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Scales related to bearing public service and dimensions of parts and parts
Source: Bearing network time: 2017-10-25
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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 perpendicular to the axis of the roller (radial plane).
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
Just the interval between the two radial planes including 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; in the direction of different viewpoints; one ferrule is related to the other ferrule; the arithmetic mean 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; 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 includes the ferrule or washer. 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.
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 perpendicular to the axis of the roller axis (radial plane); the spacing 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 integral bore diameter (outer diameter)
The diameter of the inscribed (external) cylinder of all the balls in the radial ball bearing.
9. Roller overall inner diameter (outer diameter) roller complemert bore diameter (outside diameter)
Radial touch roller bearing; diameter of the inner (external) cylinder of all rollers
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