JB/T 7919.3-1999 This standard adopts ISO 2982-2:1995 "Locking nuts and locking devices for rolling bearing accessories" in a non-equivalent manner. At the same time, it supplements the technical contents not specified by ISO. This standard is a revision and merger of five standards: JB/T 7919.4-95 "Basic dimensions of locking nuts for rolling bearing accessories", JB/T 7919.5-95 "Basic dimensions of locking washers for rolling bearing accessories", JB/T 7919.6-95 "Basic dimensions of locking clips for rolling bearing accessories", JB/T 7919.7-95 "Technical conditions for tapered bushings, locking nuts and locking washers for rolling bearing accessories" (partial) and JB/T 7916-95 "Locking nuts (wide series) and locking washers with bent inner claws for rolling bearings". During the revision, the size range of 500~1060mm was added; the applicable locking washers and locking card models were added to the locking nuts; and the tolerance values ​​of some sizes were modified. This standard specifies the dimensions, technical requirements, acceptance rules and measurement methods of locking nuts and locking devices. This standard applies to the design, production, inspection and user acceptance of nuts and locking devices for tapered bushings. JB/T 7919.3-1999 Locking nuts and locking devices for rolling bearing accessories JB/T7919.3-1999 Standard download decompression password: www.bzxz.net

ICS21.100.20
Machinery Industry Standard of the People's Republic of China
JB/T7919.3-1999
neqISO2982-2:1995
Rolling bearings
Lock nuts and locking devices
Rolling bearings-AccessoriesLocknuts and locking devices1999-06-28Published
National Machinery Industry Bureau
2000-01-01Implementation
JB/T 7919.31999
Cited standards
Code method
Technical requirements
Measurement method
Inspection rules
Appendix A (Appendix to the standard)
Dimensions and tolerances of wide series locking nuts and locking rings with curved inner rings 12
JB/T7919.3—1999
This standard is not equivalent to ISO2982-2:1995 "Locking nuts and locking devices for rolling bearing accessories" and supplements the technical conditions not specified in the ISO standard.
This standard combines and modifies five standards: JB/T7919.495 "Basic dimensions of locking nuts for rolling bearing accessories", JB/T7919.5-95 "Basic dimensions of locking washers for rolling bearing accessories", JB/T7919.6-95 "Basic dimensions of locking cards for rolling bearing accessories", JB/T79[9.7-95 "Technical conditions for dimensional bushings, locking nuts and locking washers for rolling bearing accessories" (partial), and JB/T7916-95 "Locking nuts for rolling bearings (wide series) and locking washers with bends". The main contents of the modifications are: - Adding a size segment greater than 500-1060mm; - Adding applicable locking washers and locking card models to locking nuts; - Modifying the tolerance values ​​of some dimensions.
This standard replaces JB/T7919.4~7919.6-95, JB/T7919.7-95 (part), JB/T7916-95 from the date of implementation. Appendix A of this standard is the appendix of the standard.
This standard is proposed and managed by the National Technical Committee for Standardization of Rolling Bearings. The drafting unit of this standard: Luoyang Bearing Research Institute. The main drafters of this standard: Guo Baoxia, Li Feixue, Chen Yuan. Mechanical Industry Standard of the People's Republic of China
Rolling bearings
Accessories—Locknuts and locking devices1Scope
JB/T7919.3-1999
neq1sO 29822:1995
Replaces JB/T 7919.4~7919.695
JB/T 791695
Partially replaces JB/T7919.7-95
This standard specifies the dimensions, technical requirements, acceptance rules and measurement methods of locking nuts (referred to as nuts) and locking devices. This standard applies to the design, production, inspection and user acceptance of nuts and locking devices for tapered bushings. 2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the newest versions of the following standards: GB/T 192—1981
GB/T 196-1981
GB/T 272—1993
GB/T 699—1988
GB/T 18041992
GB/T 2516—1981
GB/T 5796.1—1986
GB/T 5796.3—1986
GB/T 5796.4—1986
GB/T 6930—1986
GB/T 8597—1988
JB/T 3574—1997
JB/T 8921—1999
3 Terminology
Basic profile of ordinary thread
Basic dimensions of ordinary thread (diameter 1~600mm)Code method for rolling bearings
Technical conditions for high-quality carbon structural steel
General toleranceUnspecified tolerances of linear dimensions
Deviation table of ordinary thread (diameter 1-355mm)Trapezoidal thread profile
Basic dimensions of trapezoidal thread
Trapezoidal thread tolerances
Vocabulary of rolling bearings
Rolling bearing packaging
Rolling bearing product marking
Inspection rules for rolling bearings and their commodity partsThe terms used in this standard conform to the provisions of GB/T6930. 4 Symbols
4.1 Locking nut (see Figure 1)
Approved by the State Bureau of Machinery Industry on June 28, 1999 and implemented on January 1, 2000
d: Nominal diameter of nut thread
d: 30° chamfer diameter of nut end face
d: Nominal outer diameter of nut
B: Nut width
b: Nut locking groove width
h: Nut locking groove depth
d: Nut end face inner chamfer diameter
g: Nut locking groove root diameter
JB/T 7919.31999
Figure 1 Locking nut
Tiax: Maximum value of chamfer dimension at root of nut locking nut1: Depth of screw hole at end face of nut
s: Basic diameter of screw hole at end face of nut
d: Center circle diameter of screw hole at end face of nut
Ad.: Single diameter deviation of nut d,
Ads: Nut outer diameter deviation
AB: Nut width deviation
Ab: Nut locking groove width deviation
AA: Nut locking groove depth deviation
JE/T 7919.3 1999
S: Circular runout of nut reference end face (30° chamfered end face) V: Variation of nut width
4.2 Locking washer (see Figure 2)
Straight inside low
Figure 2 Locking washer
4: Locking washer inner diameter
d: Root diameter of locking washer outer claw
d: Locking washer outer diameter
B: Locking washer thickness| |tt||B: Protrusion inside the bend
Inner claw
M: Distance between the straight (bend) inner claw and the inner hole surface of the washer, Md-inner claw height f: Width of the outer claw of the locking washer
: Width of the inner claw of the locking washer
N: Number of outer claws of the locking washer
2: Chamfer size Ad at the root of the inner diameter of the locking washer: Deviation of the inner diameter of the locking washer
△da: Locking washer Deviation of outer claw root diameter AB.: Deviation of locking washer thickness
△B: Deviation of inner claw protrusion of locking washer bend Af: Deviation of outer melon width of locking washer
Af,: Deviation of inner claw width of locking washer
AM: Deviation of locking washer M
Vol: Variation of locking washer thickness
4.3 Locking card (see Figure 3)
d: Locking card screw Hole diameter
B,: Locking card wall thickness
B,: Locking card width
Z: Locking card inner wall width
L,: Locking card height
L,: Locking card length
L: Thread length
AB.; Locking card width deviation
△Ls: Locking card height deviation
5 Code method
JB/T 7919.31999
Figure 3 Locking card
The codes for nuts, locking washers and locking cards are composed of type code, size series code and true diameter code indicating the nominal diameter of the nut, and are arranged in this order.
5.1 Type code
Type code is represented by the following letters:
KM-nut type code, indicating metric common threadHM--nut type code, indicating metric trapezoidal threadMB-locking washer type code, indicating straight inner clawMBA-locking washer type code, indicating inner claw is bent inwardMBB-locking washer type code, indicating inner claw is bent outwardMS-locking card type code
5.2 Dimension series code
Dimension series code is represented by the letter L for 30 series, W for wide series, and other series are omitted. 5.3 Diameter code
The diameter code indicating the nominal diameter of the nut shall be in accordance with the provisions of the bearing inner diameter in GB/T272. 5.4 Code example
6 Marking
Marking example:
Nut with a nominal diameter of 40mm is marked as: IB/T 7919.3-1999
Nut nominal diameter code
Dimension series code
Nut type code
Corresponding nut nominal diameter code
Dimension series code
Lock washer type code
Corresponding nut nominal diameter code
Dimension series code
Locking card type code
KM 08JB/T 7919.3—1999
The corresponding nut nominal diameter is 40mm, the straight inner claw lock purple washer is marked as: MB08JB/T7919.3—1999
The corresponding nut nominal diameter is 240mm, 30 series locking card is marked as: MSL48JB/T7919.3-—1999
The size of the nut is in accordance with the provisions of Table 1 and Table 2, and the wide series is shown in Appendix A (Standard Appendix). Table 1 KM, HM type locking nut
Locking nut
M10 ×0.75
M12×1
M15×!
M17×1
M20×1
M22 ×1
Reference size
Applicable locking
Seat model
Selected lock
Tightening card model
Lock nut
M 25 × 1.5
M 28×1.5
M 32 × 1.5
M 40 × 1.5
M 55 ×2
M60×2
M 65 ×2
M 70 ×2
M 75 × 2
M80 ×2
M85×2
M 90×2
M95×2
M100×2
M105×2
M110×2
M1t5x2
M120×2
M130×2
0 × 2
M145×2
M 150×2
M 155×3
M 160 ×3
M165×3
M 170 ×3
M 180×3
M 190 ×3www.bzxz.net
M200×
JB/T7919.31999
Table 1 (continued)
Reference dimensions
Applicable mirror
Pad model
Applicable lock
Tightening card model
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