MT/T 187.5-1988 English PDF

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MT/T 187.5-1988: (Scraper conveyor fasteners. Rectangular head bolts)

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
MT/T 187.5-1988	159	Add to Cart	2 days	(Scraper conveyor fasteners. Rectangular head bolts)

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Basic data

Standard ID: MT/T 187.5-1988 (MT/T187.5-1988)
Description (Translated English): (Scraper conveyor fasteners. Rectangular head bolts)
Sector / Industry: Coal Industry Standard (Recommended)
Classification of Chinese Standard: D93;J13
Classification of International Standard: 73.100.99
Word Count Estimation: 4,434
Date of Issue: 4/13/1988
Date of Implementation: 8/1/1988
Quoted Standard: MT 187.1
Summary: This standard applies to the coal mine under the scraper conveyor used rectangular bolts (hereinafter referred to as bolts).

MT/T 1:

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Scraper conveyor fasteners. Rectangular head bolts) Ministry of Coal Industry Standards MT/T 187.5-88 Scraper conveyor fasteners Rectangular bolt 1988-04-13 Approved 1988-08-01 Approved by the Ministry of Coal Industry of the People's Republic of China

Contents

1 Scope of application 1 2 Normative references 1 3 Product Category 1 4 Technical requirements 3 Scraper conveyor fasteners Rectangular bolt

1 Application

This standard applies to rectangular head bolts (hereinafter referred to as bolts) used in coal mine underground scraper conveyors.

2 Reference standards

MT 187.1 Scraper conveyor fastener bolt technical specifications

3 Product Categories

3.1 There are four specifications of M20, M22, M24 and M27. 3.2 Type and size are shown in the figure below and Tables 1 and 2. Table 1 mm d 20 22 24 27 Basic size 28 32 36 40 Limit deviation ± 1 ± 1 ± 1 ± 1 d1 18 0-0.5 20 0-0.5 22 0-0.5 25 0-0.5 H 14 ± 1 16 ± 1 18 ± 1 20 ± 1 H1 9 10 11 12 S1 14 16 18 20 D 40 ± 1 44 ± 1 48 ± 1 54 ± 1 Table 1 (continued) mm d 20 22 24 27 Basic size 28 32 36 40 Limit deviation ± 1 ± 1 ± 1 ± 1 D1 28 0-1 30 0-1 32 0-1 36 0-1 h 4.5 ± 0.5 5 ± 0.5 5.5 ± 0.5 6 ± 0.5 t 1.5 1.5 2 2 r 2 c 2.5 Table 2 mm L0 (including screw tail) and weight per 1,000 steel bolts Basic size limit deviation L0 weight kg≈ L0 weight kg≈ L0 weight kg≈ L0 weight kg≈ ± 1.25 30 169.7 30 182.0 35 232.7 ± 1.5 30 194.3 35 247.7 40 318.5 30 206.6 35 262.6 40 336.2 45 441.9 30 219.0 35 277.5 40 354.0 45 464.4 30 231.3 35 292.4 40 371.7 45 486.8 30 243.6 35 307.3 40 389.5 45 509.3 30 256.0 35 322.2 40 407.2 45 531.8 ± 1.75 35 337.1 40 425.0 45 554.2 35 366.9 40 442.7 45 576.7 35 396.8 40 478.3 45 621.6 40 513.8 45 666.5 40 549.3 45 711.5 ± 2.0 40 584.8 45 756.4 40 620.3 45 801.3 45 846.2 45 891.1 45 936.1 45 981.0 Limit deviation of L0 3.3 Marking example. Coarse-headed ordinary thread, large diameter 24mm, length 90mm, rectangular head bolt with mechanical performance class 8.8. Bolt M24 × 90-8.8MT 187.5-88 3.4 Marking description.

4 Technical requirements

4.1 The mechanical properties of the bolt are not less than 8.8. 4.2 The technical conditions of bolts are in accordance with the provisions of MT 187.1. Additional information. This standard was proposed by the Technology Development Department of the Ministry of Coal Industry of the People's Republic of China. This standard is under the jurisdiction of the Taiyuan Branch of the Coal Research Institute. This standard was drafted by Harbin Coal Mine Machinery Research Institute. The main drafters of this standard are Cong Peijian and Jia Delin. This standard entrusts Taiyuan Branch of Coal Science Research Institute with interpretation. ......

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