This part specifies the classification, parameters, accuracy inspection, naming and marking of wrenchless three-jaw self-tightening drill chucks and wrenchless three-jaw hand-tightening drill chucks. JB/T 4371.1-2002 Wrenchless three-jaw drill chuck Part 1: Parameters and accuracy inspection JB/T4371.1-2002 Standard download decompression password: www.bzxz.net

ICS25.100.30
Machinery Industry Standard of the People's Republic of China
JB/T4371.1——2002
Replaces JB/T4371.11999, JB/T4371.2—1999Keyless type three-jaw drill chucksPart 1: Parametersandaccuracytesting(Is010888:1999,Keylesstype
Three-jaw drill chucks--specification, MOD)2002-07-16 Issued
2002-12-01 Implementation
Issued by the State Economic and Trade Commission of the People's Republic of China Foreword
Normative references
Parameters and connections of self-tightening drill chucks
4.1 Parameters,
4.2 Connections,
5 Precision inspection of self-tightening drill chucks
5.1 Inspection methods.
5.2 Tolerances and Test rod
6 Parameters and connection of hand-tight drill chuck
6.1 Parameters.
7 Accuracy inspection of hand-tight drill chuck
Inspection method..
Tolerance and test rod
JB/T4371.1—2002
JB/T4371-2002 "Keyless three-jaw drill chuck" is divided into two parts: Part 1 Parameters and accuracy inspection
Part 2 Technical conditions.
JB/T4371.1—2002
This part is the first part of JB/T4371, corresponding to the international standard ISO10888:1999 (E) "Technical specification for keyless three-jaw drill chuck" (1999 English version). The consistency of this part with ISO10888:1999 (E) is modified and adopted, and the standard structure is the same. The main differences are as follows:
Added the metric common thread connection form adapted to my country's national conditions: The precision index of the taper hole connection form of the self-tightening drill chuck increased the precision grade (grade); The naming method in JB/T2326 "Machine Tool Accessory Model Compilation Method" is adopted. This part replaces JB/T4371.1-1999 "Self-tightening Drill Chuck Parameters" and JB/T4371.2-1999 "Self-tightening Drill Chuck This part is compared with JB/T4371.11999 and JB/T4371.2-1999. The main changes are as follows: Precision Inspection".
The original standard's G1 P-level accuracy index is revised and incorporated into this part as: Other accuracy index requirements are in accordance with ISO10888: Parameters are in accordance with ISO10888:
Inch threaded hole connection is added:
Parameters and accuracy requirements for hand-tight drill chucks are added. This part is proposed by the China Machinery Industry Federation. This part is under the jurisdiction of the National Technical Committee for Standardization of Metal Cutting Machine Tools. The responsible drafting unit of this part: Yantai Machine Tool Accessories Research Institute. Participating drafting units of this part: Shandong Yuguang Machinery Corporation, Shanxi Huifeng Machinery Factory, Linyi Shengxin Machinery Manufacturing Co., Ltd., Shandong Machine Tool Accessories Factory.
The main drafters of this part: Shi Shuqing, Gu Ruiguo, Su Lihang, Ren Shuchun, Zhang Qiquan. This part was first issued in 1986 and revised for the first time in 1999. m
1 Scope
Spannerless three-jaw drill chuck
Part 1: Parameters and accuracy inspection
JB/T4371.1—2002
This part of JB/T4371 specifies the classification, parameters, accuracy inspection, naming and marking of spannerless three-jaw self-tightening drill chucks (referred to as self-tightening drill chucks) and spannerless three-jaw hand-tightening drill chucks (referred to as hand-tightening drill chucks). This part is applicable to self-tightening drill chucks with taper holes or threaded holes and hand-tightening drill chucks with threaded holes. 2 Normative references
The clauses in the following documents become the clauses of this part through reference in this part of B/T4371. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, parties who reach an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this part. GB/T196 Basic dimensions of common thread (diameter 1 to 600 mm) GB/T197 Tolerances and fits of common thread (diameter 1 to 355 mm) GB/T60871993 Wrench drill chuck
JB/T2326 Method for compiling model of machine tool accessories ISO239:1999
ISO263:
ISO725:
ISO5864:1978
3 Classification
Drill chuck cone
IS O-inch thread - general scheme and selection of screws, bolts and nuts Diameter range 0.06 to 6 inch ISO inch thread - basic dimensions
Inch thread - allowances and tolerances
Drill chucks are classified according to their different uses as follows: Type code
Heavy drill chuck
Medium drill chuck
Light drill chuck
Parameters and connections of self-tightening drill chucks
4.1 Parameters
4.1.1 Parameters of the tapered hole connection form are shown in Figure 1 and Table 1. Use
For machine tools and heavy-duty processing
Mainly used for light-duty processing and portable toolsFor light-duty processing and household drilling tools
JB/T4371.1-—2002
Clamping range
(from to)
Clamping range
(from to)
mDrill chuck jaws closed size.
Parameters of threaded hole connection form are shown in Figure 2 and Table 2. Type
Clamping range
(from to)
Clamping range
(from to)
almDrill chuck jaws closed size.
4.2 Connection
Conical hole connection form is shown in Figure 3 and Table 3.
Unit: mm
Unit: mm
Clamping diameter
Note: For detailed dimensions of the tapered hole, see ISO239:1999. Short Morse taper.
Short Jagg taper.
Threaded hole connection form see Figure 4 and Table 4,
JB/T4371.1—2002
JB/T4371.1-2002
Clamping diameter
3/8×24
Inch thread
1/2×20
5/8×16
Thread depth I
Ordinary thread
M12×1.25
Note: Inch thread according to ISO263:1973, ISO725;1978 and ISO5864:1978; ordinary thread according to GB/T196, GB/T197. Precision test of self-tightening drill chuck
Testing method
The precision test of drill chuck is to measure the rotary runout of the test rod of specified length clamped by the drill chuck. The test is to locate the tapered hole or threaded hole of the drill chuck and the outer end face, fasten it on the test mandrel, clamp the test rod with the jaws, and touch the generatrix of the test rod vertically. The test is carried out by rotating the mandrel, see Figure 5. The measurement result is the difference of the maximum reading of the indicator. For H-type and M-type drill chucks, the measurement should be carried out on two test rods with the maximum clamping diameter and about 1/2 of the maximum clamping diameter. For L-type drill chucks, only the maximum clamping diameter is measured. The test mandrel is in accordance with 5.1.1 of GB/T60871993. 5.2 Tolerance and test rod
The runout tolerance of drill chuck and the diameter and length of the test rod are shown in Figure 5 and Table 5. Test rod
Test point
Test rod
d=maximum clamping diameter
d1/2maximum clamping diameter
Conical hole connection
Threaded hole connection
Conical hole connection
Threaded hole connection
Parameters and connections of hand-tight drill chuck
6.1 Parameters
Parameters of threaded hole connection are shown in Figure 6 and Table 6. Type
Clamping range (from/to)bZxz.net
Clamping range (from to)
Clamping range (from to)
1 Dimensions of drill chuck jaws after closing,
Drill chuck connection threads are shown in Figure 7 and Table 7.
JB/T4371.1—2002
Unit: mm
Unit: mm
JB/T4371.1-2002
Clamping diameter
Inch thread
3/8×24
1/2×20
5/8×16
Thread depth
Ordinary thread
M12×1.25
Ordinary thread is in accordance with GB/T196 and GB/T197. Note: Inch thread is in accordance with ISO263:
:1973, ISO725:1978 and ISO5864:1978:7Precision inspection of hand-tight drill chucks
Inspection method
The precision inspection of drill chucks is to measure the rotary runout of the test rod of specified length clamped by the drill chuck. The inspection is to locate the threaded hole and the outer end face of the drill chuck, fasten it to the inspection mandrel, clamp the inspection rod with the jaws, and touch the generatrix of the inspection rod vertically with the indicator probe. The inspection is carried out by rotating the mandrel, see Figure 8. The measurement result is measured by the difference in the maximum reading of the indicator. For H-type and M-type drill chucks, the measurement should be carried out on two inspection rods with the maximum clamping diameter and about 1/2 of the maximum clamping diameter. For L-type drill chucks, only the maximum clamping diameter is measured. The inspection mandrel is in accordance with 5.1.1 of GB/T6087-1993. 7.2 Tolerance and inspection rod
The runout tolerance of the drill chuck and the diameter and length of the inspection rod are shown in Figure 8 and Table 8. Figure
Tolerance
8 Naming
Inspection rod
d=maximum clamping diameter
d~1/2maximum clamping diameter
Threaded hole connection form
Threaded hole connection form
Threaded hole connection form
The naming of the drill chuck should comply with the provisions of JB/T2326. The naming includes the following: a) Drill chuck name;
Drill chuck type code J:
Group code indicating the drill chuck type:
1) Self-tightening drill chuck: the group code for tapered hole connection is 01, and the group code for threaded hole connection is 03: 2) Hand-tightening drill chuck: the group code for threaded hole connection is 15; Main parameter - maximum clamping diameter:
Drill chuck type (H or M, L):
Major improvement serial number (if no content is provided), g)
Connection form code:
1) Tapered hole connection form: Morse taper number or Jag taper J plus taper number: 2) Threaded hole connection form: English thread or ordinary thread code. Example 1:
JB/T4371.12002
Unit: mm
Self-tightening drill chuck, tapered hole connection type, B16 Morse tapered hole connection, maximum clamping diameter 13mm, heavy duty, named as follows: Self-tightening drill chuck J0113H/B16
Example 2:
Self-tightening drill chuck, tapered hole connection type, No. 2 short Jag tapered hole connection, maximum clamping diameter 8mm, medium duty, named as follows: Self-tightening drill chuck J018M/J2s
Example 3:
Hand-tightening drill chuck, threaded hole connection type, imperial thread 1/2×20, maximum clamping diameter 13mm, light duty, named as follows: Hand-tightening drill chuck J1513L/1/2×20
9 Marking
There should be obvious permanent markings on the drill chuck and the product packaging box. 9.12
9.2 The following contents shall be marked on the obvious position of the drill chuck: a) Trademark and model:
b) Clamping range:
Connection form code.
9.3 The following contents shall be marked on the packaging box:
a) Trademark and model:
JB/T4371.1—2002
Clamping range:
Connection form code:
Product name;
Manufacturer name and address:
Standard number.
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