zjs self-propelled rock bolt

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zjs self-propelled rock bolt
Posting date : Feb 19, 2014
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11-
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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

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