Engine Block Bores

Checking an engine block’s bearing bores for concentricity and straightness is difficult and time consuming, especially on large engines using older methods, such as tight wire or optics. It is also very challenging to get good repeatability from operator to operator. Fortunately there is a better way.

L-703B Self-Centering Bore Alignment System

Our 50 years of alignment experience went into the design of the L-703 Self-Centering Bore Alignment System that makes aligning engine blocks easier and faster:

  • Replacing our workhorse bore laser, the L-706, the newly designed L-703B Laser is smaller and lighter than previous models.
  • Also newly the designed L-103 Laser Beam Translator (replaces the L-102) and L-112 Laser Stand (replaces the L-111), are used to hold the laser externally but on center to the bores.
  • Easy-to-use, patented self-centering targets that only require 1 measurement per bore — no 0° and 180° measurements!
  • Setup in as little as 15 minutes; bore alignment data can often be analyzed in 30 minutes or less.
  • Our self-centering targets can easily measure bore diameters from 1.18 to 40 in. (30 to 1,000 mm).
  • Resolution of .00004 in. (0.001 mm) and bore alignment/concentricity accuracy up to .0002 in. (0.005 mm) per 10 feet (3 m).
  • Simple X-Y readouts require very little training, making it the easiest system on the market to learn and use.
  • L-703B runs on a lithium-ion, rechargeable battery with 11 hours of continuous battery life.
  • Optional Windows-based Bore9 Software records data, analyzes the results and produces reports.

Resource Center

L-703B Self-Centering Bore Alignment System Configuration