the "roller length" used in accounting for additional loads is the theoretical maximum touch length of the roller and raceway at the shortest touch.
4. Pitch diameter of ball set
The diameter of a circle consisting of the center of a ball in a bearing.
5. Pitch diameter of roller set
The middle of a row of rollers in the bearing, the diameter of the circle running through the axis of the roller shaft.
6. Ball set bore diameter (outside diameter)
The diameter of the inner (external) cylinder of a row of balls in the bearing.
7. Roller set inner diameter (outer diameter) roller set bore diameter (outside diameter)
Radial touch roller bearing; diameter of an inscribed (external) cylinder of a row of rollers.
8. Ball complement bore diameter (outside diameter)
The diameter of the inscribed (external) cylinder of all the balls in the radial ball bearing.
9. Roller overall diameter (outer diameter) roller complemert bore diameter (outside diameter)
Radial touch roller bearing; the diameter of the inner (external) cylinder of all rollers.
Fives. Scale related to public service
1. Nominal inner diameter (outer diameter)
The diameter of the cylinder of the theoretical cylindrical outer hole (cylindrical outer and outer surface). The diameter of the cone in a specified radial plane; the outer diameter of the cone of the outer surface of the envelope. The theoretical appearance of the envelope of the outer spherical shape Spherical diameter.
Note: Regarding the nominal outer diameter of the nominal diameter of the rolling bearing; it is usually the reference value for the error between the inner hole and the outer surface.
2. Ferrule nominal width nominal ring width
The spacing between the two theoretical end faces of the bearing ring. It is usually the reference value (fundamental scale) of the practice width error.
3. Bearing nominal width (bearing height) nominal bearing width (bearing height)
The spacing between the two theoretical end faces of the ferrule (the opposite side of the washer); used to limit the width of the radial bearing (thrust bearing height). Usually the reference value of the bearing practice width or bearing practice height error (fundamental scale).
4. Bearing practice width
The spacing between the axial line of the radial bearing and the intersection of the two tangent planes of the ferrule practice end face that limits the bearing width. Limit the bearing width with the inner ring end face and the outer ring end face.
Note: For single-row tapered roller bearings; the spacing between the bearing axis and the intersection of the two planes: one plane is the plane tangent to the opposite side of the inner ring practice; the other is the plane tangent to the opposite side of the outer ring practice. At the moment, the inner and outer ring raceways and the inner side of the inner ring are in contact with all the rollers.
5. Bearing practice height
The axial distance between the axial line of the thrust bearing and the washer that limits the height of the bearing.
6. Bearing practice height error deviation of the actual bearing height
The difference between the practice height of the thrust bearing and the nominal height.
7. Nominal chamfer dimension
The chamfer scale as a reference.
8. Radial single chamfer dimension
In a single axial plane; the cusp or washer is envisioned from the sharp corner to the intersection between the chamfered outer surface and the ferrule or washer end face intersection.
9. Axial single chamfer dimension
In a single axial plane; the cusp or washer is conceived from the sharp corner to the intersection between the chamfered outer surface and the inner hole of the ferrule or washer or the intersection of the outer surface of the V-belt.
10. Largest permissible single chamfer dimension
The maximum radial or axial single chamfer dimension of the promise.
11. Nominal ball diameter
Usually used to identify the diameter of the ball scale.
12. Single diameter of a ball
The spacing between two parallel planes that are tangent to the actual appearance of the ball.
13. Mean diameter of a ball
The arithmetic mean of the maximum and minimum single diameter of the ball.
14. Ball diameter variation
The difference between the maximum and minimum single diameter of the ball.
15. Ball lot
Assume a certain number of balls with the same conditions; and be considered a whole.
16. Ball grade
The specific combination of the scale, shape, appearance roughness and gauge difference of the ball.
17. Ball gauge
A small difference between the uniform diameter of the ball and the nominal diameter of the ball; this amount is an amount in a series that has been determined.
18. Ball subgauge
The amount of the set of series that is the closest to the ball gauge value of the ball.
19. Roller nominal diameter of diameter roller
Usually used to identify the diameter of the diameter of the roller.
Regarding symmetrical rollers; refers to the theoretical diameter in the radial plane passing through the middle of the length of the roller; the largest theoretical diameter for the asymmetric roller (ie, the radial plane including the concealed sharp corner of the large end of the tapered roller) Inside).
20. Single diameter of a roller
The spacing between two straight lines that are tangent and parallel to the actual surface of the roller in a plane (radial plane) that is straight to the axis of the roller.
twenty one. Roller nominal length nomnial length of a roller
Usually used to identify the length of the roller length.
twenty two. Roller practice length actual length of a roller
The interval between two radial planes that just includes the end of the roller practice.
twenty three. Roller gauge
In the same radial plane of the rule; the uniform diameter of the roller is uniform against the diameter error of the upper and lower errors of the nominal diameter of the roller. For a cylindrical roller and a needle, the plane passes through the middle of its length.
twenty four. Roller grade
Roller diameter and shape specific combination of public service.
25. Roundness deviation from circular from
The minimum radial separation between the two concentric circles of the summed up; the roundness error.
26. Cylindricity error deviation from cylindrical form
The minimum radial spacing between the two coaxial cylinders being measured; the cylindricity error.
27. Spherical error (basic spherical appearance) deviation from spherical form
Summarize the outer (or inner and outer) inner spheres or the outer spheres that surround the general appearance (outer and outer surfaces) and the maximum radial spacing between the outward and the embarrassing planes on the general appearance.
28. Radial runout of the inner ring of a complete set of bearings (radial bearings)
When the inner ring is in a different angular orientation; the difference between the maximum and minimum radial spacing between the outer hole outer surface and a fixed point relative to the outer ring. The angular orientation at the above point or the tumbling body at the two ends adjacent thereto should be , the outer ring raceway or the inner ring reverse rib (tapered roller bearing) inner surface touch; that is, the bearing parts are in normal relative orientation.
29. Radial runout of the outer ring of a complete set of bearings (radial bearings)
When the outer ring is in a different angular orientation; the difference between the outer diameter of the outer diameter and the maximum and minimum radial spacing between the fixed points of the outer ring. The angular orientation at the above point or the roll body adjacent to both ends should be internal, The outer ring raceway or the inner ring reverse rib (tapered roller bearing) touches the inner surface; that is, the bearing parts are in normal relative orientation.
30. Radial clearance (bearings that can accept pure radial loads; non-preloaded conditions) radial internal clearance
When there is no external load effect; in a different viewpoint direction; one ferrule is related to the other ferrule; the arithmetic uniform value of the radial interval from a radial misalignment limit displacement to the opposite extreme orientation. This uniform value includes The amount of mutual displacement of the ferrule or washer in different angular orientations and the amount of displacement of the ferrule or washer when the tumbling set has a different angular orientation.
31. Theoretical radial clearance (radial touch bearing)
The outer ring raceway touch diameter minus the inner ring raceway touch diameter minus the double roll body diameter.
32. Axial clearance (bearings capable of accepting axial loads in both directions; non-preloaded condition) axial internal clearance
When there is no external load effect; one ferrule or washer is related to the arithmetic mean of the axial spacing of the other ferrule or washer from an axial limit displacement to the opposite extreme orientation. This uniform value contains the ferrule or washer at The amount of mutual displacement in different angular orientations and the amount of displacement of the ferrule or washer when the roll group is in a different angular orientation.
six. Torque, load and life
1. Starting torque
The torque required to rotate a bearing ring or washer relative to the opening of another fixed ferrule or washer.
2. Rotational torque
When a bearing ring or washer rotates; the torque required to block the movement of the other ring or washer.
3. Radial load
The effect is the load in the direction of the axial direction of the straight bearing.
4. Axial load
The effect is the load in the direction of the axis of the parallel bearing shaft.
5. Static load
When the relative rotational speed of the bearing ring or washer is zero (central or thrust bearing) or when the rolling element does not move in the direction of rolling (linear bearing); the effect on the bearing.
6. Dynamic load
When the bearing ring or washer is relatively rotated (central or thrust bearing) or when the tumble element is moving in the direction of rolling (linear bearing); the effect on the bearing.
7. Equivalent load
The general term used to calculate theoretical load; in certain situations; the bearing seems to accept the practical load under the theoretical load effect.
8. Radial (axial) fundamental static static (axial) load rating
Radial static load (intermediate axial static load) corresponding to the total eternal deformation of the roll and raceway. If it is at zero load; the roller and raceway (roller bearing) are or assumed to be normal busbars (full line When touched; under the maximum touch stress; the total eternal deformation occurring at the roll and raceway touch is 0. 0001 times the diameter of the roll body. For single row angular touch bearings; the radial extra load is such that the bearing rings are opposite each other. The radial weight of the load with pure radial displacement.
9. Radial (axial) fundamental dynamic load (axial) load rating
Stable radial load (stable intermediate axial load); under this load; the rolling bearing can theoretically saturate the fundamental extra life of 1 million rpm. For single-row angular touch bearings; the radial additional load is the resulting bearing sleeve The weight of the load relative to each other with a pure radial displacement.
10. Life (refers to a set of bearings) life
A ferrule or a washer or a tumbling material of the bearing is initially exposed to fatigue before expansion; a ferrule or a washer is related to the number of revolutions of the other ferrule or a washer. The life is also available at a given steady speed. Working hours to indicate.
11. Reliability (referring to bearing life) reliability
A group of nearly identical rolling bearings operating under the same conditions. The percentage of bearings that wish to reach or exceed a certain number of lifespans. The reliability of a set of bearings is the probability that the bearing will reach or exceed the ruled life.
12. Extra life rating life
The guess value of the lifespan based on the radial fundamental extra dynamic load or the axial fundamental extra dynamic load.
13. Basic extra life
Additional lifespan associated with 90% reliability.
14. Life factor
In order to obtain a fundamental additional radial dynamic load or a fundamental additional axial dynamic load corresponding to a given extra life; a correction factor applicable to the equivalent dynamic load.
15. Bearing block plummer block
A combination of a radial bearing and a seat; a support plate on the support surface parallel to the bearing axis.
16. Vertical block plummer block housing
Mount the bearing for the rolling bearing.
17. Flanged housing
a seat having a radial flange and a screw hole for the device on the outer surface of the support shaft.
18. Adapter sleeve
An axially open sleeve having a cylindrical bore; the outer surface is conical and has a small end with an external thread. For use with a tapered bore bearing assembly (with lock nut and lock washer) On the axis of the appearance.
19. Withdrawal sleeve withdrawal sleeve
a sleeve having a cylindrical inner bore axially open; the outer outer surface is conical and the outer end is externally threaded. For mounting the tapered bearing on the shaft of the outer cylindrical outer surface (with a nut).
20. Lock nut locknut
Screw nut with cylindrical outer surface and axial groove; lock the nut with an outer claw of the lock washer and the annular wrench. It is used for axial positioning of the rolling bearing.
twenty one. Lock washer lockwasher
A thin steel plate washer with many external claws. One outer claw is used to lock the nut; one inner claw is inserted into the axial groove of the adapter sleeve or shaft.
twenty two. Eccentric locking collar
a grooved steel ring having a pain in the inner hole at one end; the device is in the flat end of the inner spherical bearing with a flat and painful extension end. The inner ring is rotated relative to the inner ring to fix the inner ring; then the top wire is fastened to fix it Tight on the shaft.
twenty three. Concentric sleeve
The rim is mounted on the wide inner ring of the outer spherical bearing; the top wire is screwed into the hole in the inner ring and touched with the shaft.
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