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S250-M3

MARKETS: Mining

The new S250-M3 has significantly improved the industry standard S250 offering 3 primary configurations as well as advanced noise suppression.

  • Less Noise: Independent testing reported the S250-M3 produced 50% (6 dBA) less sound pressure than the leading competitor rock drills.
  • Less Cost: Due to reduced amount of energy transferred into the components of the S250-M3, less wear is experienced.
  • More Torque and Penetration: The S250-M3 channels more energy to the face of the rock and less into the body of the driller operating it.
  • Improved Efficiency: Torque increased by 39% and penetration by over 6 inches per minute at 110 psi.
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  • Features
  • Specifications
  • Options
  • Works With
  • Downloads

S250-M3 Rock Drill

Muffled Design

Patented Design drastically reduces operating noise, while significantly decreasing vibration.  Drillers benefit from the full production of the S250 without the fatigue.

Premium Materials

The S250-M3 uses premium material, machined to exacting specifications to deliver high performance and exceptional durability.

Proven Technology

Boart Longyear's S250-M3 rock drill is based on the well established, market-leading S250 design.

UHex 22 MM and 25 MM Chuck Ends

Boart Longyear provides both 22 mm and 25 mm hex chuck ends to accommodate popular steel sizes.

Services and Training

Boart Longyear offers on-site services training and complete rebuild and overhaul service to ensure optimal drill performance and extended life.

 

Jackleg / Sinker Rock Drill Specification

MetricU.S.
Bore79.4 mm3.126 in
Stroke73.25 mm2.884 in
Blows / Minute2200 @ 6.2 bar90 psi
Air Consumption4.4m3/min @ 6.2 bar156 cfm @ 90 psi
Air Connection-1 in BSP
Water Connection-1/2 in BSP
Weight38.1 kg84 lb

Stoper Drill Specification

MetricU.S.
Bore79.4 mm3.126 in
Stroke73.25 mm2.884 in
Blows / Minute2200 @ 6.2 bar2200 @ 90 psi
Air Consumption4.4m3/min @ 6.2 bar175 cfm @ 90 psi
Air Connection-1 in BSP
Water Connection-1/2 in BSP
Weight 43.5 kg96 lb
Standard Airleg Weight15.5 kg34 lb

Supply Hose ID (required)

MetricU.S.
Air 25 mm 1 in
Water 12 mm 1/2 in

Steel Size (HEX) - Chuck End

MetricU.S.
Standard22 mm HEX x 108 mm long7/8 in HEX x 4-1/4 in long
Optional25 mm HEX x 108 mm long1 in HEX x 4-1/4 in long
* Drill designed to accept collared/tapered HEX steel to ISO standard 723

Standard S250-M3 Airleg (Sold Separately)

MetricU.S.
Bore Diameter68 mm2.677 in
Stroke Length1295 mm51 in
Thrust230 kg at 6.2 bar506 lb @ 90 psi

Accessories

Football Style Lubricator
4 hours drilling capacity with S250 rockdrill
Install in line, within 3.5 m (12 ft) of rockdrill
Weight: 4.8 kg (10.6 lb)
Capacity: 600 mL (36.6 in3) rockdrill oil
Min/Max Adjustment: 1/4 turn

Optional S250-M3 Airleg (Sold Separately)

MetricU.S.
Stroke Length991 mm39 in
Stroke Length762 mm30 in

Noise Emissions*

Muffled Noise Pressure 113.5 dB(A)
Power 126.5 dB(A)
Unmuffled Noise Pressure 116.0 dB(A)
Power 129.0 dB(A)
Notes:Noise levels are measured in accordance with ISO3744 and SANS1470 (Part 4)
Boart Longyear has done extensive research and testing in noise reduction and have found that a proper hearing conservation program is an effective means of dealing with elevated noise levels.

Steel Size (Hex) - Chuck End

MetricU.S.
Bore Diameter68 mm2.677 in
Stroke Length1295 mm51 in
Thrust230 kg at 6.2 bar506 lb @ 90 psi

Mounting Option

OptionMuffledLengths/StrokesWater Valve
JacklegWith or Without3 Airleg options
StoperWith or Without3 Airleg optionsWith or without
SinkerWith or Without

Base Options

Sinker Conversion Kit
S250 Drill Repair Kit
Football Lubricator
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