L-706 Small-Bore Laser System

Hamar Laser’s L-706SM Small-Bore Laser Alignment System is highly accurate and unparalleled for ease of use. It has been designed to work on very small bore diameter applications to work with our 4×4 mm PSD targets. It is used primarily on short length, small diameter applications, such as heat exchangers, tube-sheet bore straightness measurements and large caliber gun barrel straightness. The L-706SM may be used at distances up to 15 ft (4.5 m).

System Highlights

  • Fast: 15-minute setup time. Measure each bore in seconds!
  • Easy: Customized self-centering bore targets are easy to insert into tight spaces and do not need to be inverted to calculate results.
  • Simple to learn: Use simple X-Y readouts to view the data. No “black boxes” needed!
  • Versatile: For diameters from .75 to 2.0 in. (17.75 to 50.8 mm). Larger bore IDs can be accommodated with our other self-centering bore targets: A-510, A-512 and A-516.
  • Bore9 Software: Record bore alignment and calculate straightness data using Windows-based Bore9 Software, and provide printed reports.

Key Features

  • 15-minute setup time. Measure each bore in seconds.
  • L-706SM Operational Range: 1 to 15 ft (0.3 to 4.5 m).
  • T-220 Customized Self-Centering Bore Targets are easy to insert into small bores and do not need to be inverted to calculate results.
  • Small-bore targets accommodate a range of bore diameters from .75 to 2.0 in. (17.75 to 50.8 mm) or more.
  • R-1307 Readouts with .0001 in. (0.001 mm) resolution update in real time as the bore is adjusted.
  • Add a second readout to transmit readings wirelessly up to 200 ft (61 m).
  • Optional Bore9 Software aids with setup, records bore data and analyzes the alignment results.
  • Optional large-bore targets can align bores from 2 to 40 in. (50.8 to 1,000 mm)
  • Optional spherical-bore “virtual” targets with customized adapters for easy and fast alignments.
  • Durable and rugged, designed to last many, many years of service.

If you do not see your application listed, please contact us to discuss your requirements. We will be more than happy to provide a solution that’s right for your unique alignment problem.


Automotive, Marine & Locomotive Engine Blocks

  • Crankshaft and Camshaft Line Bores
  • Cylinder Straightness

Manufacturing & Metalworking

  • Deep-Bore Straightness Checks on Parts, such as large caliber gun barrels or heat exchanger tube-sheet bores


  • Artillery Gun Barrel Straightness Checks


  • Small-Bore Extruder Barrel Alignment
  • Small-Bore Extruder Bore Straightness and Wear