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February 2023

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Self-Centering Bore Alignment System

Hamar Laser Instruments, Inc. has released its upgraded L-703B . The new system uses the L-703B Laser variant of Hamar Laser's compact and versatile new L-703 Laser, which the company introduced in June 2022.

"Hamar Laser's L-703B makes bore alignment easier and up to 75% faster than competing systems," said a company spokesperson. The new L-703B Laser replaces the L-705 Laser for applications where the laser is mounted externally. Smaller and lighter than the L-705, the L-703B works with Hamar Laser's patented, self-centering targets that require only one measurement per bore. Applications include engine blocks, compressor bores, cylinder bores, shaft bearing bores, stern tubes and more.

"In addition to the new bore laser, our L-703B includes our new L-112 Laser Mounting Stand and L-103 Optical Beam Translator," said Rod Hamar, President of Hamar Laser Instruments. "The new laser and accessories facilitate alignments in smaller spaces, speed set-ups and have allowed us to significantly reduce the package pricing. Rounded out with our patented, self-centering targets, there is no better system than the L-703B for high-accuracy bore alignment."

"In addition to being faster and more affordable, Hamar Laser's new L-703B offers a resolution of .00004 in. (0.001 mm) and much higher accuracy and repeatability than competing products," said the spokesperson. "It is also easier to use and requires less training. A bore alignment survey takes only 15 minutes."

Hamar Laser's L-703B includes these design upgrades:

  • Smaller and lighter-The new design reduces both the size and weight of the laser.
  • Adaptable to other applications-With different accessories and a firmware upgrade, the L-703B can be adapted to several other applications, such as extruder alignment, guideway alignment and lathe and spindle alignment.
  • Internal rechargeable battery-The L-703B now features a built-in rechargeable lithium-ion battery with 11 hours of continuous battery life, which replaces the older L-705 Laser's external battery pack.
  • New laser mounting stand-The new L-112 laser mounting stand is significantly improved over the previous L-111 stand, and now offers horizontal coarse translation and vertical angular adjustment, which speed laser set-ups.
  • New optical beam translator-The new L-103 optical beam translator is easier to use than the L-102 translator, its predecessor, and is smaller, making it easier to fit the L-703B and L-103 into tight spaces.

The L-703B Laser supports Hamar Laser's entire series of 2-axis cabled bore targets when used with the company's R-1307 readouts, and supports Hamar's R-358 computer interface when used with those targets.

For more information contact:

Hamar Laser Instruments, Inc.

5 Ye Olde Road

Danbury, CT 06810


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