L-706 Bore Laser

L-706 Bore Laser


The L-706 Bore Laser is a battery-operated, diode laser that mounts magnetically in a mounting fixture or customer-supplied jig.  It is generally recommended for high-accuracy bore alignment applications, such as engine blocks or compressors. 

The L-706 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-706 provide precise pointing (angular tilting) control over the laser beam. An operator can adjust the vertical or horizontal angle of the laser beam within .00001 in./ ft. (0.0008 mm/m) relative to the laser housing.

The L-705 Laser is used for shorter-distance applications, such as extruders and hinge bearings, and has 3 times less angular-pointing resolution as the L-706.  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.


Bore alignment of:

  • Cam, cylinder and crankshaft bores
  • Compressor bores
  • Gas and steam turbine bores and half bore
  • Cylinder straightness
  • Gun barrel straightness for artillery and naval guns
  • 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. (0.025 mm) in 100 feet (30.5 m)
  • Complete system weighs less than 15 lbs
  • 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:
± 0.06º (± .012 in./ft. or ± 1.02 mm/m)
Angular Adj. Resolution:
.00001 in/ft. (0.0003 mm/m)
Operating Distance:
100 feet (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)