MINDRILL SYSTEMS & SOLUTIONS PVT LTD.
Manufacturer of Mining & Construction Equipment
MJ656 4W
jackleg drill

 MJ656 4W Jackleg Drill

 

MJ656 4W jackleg drill is the most economical and dependable rock drill for underground mines and tunnels because of its design which includes rifle bar rotation and flushing system with double concentric tubes.

 

 

Features & Benefits

 

  • This drill forms holes of diameters 27-40 mm (1 1/16″ – 1 9/16″) and depths up to 6 meter (20′).
  • This drill is used for horizontal or inclined drilling in conjunction with a pusher leg in underground mines and tunnel drilling.
  • It has low air consumption and a very high drilling rate compared to the weight of the drill.
  • Because of its low weight, it can also be used as a sinker.
  • Parts are interchangeable with Atlas Copco RH656 4W.

 

Technical Specification
Type Metric Imperial
Weight 25 kg 55 lb
Length 658 mm 25 29/32 inch
Air consumption 48 l/s 102 cfm
Blows per minute 2040 2040
Piston diameter 65 mm 2 17/32 inch
Stroke length 59 mm 2 5/16 inch
Largest reaming diameter 76 mm 2 31/32 inch
Hole diameter 27 – 41 mm 1.06 – 1.61 inch
Shank Size (mm) 22 x 108 mm 7/8 x 4 1/4″ inch
Optional Shank Size 25 x 108 mm 1 x 4 1/4 inch
Working Pressure 6 Bar
Suitable Pusher Leg BMK 62 S
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