L-706 Bore Laser System

Hamar Laser’s L-706 Bore Laser Alignment System is highly accurate and unparalleled for ease of use. It can handle a wide range of bore alignment and straightness applications. Even extremely difficult bore alignment jobs, such as spherical bearings, can be done easily. The L-706 may be used at distances up to 100 feet, and is recommended for applications with higher pointing-accuracy requirements, such as engine block bore alignment. The L-705 is recommended for applications with lower pointing-accuracy requirements, such as extruder barrel alignments or aerospace hinge lines.

System Highlights

  • Fast: 15-minute setup time. Measure each bore in seconds!
  • Easy: Unique self-centering adapters are easy to insert into tight spaces and do not need to be inverted (0° & 180°) to calculate results.
  • Simple to learn: Use simple X-Y readouts to view the data. No “black boxes” needed!
  • Versatile: Many target and adapter options for bore diameters from .250 in. (10 mm) to 40 in. (1 m) or more.
  • Bore9 Software: Record bore alignment, calculate straightness results and print reports using optional Windows-based Bore9 Software.

Key Features

  • 15-minute setup time. Measure each bore in seconds.
  • L-706 Operational Range: 1 to 100 feet (0.2 to 30.5 m).
  • Angular adjustment resolution of .001 in. in 100 ft (0.025 mm in 30 m)
  • A-514A,B,C Self-Centering Bore Adapters are easy to insert into tight spaces and do not need to be inverted (0° & 180°) to calculate results.
  • Adjustable legs fit a large range of bore diameters from 3.75 to 40 in. (95.3 mm to 1 m) or more.
  • A-514GS Leg-Setting Gage centers adapters to .0002 in. (0.005 mm).
  • R-1307 Readouts with .00001 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 alignment data, analyzes the results and prints reports.
  • Optional small-bore targets can align bores as small as .250 in. (10 mm).
  • Optional spherical-bore target with Virtual-PSD™ technology comes with customized bore adapters for easy and fast alignments.
  • Durable 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.



  • Hinge-Line Spherical Bearing Bores

Automotive, Marine & Locomotive Engine Blocks

  • Crankshaft and Camshaft Line Bores
  • Cylinder Straightness

Manufacturing & Metalworking

  • Boring Bar Bearing Alignment
  • Deep-Bore Straightness Checks on Cylinder Parts
  • Workpiece Bore-to-Spindle Alignment


  • Propeller Shaft Bearing Bores
  • Stern Tube Alignment


  • Artillery Gun Barrel Straightness Checks


  • Extruder Barrel Alignment
  • Extruder Bore Straightness and Wear

Power Generation

  • Gas Turbines
  • Steam Turbines

L-706 Bore Laser Alignment System

The L-706 Laser Borescope is unparalleled for ease of use and fast extruder alignments. It is also highly accurate, which can help to triple the life of extruder barrels and screws. With barrels costing up to $5,000 and screws even higher, the L-706 Laser Borescope alignment system can pay for itself very quickly. It can further save money by reducing the electrical consumption of the motor. We’ve had one customer use a forklift to pull out the screw from one extruder and after laser alignment, slide it back in by hand!

Any bore from 1.5″ (38 mm) to 14″ (356 mm) can easily be measured with our L-706 Laser Borescope. The heart of the system is our patented A-510 2-Axis Self-Centering Target that automatically finds the center of the bore with no moving parts. This allows nearly instantaneous bore measurements for alignment or straightness.

Our competitively priced L-705 Laser Borescope system is the fastest and most accurate extruder alignment system on the market. Its patented self-centering target and simple laser fixt

The L-705 Laser Borescope Alignment System

In most cases, an extruder can be completely aligned in less than 1½ hours, including setup! With simplified fixturing and self-centering targets, the alignment system can be set up and misalignment data taken in as little as 10 minutes. And in most cases, bore straightness data can be taken and analyzed in 15 minutes or less using our Bore9 software. Compared with optics that can take 2 hours just to set up, the L-705 can bring your extruders back on line, producing parts in record time.

Simple Fixturing for Fast Setup

The L-706 Laser has been designed with a .750″ (19 mm) mounting stud and flat face with magnets to hold it flush to fixturing. Since the laser beam is concentric to the OD to within .0005″ (0.01 mm), a simple flat face and .750″ (19 mm) hole on center is all that is needed to hold the laser (the extruder package includes a self-centering chuck fixture). In fact, the laser replaces the first reference target that a typical borescope would need.

Long-Distance Measuring

With finer angular adjustment, the L-706 is designed for use in long-distance applications, i.e. from 45 feet (14 m) to 110 feet (33 m). The laser beam can be adjusted to .001 in. in 100 feet (0.025 mm in 30 m).

Replaceable Adapter Legs for Each Barrel ID

Give us each extruder barrel ID and we make a set of legs customized to that ID. The legs insert into the A-510STA or A510LTA Bore Adapter Hubs to self-center the target in the barrel.

Patented, Self-Centering Target Bore Adapters

Hamar Laser has developed the world’s first self-centering target (A-510)and bore adapter(A-510STA/A-510LTA)that uses no moving parts. It takes just seconds to position the target in the barrel for an accurate measurement down to .0005″ (0.01 mm). See How the Alignment System Works for more information.

Barrel Wear Measurements

TheA-510STA (or LTA) Bore Adapter can be placed on the A-510 Target in two ways. With the adapter placed on the target in Self-Centering Mode, it will center itself into the barrel. By inserting the A-510STA (or LTA)in Measuring Mode, the adapter will measure diameter changes in the bore. To measure barrel wear/diameter changes, a measurement is taken with an inside micrometer of a reference bore, usually at the free end of the barrel. The target and adapter in Measuring Mode are inserted into the reference bore. A measurement is taken with the target in the NORMalposition and in the INverted position. The two readings are averaged and the result is the starting measurement for the laser. At each subsequent measuring point, two sets of readings, NORMaland INverted, are taken and averaged. Subtract the result from the reference measurement and the diameter change is produced.