L-702/L-702SP 4-Axis Spindle Alignment

L-702/L-702SP 4-Axis Spindle Alignment


The L-702/L-702SP are Class II diode lasers designed primarily for alignment of spindles to sub spindles or tailstocks. They have 2 axes of angular adjustment to align the laser beam to be co-linear the axis of rotation of a spindle in which the unit is mounted.  The L-702SP variant can also be used for CNC machining centers, milling machines and gantries.

The L-702 Spindle Laser comes in 2 configurations:

  • L-702 Spindle Alignment Laser – is a straight-line laser for spindle alignments in lathes, turning centers, OD grinders, slant-bed lathes and transfer-line and rotary-dial machines.
  • L-702SP Spindle Alignment Laser with Scan Plane – this adds a perpendicular scan plane to the L-702 spindle laser beam for checking cross-slide, turret-axis squareness and other milling axes in multi-axis, mill-turn machines and can also be used on horizontal and vertical CNC machining centers.



  • Rotary-Dial Machines
  • Transfer-Lines

 Bore Alignment

  • Bore parallelism
  • Compressor-bore squareness and concentricity

Machine Tools

  • CNC Machining Centers and Milling Machines
  • CNC Gantries and Floor Mills
  • Cylindrical, OD/ID Grinders
  • Horizontal Boring Mill Indexing Checks for Deep-Bore Applications
  • Lathes and Turning Centers
  • Multi-Turn Machining Centers
  • Rotary-Dial Machines
  • Transfer-Line Spindle Alignments


  • Twin-Barrel Extruders


  • The laser and target both offer a .500 in. (12.7 mm) mounting stud for simple fixturing to hold them in place.  
  • Center resolution of .00001 in. (0.00025 mm) and angular resolution of .00001 in/ft (0.0008 mm/m).
  • Live measurement data in 4 axes (V center, V angle, H center & H angle) simultaneously.
  • Windows 7/8/10-based Lathe9 Software with large, color graphics corrects mounting errors, calculates shim values and provides an alignment report showing all the alignment parameters of lathe alignment.
  • Windows 7/8/10-based Spindle8 Software with large, easy-to-see alignment displays, live alignment data and spindle graphics, and a 4-step procedure guide users through aligning spindles to master parts on transfer-line spindle applications.
  • L-702/L-702SP mounts in the spindle to project its axis of rotation out to 100 ft (30 m).
  • Vertical and horizontal angular adjustments  to precisely adjust the laser to the spindle’s axis of rotation.
  • With optional L-702SP Magnetic Base, the L-702SP can be mounted on a machine table or instrument stand for checking milling machines and similar machines.
  • Rechargeable LiPo battery runs the lasers for up to 8 hours.
  • Compact and rugged 4 x 2.9 x 1.7 in. (101 x 74 x 45 mm). 
  • Only needs 10 in. (254 mm) of space between spindle and tailstock or sub-spindle.


L-702: 18 oz (510g)
L-702SP: 24 oz. (680 g)
Aluminum + Stainless Steel
Standard Mount:
.500 in (12.7 mm) diameter mounting stud - can be replaced. 440C stainless steel, RC54-58 hardness
CLASS II 635 nM, 4 mm diameter
Laser power < 0.9 mW
Power Supply:
Internal 3.4-volt rechargeable Li-PO battery
Laser Adjustment Range:
Up to 50 ft. (15 m), measurements can be taken to 100 ft. (30 m)
Beam Angular Adjustment Range:
± 2.0°
Adjustment Resolution:
± .000025 in/ft (0.002 mm/m)
Operation Modes:
Laser Beam Only
Laser Plane Beam (requires prism to be flipped into laser beam)
Laser Scan Plane - Auto Rotation (requires prism to be flipped into laser beam)
L-702SP Laser Plane Flatness:
0.5 arc secs (.00003 in/ft or 0.0025 mm/m) in 360° sweep
0.25 arc secs (.000015 in/ft or 0.0013 mm/m) in 90° sweep
L-702SP Laser Plane Step Error:
± .00015 in (± 0.003 mm) in 360° sweep
± .00075 in (± 0.0015 mm) in 90° sweep
L-702SP Laser Squareness to Beam:
1.0 arc secs (.00006 in/ft or 0.005 mm/m)