GB/T 4267-1984
Replaced
GB/T 20331-2025
Active
National standards
GB/T 20331-2025 Machine taper 1∶50 pin reamers with parallel shanks
GB/T 20331-2025 Machine taper 1∶50 pin reamers with parallel shanks
Basic Information
Standard Code:
GB/T 20331-2025
Standard Type:
National standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Knives
ICS Name:
Drill, reamer, and hobbing cutter
Publish Date:
2025-10-31
Implement Date:
2026-05-01
Pages:
12 pages
Scope
This document specifies the type and dimensions, marking, technical requirements, labeling, and packaging of 1:50 taper pin reamers (hereinafter referred to as "pin reamers") for straight-shaft machines.
This document is applicable to the manufacture of pin reamers with sizes ranging from 2 mm to 12 mm.
Development Information
Replace the following standards
Referenced Standards
Adopt standards
ISO 3466:2016
Related Standards
GB/T 14299-1993
Replaced
GB/T 14299-1993 Spiral flute drill with indexable inserts
GB/T 14332-1993
abolished_transferred
GB/T 14332-1993 Ejector drills with carbide tips
GB/T 1438.1-1996
Replaced
GB/T 1438.1-1996 Taper shank twist drills—Part 1:The types and dimensions for Morse taper shank twist drills
GB/T 1438.2-1996
Replaced
GB/T 1438.2-1996 Taper shank twist drills—Part 2:The types and dimensions for long Morse taper shank twist drills
GB/T 1438.3-1996
Replaced