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Mobile bolters Joy Quadbolter

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  • Ideal for mid- to high-seam applications
  • 2.4 to 5.0 m operating range
  • Simultaneous four-bolt installation using two operators

The Quadbolter is a twin-boom four-mast mobile bolter with a wide range of boom movement. The Quadbolter can install four roof bolts simultaneously using two operators. In addition, the outer roof bolters can be rotated over to provide rib bolting, resulting in two roof and two rib bolts at the same time.

The Quadbolter is designed for minimal maintenance, using direct mast-mounted hydraulic controls to reduce the number of hoses required.

Designed for operator ease

  • Large deck area for ease of operator movement
  • Large canopy, rated to withstand a vertical load of 100kN, with adjustable height settings
  • Large capacity, on-board materials pod for storage of bolting consumables
  • Excellent visibility and large walkway (for safe access) for tramming and setting up temporary roof supports

Designed for maximum bolting versatility

  • Semi-automatic control system for installing two bolts in a parallel operation, reducing cycle times
  • Operator-controlled platform level adjustments for varying localized seam conditions (up to an additional 600 mm for high-seam operations)
  • Parallel holding boom arrangement for full range ability for mid- and high-seam applications
Number of roof drillsNominally 4
Number of rib drillsRoof drills roll over to bolt rib
Machine weightApprox. 29,800 kg, depending on options
Ground pressure170 kPa
ATRSThree-point advanced temporary roof support (in front of machine)
Machine length808 mm
Machine width3,160 mm retracted, 5,680 mm with platforms extended
Operating widthUp to 6,000 mm
Operating range2,400 to 5,000 mm
Minimum tramming height2,060 mm
Ground clearance360 mm
Traction speed0 to 20 m/min hydraulic drive, proportional control
Hydraulic tank450 liters main tank plus 350 liters in chassis
MotorsHydraulic pump motor 1 x 125kW air-cooled 50 Hz
Pump Fixed-gear pump, four sections, each section 97 liter/min 
Voltage 1140V, 1050V, or 950V 
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