Joy 12HM46 continuous miner

12HM series

Joy 12HM46

  • Ripperveyor cutting head system
  • 1473 mm (58 in.) cutter head diameter, ideal for industrial mineral mining applications
  • Cooling system designed to meet mine’s water requirements
  • Bolted construction to meet shaft entry requirements
  • Individual motors with direct-drive transmissions to power the cutter, traction, gathering, and hydraulic systems
  • Outboard access for motors, gearcases, controllers and other major components to reduce downtime and maintenance costs
  • Remote radio control operations, with different frequencies available for multi-machine sections
  • Optidrive AC electronic system to provide smooth transmission responsiveness
  • Faceboss control platform to facilitate an optimal balance of production rate and cost
  • Dual scrubber systems for dust control (optional)
  • 30% more machine mass to increase the available sump and shear forces at higher cutter heights
  • The mass, along with the power and stability, of the new traction system provides 25% more sumping force
  • Completely redesigned traction system with a 35% stronger gearcase and 30% longer track frame for added stability
  • The first Joy HM machine designed with upshear and downshear forces; has two times the upshear force as its predecessor  - more available force equals higher production rates

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The 12HM46 continuous miner, with a dual gathering head system, is ideal for industrial mineral mining applications, including trona, gypsum, potash, and salt. The 12HM46, with a 1473 mm (58 in.) cutter head diameter, is the largest and most powerful drum-style continuous miner in our product lineup. With a machine mass of 154,000 kg (340,000 lbs.) and a maximum cutting height of 6.0 m (20 ft.), the 12HM46 has what it takes to increase production in the tough industrial mineral cutting environment. 

Cutting system

The 12HM46 is a Ripperveyor cutting head system, with a variety of cutter bit lacing configurations available.

Bolted construction

Since many industrial mineral mines have shaft restrictions, the 12HM46 comes in several bolted configurations to accommodate these restrictions. This continuous miner is designed to be assembled on site without, or with very limited, component welding.

Traction system

All 12HM series machines include heavy-duty crawler chain, along with a heavy-duty drive system, to effectively tram the machines. 

The 12HM46 traction system includes our patented Optidrive AC electronic system, which is coupled to a compact, all-gear transmission to provide smooth, reliable service. The cutter motor feedback and the traction differential features optimize sump performance even in the most demanding applications. Finally, the brushless AC traction motors are highly reliable and require minimal maintenance.

Conveyor system

The conveying system on all 12HM series machines features a 965 mm (38 in.) conveyor to provide increased production capability. 12HM series machines come with a standard single rear conveyor drive; however, an optional dual rear conveyor chain drive is also available.

High-voltage operation

All 12HM series continuous miners are designed operate at 2300V 60Hz, 4160V 60Hz, or 3300V 50 Hz.  High-voltage operation also provides lower costs associated with component failures and the potential to use a trailing cable with a smaller conductor size (as compared to a medium-voltage miner).

Haulage system compatibility

The 12HM series continuous miners can be customized, using different conveyor lengths and conveyor chain speeds, to optimize our batch or continuous haulage systems.  In addition, we can also supply a conveyor to match an attached haulage system.

Loading rate 19 to 35 tonnes/min 21 to 38 ton/min
Cutter head diameter 1473 mm 58 in.
Chain pitch
Speed options

965 mm
406 or 609 mm
82 mm
123 m/min or 147 m/min

38 in.
16 or 24 in.
3 1/4 in.
402 fpm or 480 fpm
Crawler chain:

560 mm
184 mm

22 in.
7 1/4 in.
Cutter drums 57 mm 2 1/4 in.
Cutting width 4115 to 4572 mm 13 ft. 6 in. to 15 ft.
Ground pressure 260 kPa* 38.0 psi*
Weight 154,000 kg* 340,000 lbs.*
Maximum cutting height 6000 mm* 236 in.*
Minimum cutting height 2692 mm* 106 in.*
Basic chassis height 2184 mm* 86 in.*
Ground clearance 305 mm 12 in.
Tram speed:

4.6 m/min
9.1 m/min
19.8 m/min

15 fpm
30 fpm
65 fpm
Gathering arm speed 45 or 54 rpm 45 or 54 rpm
Cutter speed 42 m/min 42 fpm
Bit tip speed 190.8 m/min 626 fpm
* Dimensions shown are for C model and may vary for other models or configurations. 

Faceboss control system

Competitive and market pressures mean that you have to produce product at an ever-increasing rate, while always striving to decrease your cost per ton. These goals are only made more difficult by the worsening attributes of available reserves and deteriorating operating conditions.

The Faceboss control system enables your operators to operate equipment at an optimal balance of production rate and cost per ton using a powerful tool set that includes operator assistance tools, automated sequences, advanced diagnostics, machine performance monitoring, and analysis tools. Faceboss is the standard control system platform on all Joy underground mining equipment, which ensures that you receive the same level of optimization for all your Joy equipment.

Learn how Faceboss can help reduce your operating costs. 

Optidrive AC

Joy Optidrive, an AC variable-frequency drive system, integrates software with the electronic and mechanical systems to provide the following features:

  • Increased tram speed: Significantly increases the tractive effort available, improving the equipment’s ability to climb gradients and negotiate difficult roadway conditions
  • Regenerative braking: Supplements the mechanical brakes, allowing them to run cooler with extended wear life; regenerative braking is highly effective at automatically maintaining constant speeds when descending gradients.
  • Less maintenance: No commutator brushes to inspect and replace mean AC traction motors are typically more reliable, more durable, and require less maintenance than DC traction motors

Learn how Optidrive can help improve your productivity. 

Scrubber systems

The Joy scrubber system - an auxiliary dust control system integrated into the continuous miner - works with the mine ventilation system to help reduce overall local dust exposure. The major system components include:

  • Ductwork
  • Impingement screen
  • De-mister
  • Fan
  • Attenuator

Our scrubber systems can be configured to support localized face ventilation plans by selecting the air volume along with the inlet and discharge locations.

SmartZone proximity system

The SmartZone proximity system is an integrated training device that helps teach your personnel to operate a continuous miner from safe working zones, as well as stay clear of related danger zones. The SmartZone system tracks, recognizes, and logs personnel movements around the machine to provide in-depth analysis for your training initiatives.

Learn how SmartZone keeps train your mine personnel. 

Two-way radio remote

The continuous miner two-way radio remote is designed with the operator in mind, featuring large controls for common functions (easily differentiated by feel), common functions loaded to be close to the operators' natural hand positions, and uniquely shaped levers to differentiate functions. 

Learn how the two-way radio remote makes your operator's job easier