
L56 MSHA Alignment Laser Specifications and Operation Instructions.
Warning 
Do Not Direct The Laser Light Into The Eye! 
Power:       635 nm, Class IlIa Diode Laser 
<5 mw Maximum Output 
2 Size “AAA” Alkaline Batteries 
Battery Life: 12-15 hours continuous 
use 
Range: >500 ft 
MSHA Approval Number: 2G-4022-0  Permissible 
Constructed from solid brass with an "0" ring seal, the L56 Mining 
Alignment Laser is water tight to +1atmosphere. Integral mounting is 
provided for use with spad or other style support. The Laser Beam is 
concentric to the outside diameter of the battery compartment. This 
product is tested for Intrinsic Safety and is MSHA approved for use in 
Methane/Air mixtures only. When properly maintained, it is MSHA 
approved for use with 1.5 volt "AAA" Duracell MN2400 or Eveready E92 
batteries. Replacement of the batteries must be performed in fresh air 
ONLY. When replacing the batteries, the negative end goes into the 
laser first. All positive ends must point towards the switch cap. All 
batteries must be replaced at the same time. Never attempt to reuse 
batteries. Do not mix batteries of different manufacturers or types. 
OPERATION
The laser is shipped with an insulator to prevent the batteries from 
powering the unit and discharging during shipment and storage. It must 
be removed from the under the switch cap prior to use. To remove it, 
unscrew the switch cap completely, remove the cardboard insulator and 
replace the switch cap. Operation of the laser is simple and 
straightforward. Two hanging brackets with adjustable tabs are integral 
on the laser top and are used to suspend the laser from two spads or 
some other means of sturdy roof support. Bailing wire, chain, rope or 
other means of suspension can be used to hang the laser and provide a 
means of adjusting for elevation. This laser has sufficient mass to help 
prevent it from swaying in entries with high airflow. The end cap is turned 
in the clockwise direction until the laser is powered. Do not over tighten. 

Turn in the counterclockwise direction to turn the unit off. When the laser 
fails to power up, the batteries will need to be replaced. To replace the 
batteries, unscrew the switch cap completely, remove the old batteries 
and inspect the interior of the battery compartment for signs of dirt, 
moisture or leakage from the batteries. Correct any problems with acid 
leakage or case sealing before installing new batteries. Replace the 
batteries in fresh air ONLY. When replacing the batteries, the negative 
end goes into the laser first. All positive ends must point towards the 
switch cap. All batteries must be replaced at the same time. Do not 
attempt to reuse batteries or mix batteries of different manufacturers or 
types. Other than the batteries, there are no user serviceable parts on 
the laser. This product is warranted for a period of one year from the date 
of purchase for manufacturing defects. The manufacturer reserves the 
right to repair or replace this product if it fails due to manufacturing 
defects during the warranty period. Abuse, neglect or disassembly of  
the laser voids this warranty. Like any other tool, the service that this  
product will provide is dependent on the care it receives. Please return it 
to your nearest Mine Supply Dealer for service and repair. 
Model L56 MSHA      L56 Alignment Laser complete with   
        2 AAA Alkaline Batteries . 
Model CL2000         Optional Cylindrical Lens Line Generator  
  Used with L56 Alignment Laser.    
  Projects a 10 foot line from a distance of  
  100 feet. 
Model 10LD           Optional 10 mw Laser Diode System   
        Used with CL2000 Line Generator. Increases  
        Laser Beam Brightness by a factor of 3. 
Model AP30           Optional Soft Carrying Case 12” Long, Plush  
        Lined and Padded with Full Length Zipper. 
AP354S      Stainless Steel Tabs with Slots for Spad  
  Mounting 
Pointed Thumb Screws 1 Pair of Stainless Steel Thumbscrews that  
  replace adjustable set screws. 
Manufactured by: Laser Tools Co., Inc., 12101 Arch St. 
      Little Rock, AR 72206, Phone 501-562-0900 
  FAX 501-562-0022 
E mail lasertoolsco@lasertoolsco.com
  Web site: http://www.Lasertoolsco.com