This standard specifies the corrugated thread of drill tools for hydraulic rock drills in coal mines and its basic dimensions and tolerances. This standard applies to the corrugated thread of drill tools for hydraulic rock drills in coal mines, and the corrugated thread of drill tools for heavy-duty pneumatic rock drills should also be implemented as a reference. MT/T 516.1-1995 Corrugated thread of drill tools for hydraulic rock drills in coal mines MT/T516.1-1995 Standard download decompression password: www.bzxz.net

Coal Industry Standard of the People's Republic of China
Tools for Hydraulic Rock Drills in Coal Mines
Wave Thread
MT/T516.1—1995
This standard adopts the international standards IS010207 "Rock Drilling - Connecting Rod Drilling Tools for Impact Rock Drilling - 22~38mm" and ISO10208 "Rock Drilling - Left-Hand Wave Thread". 1 Subject content and scope of application
This standard specifies the wave thread and basic dimensions and tolerances of drill tools for hydraulic rock drills in coal mines. This standard is applicable to the wave thread of drill tools for hydraulic rock drills in coal mines, and the wave thread of drill tools for heavy-duty pneumatic rock drills should also be implemented by reference.
2 Basic requirements
2.1 The wave thread of drill tools for hydraulic rock drills in coal mines shall comply with the provisions of this standard. 2.2 The wave connection thread of drill tools for hydraulic rock drills in coal mines is specified as left-hand thread. 3 Basic dimensions and tolerances
3.1 The dimensions and tolerances of internal wave threads shall comply with the provisions of Figures 1, 2 and Table 1. Figure 1 Magnification of internal thread
D-thread internal diameter, H-thread height Rt, R.-wave thread arc radius, P-pitch 3.2 The dimensions and tolerances of external wave threads shall comply with the provisions of Figures 2, 3 and Table 2. Approved by the Ministry of Coal Industry of the People's Republic of China on December 28, 1995 and implemented on May 1, 1996
Nominal diameter of thread (D)
Basic size
Allowable deviation
Basic size
Allowable deviation
Basic size
Allowable deviation
Thread direction
MT/T516.1—1995
Common tangent to the true line () and R (,>
Figure 2 Schematic diagram of the common tangent line of the arc of the left-handed wave threadFigure 3 Enlarged schematic diagram of the external thread
Nominal diameter (d)
Basic size
Allowable deviation
Basic size|| tt||Allowable deviation
Basic size
Allowable deviation
Basic size
Allowable deviation
Thread direction
Additional instructions:
MT/T516.1—1995
This standard is proposed by the Standardization Technical Committee for Coal Mine Special Equipment of the Ministry of Coal Industry. 0bzxZ.net
This standard is under the jurisdiction of the Mine Equipment Branch of the Standardization Technical Committee for Coal Mine Special Equipment of the Ministry of Coal Industry. This standard was jointly drafted by the Beijing Well Construction Research Institute of the China Coal Research Institute, the Wuxue Changjiang Tool Factory in Chaobei, and the Weining Mining Machinery Factory in Hubei. The main drafters of this standard are Xing Qinggui, Guo Xiaoxian, Wang Weihua, Peng Fuhua, and Feng Zhiyong. This standard is entrusted to the Beijing Well Construction Research Institute of the China Coal Research Institute for interpretation. 231
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