GB/T 39140.2-2020 in English
VALIDClamping flanges for diamond circular saw blade—Part 2:Building construction and civil engineering
- Issued on:2020-10-11
- Implemented on:2021-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
| Standard No: | GB/T 39140.2-2020 |
| Document status: | VALID |
| Title in English: | Clamping flanges for diamond circular saw blade—Part 2:Building construction and civil engineering |
| Title in Chinese: | 金刚石圆锯片用夹紧卡盘 第2部分：建筑施工和土木工程 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2020-10-11 |
| Implemented on: | 2021-05-01 |
| ICS Classification: | 25.100.70-Abrasives |
| Chinese Classification: | J43-Grinding material and apparatus |
| Professional Classification: | GB-National Standard |
| Related Keywords: | standard chuck type applicable equipment key size range
building construction civil engineering introduction analysis heavy construction equipment circular saw |
| Related Topics: | civil Engineering
GB/T 39140.2 GB/T 39140.2-2020 Building Construction |
《GB/T 39140.2-2020金刚石圆锯片用夹紧卡盘 第2部分：建筑施工和土木工程》由TC139（全国磨料磨具标准化技术委员会）归口，TC139SC3（全国磨料磨具标准化技术委员会超硬材料及制品分会）执行，主管部门为中国机械工业联合会。
Introduction
Analysis of the core content of the standard
| Chuck type | Applicable equipment | Key size range (mm) | Drive pin configuration |
|---|---|---|---|
| Type A | Handheld cutting machine | D≤400,H=16-27 | D>230 requires configuration |
| Type B | Fixed cutting machine | D≤1000,H=15.88-60 | 6×60° distribution |
| Type E | Wall cutting machine | D≤2000,H=25.4-60 | M8/M12 bolts |
Key technical requirements
Material strength requirements: Steel/cast steel/ductile iron with a yield strength of ≥300MPa must be used, and the bolt performance must meet the 6.8 grade standard of GB/T3098.1. Among them, when the D-type chuck is 1200<D≤1500mm, the flange diameter F is adjusted from the ISO standard 120mm to 125mm.
Implementation and application suggestions
Case: When a subway project uses a C-type chuck (D=800mm) to cut reinforced concrete piles, the H=35mm specification should be selected, and the transmission pin should be checked to see if it meets the 6×60° distribution requirement. Tag example: Chuck GB/T39140.2-C1-800×35×140
Standard evolution analysis
Compared with ISO21537-2:2004, the main improvements of this standard include: adding 230-400mm intermediate specifications, clarifying the material yield strength, and optimizing the distribution of large-diameter chuck transmission pins (from single pin to 6×60°), which is more in line with the working conditions of China's heavy construction equipment.
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