50m Electric Tunnel Drilling Rig
Jining Bafang Mining Machinery Co.,Ltd is one of the leading 50m electric tunnel drilling rig manufacturers and suppliers in China,Website:, welcome to buy cheap and low price 50m electric tunnel drilling rig made in China from our factory.ZLJ-250 Rotary mine tunnel underground drilling machine Description of ZLJ-250 Rotary mine tunnel underground drilling The mine drilling machine mainly suitable for drilling gas drainage/discharge holes, water injection holes in coal bed, geological exploratory holes and various engineering holes. It's suitable for various coal beds and rock formation with the rock. Technical parameters of drilling rig manufactures Item Unit Technical Parameter ZLJ-250Rated torqueHigh speed250Medium speedN·m150Low speed85Rated speedHigh speedr/min340Medium speed192Low speed.112Rated pressureMpa8Max feed forcekN9Max pulling and lining forcekN12Drilling angle°0~360°Capacity of drumm26.3Diameter of wire ropeMm8.8Drill rod calibermm42Supply water pressureMpa0.6~1.2PowerkW4VoltageV380/660Rated currentA8.8/5.3Dimensionsmm1235×630×1165WeightKg440
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