L-705 Bore Laser

L-705 Bore Laser


The L-705 Bore Laser is a battery-operated, diode laser that mounts magnetically in a mounting fixture or customer-supplied jig.  It is generally recommended for medium-accuracy, shorter-distance bore alignment applications, such as extruders and hinge line (spherical bearing) bores. 

The L-705 has 2 mounting reference diameters:  a mounting stud or “nosepiece” that is .7498 in. (19.04 mm) in diameter and a larger mounting diameter of 2.2498 in. (57.14 mm). The laser beam is concentric to both mounting ODs to within .0003 in. (0.0075 mm).

Micrometers on the back of the L-705 provide precise pointing (angular tilting) control over the laser beam. An operator can adjust the vertical or horizontal angle of the laser beam within .00003 in./ ft. (0.0025 mm/m) relative to the laser housing. 

The L-706 Laser is used for longer-distance applications, such as engine block and compressor bores, and has 3 times higher angular-pointing resolution as the L-705.  Both lasers can be used up for applications up to 100 feet (30.5 m) from the laser.

The L-706 will operate for up to 8 hours on a battery pack with standard, replaceable 9-volt cells.  An AC adapter is provided for continuous operation.


Bar-turning machines
Bore alignment of:

  • Extruder barrel to gearbox alignment
  • Gas and steam turbine bores and half bore
  • Hinge line alignment
  • Cylinder straightness
  • Gun barrel straightness for artillery and naval guns
  • Helicopter tail rotor bearing bores
  • Hinge-line spherical bearing bores when used with our customized bore adapters
  • Stern-tube and shaft-bearing bores in ships


  • Visible laser beam with collimated 5 mm beam
  • Virtually instantaneous warm-up
  • Portable, battery-operated, compact, rugged design
  • Built-in horizontal and vertical angular adjustments for quick alignment of laser beam to bore reference
  • Long-range, high accuracy can be used up to 100 feet (30.5 m)
  • Beam straightness of ± .0001 in. (0.0025 mm) in 10 feet (3 m) or ± .001 in. (5 mm) in 100 feet (30.5 m)
  • Complete system weighs less than 15 lbs
  • Portable, battery operated
  • Target uses light-weight, customized, self-centering bore adapters
  • Targets provide dynamic or live display of component misalignment
  • Target and adapter options to measure bores down to .25 in. (10 mm)


See Dimensions
1.2 lbs (0.5 kilograms)
9V external battery pack/AC adapter
Optional: 10,000 mAh Rechargeable LiPO battery.
.7498 in. (19.04 mm) OD - nosepiece
2.2498 in. (57.14 mm) OD - housing
Laser aperture ground concentric within .0003 in. (0.0075 mm)
Angular Adjustment:
Horizontal and vertical axes controlled by 2 micrometers.
Angular Adj. Range:
± 0.18º (+/-.0375 in/ft. or ± 3.13 mm/m)
Angular Adj. Resolution
.00003 in/ft. (0.0025 mm/m)
Operating Distance:
100 ft (30.5 meters)
Laser Beam Diameter:
.20 in. (5 mm)
< 0.9 mW
Laser Wavelength:
670 nanometers
Aluminum flange, 440 stainless steel
All mounting surfaces:
Hardened and ground (54-60 Rockwell)