self-propelled rock bolt | Global Trade leader ecrobot

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self-propelled rock bolt

Posting date : Dec 09, 2013

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Free Member Scince Oct 09, 2013

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VEGETABLE PRODUCTS | Oil seeds

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12-

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1, alloy bit: made by high quality alloy precision process, has the very strong hardness and toughness, penetrating power can make the bolt down more than 2 class surrounding rock, the anchor rod body: assembly, one of the most important components in the drilling and anchorage plays a main role. 3, connecting sleeve: connecting role in the bolt should be extended. 4, plate, able to withstand greater stress of surrounding rock. 5, nut: to surrounding rock stress concentration on the plate. Model ZJS25 ZJS27 ZJS28 ZJS32 ZJS38 ZJS51 External diameter（mm） 25 27 28 32 38 51 Strength of extension（MPa） ≥650 ≥650 ≥650 ≥650 ≥650 ≥650 Tooth height（mm） 1.5±0.1 Screw pitch（mm） 12.7±0.1 Thread direction levorotation Standard length（m） 2.0 3.0 3.5 4.0 4.5 5 6 Error in length ±1% Maximum drilling depth More than 12 m.