L-708 Bore Alignment Laser

The L-708 Standard and L-708LD Long Distance Bore Lasers are the latest addition to the bore alignment family of lasers. With the new coarse and fine adjustment capabilities, the L-708 is able to expand the range of adjustment to make setup easier and faster and require less precise fixturing. The L-708LD is a long distance version of the L-708 for applications up to 200 feet (61 m). The L-708 can be used out to 100 feet (30.5 m).

Both lasers have a mounting surface with a 1.2498 in. (31.74 mm) OD. The laser beam is centered to the mounting OD to within .0004 in.(0.010 mm).

High-pitch adjustment knobs adjust the pointing control of the laser beam down to .000007 in./ft. (0.0006 mm/m), so the vertical or horizontal angle of the laser beam can be adjusted to find the center of the reference bore target.

Both lasers 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.

  • Automotive, Marine & Locomotive Engine Blocks
  • Crankshaft and camshaft line bores.
  • Cylinder straightness.
  • Deep bore straightness checks on parts.
  • Propeller shaft bearing bores.
  • Stern tube alignment.
  • Gearbox installation in new ships.
  • Visible laser beam with collimated 5 mm beam for L-708. L-708LD has collimated 10 mm beam
  • Virtually instantaneous warm-up
  • Portable, battery-operated, compact, and rugged design
  • Built-in horizontal and vertical angular coarse and fine adjustments for quick alignment of laser beam to bore reference
  • Long-range, high accuracy.
  • L-708 can be used up to 100 feet (30.5 m)
  • L-708LD can be used out to 200 feet (61 m)
  • Beam straightness of +/- .0001 in. (0.0025 mm) in 10 feet (3 m) or +/- .001 in. (0.025 mm) in 10 feet’ (30.5 m)
  • Bore target and laser use A-514 Self-Centering Bore Adapters with adjustable legs to fit any bore diameter in the range of the A-514 adapters from 3.75 to 40 in (95 to 1,000 mm).  A-514GS/GL Leg-Setting Gage centers adapters to .0003 in. (.0075 mm)
  • Readouts and targets provide dynamic or live display of component misalignment
  • Wireless transmission of alignment data via 2.4GHz link to Bore9 Alignment Software
See Dimensions
1.6 lbs (0.7 kilograms)
9V external battery / AC adapter
Beam Concentriciy
Laser aperture ground concentric to within .0003 in. (0.008 mm). No adjustment
Angular Adjustment Resolution
Coarse: .0006 in/ft (0.05 mm/m)
.000007 in/ft (0.0006 mm/m)
Angular Adjustment Range
Coarse: ± 1.0° (.21 in/ft or 17.5 mm/m)
± 0.03° ( .007 in/ft or 0.6 mm/m)
Operating Distance
L-708: Up to 100 feet (30.5 m)
L-708LD: Up to 200 feet (61 m)
Laser Beam Diameter
L-708: < .25 in. (6.4 mm) dia.
L-708LD: <.38 in. (9.6 mm) dia.
Laser Type
Laser < 1 mW Class II. Blinking and Continuous Modes
Laser Wavelength
635 nanometers
Aluminum Flange. All mounting surfaces: 303 SS

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