GB/T 25667.3-2010Solid carbide twist drills with parallel shank Part3: Technical specifications (English PDF)
整体硬质合金直柄麻花钻 第3部分：技术条件
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 23, 2010
Implementation date
July 1, 2011
Scope
GB/T 25667.3-2010 is the English-translated version of 整体硬质合金直柄麻花钻 第3部分：技术条件.
GB/T 25667.3-2010 is the Chinese standard "Solid carbide twist drills with parallel shank Part3: Technical specifications".
Its scope clause reads: This section GB/T 25667 specifies the solid carbide straight shank twist (hereinafter all referred to as "twist") in size, structure, wood Material, appearance and surface roughness, marking and packaging of technical requirements.
This section applies to press GB/T 25667.1 and GB/T 25667.2 production of solid carbide straight shank twist. Its clauses include symbol; size and position tolerances; material and hardness; structure.
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Document preview — GB/T 25667.3-2010
National Standard of the People's Republic of China
- ICS
- 25.100.30
- Classification
- J 41
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Symbol
- 4 size and position tolerances
- 5 material and hardness
- 6 Structure
1 Scope
This section GB/T 25667 specifies the solid carbide straight shank twist (hereinafter all referred to as "twist") in size, structure, wood
Material, appearance and surface roughness, marking and packaging of technical requirements.
This section applies to press GB/T 25667.1 and GB/T 25667.2 production of solid carbide straight shank twist.
2 Normative references
The following documents contain provisions which, through reference GB/T 25667 in this section constitute provisions of this section. For dated references,
All subsequent amendments (excluding corrections) or revisions do not apply to this section, however, encourage an agreement under this section
Parties to study the latest versions of these documents, undated reference documents, the latest versions apply to this section.
GB/T 2075 Classification and use of cutting large groups and groups of application of hard cutting materials classification code (GB/T 2075-
2007, ISO 513.2004, IDT)
GB/T 1804 General tolerances Tolerances for linear and angular dimensions without individual tolerance (GB/T 1804-2000, eqv ISO 2768-1.
1989)
GB/T 25667.1 solid carbide straight shank twist drills - Part 1. Straight shank twist type and size
GB/T 25667.2 solid carbide straight shank twist drills - Part 2. 2 ° beveled straight shank twist type and size
3 Symbol
d1 diameter twist drill
Total length l1
deltar twist circumferential edge of the radial axis of the shank runout
deltah twist drill cutting edge of a round shank oblique axis runout
4 size and position tolerances
4.1
Twist total length tolerances according to GB/T 1804C level.
The twist drill 3mm diameter greater than 4.2, its work should be part of the inverted cone diameter, the amount of the inverted cone 100mm length 0.02mm ~ 0.3mm.
4.3
twist of the circumferential edge of the radial axis of the shank of the round beating deltar maximum shall not exceed 0.02mm.
4.4
twist drill cutting edge of a round shank oblique axis runout should not exceed the maximum deltah 0.02mm.
5 material and hardness
Carbide material according to GB/T 2075 selection.
6 Structure
6.1 cutting edge and the direction of the helical groove
Twist the right structure is generally helical groove right cutting edge, it can also be made a left spiral grooves left cutting edge according to user requirements.
6.2 Number of cutting edges
Twist general structure of two cutting edges can also be made three cutting edges according to user requirements.
6.3 internal coolant holes
Twist the general structure without internal coolant holes, according to user requirements can be made with internal cooling holes are also available. Designed by the internal cooling passages of manufacture
GB/T 28253-2025 | GB/T 33524.2-2017 | GB/T 5104-2008 | GB/T 25672-2021 | GB/T 25664-2010 | GB/T 25667.2-2010 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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Related Standards
GB/T 25667.1-2010 — Solid carbide twist drills with parallel shank Part1: The types and dimensions for parallel shank twist drills
GB/T 25667.2-2010 — Solid carbide twist drills with parallel shank Part2: The types and dimensions for parallel shank twist drills with 2°anguar fiants
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