S-640 4-AXIS Coupling Alignment System [DISCONTINUED]

S-640 4-AXIS Coupling Alignment System [DISCONTINUED]

The S-640 Coupling Laser Alignment System has been designed for those with limited budgets but with high accuracy needs. It uses a single diode laser with the T-266 4-Axis Coupling Target and has been a workhorse for coupling alignment since it was introduced in 1992. It has newly designed brackets and computer interface that is 4 times smaller and is 5 times more accurate than the previous model. It also uses our new Windows-based Coupling4 software, featuring large, color graphics and color reports.

L-740 Laser

The L-740 laser is a low powered, single-beam visible-light Class II laser. It operates on a 9V rechargeable battery that lasts up to 8 hours on a single charge. The visible light requires no special viewing devices, allowing easy setup and rough alignment. It features an on/off switch that covers the optics when not in use.

T-266 Target

The T-266 is a 4-axis target that simultaneously displays horizontal and vertical center and angle readings. It also has an internal rotation sensor that automatically tells the software what clock position the laser is in. It produces accurate results with as little as 90 degrees of rotation. A metal shield protects the target optics when not in use.

R-358 Computer Interface

The R-358 computer interface, our newest generation of interfaces, provides high accuracy (.00002” or 0.0005 mm resolution) for downloading live target data into the Couple4 Software. It attaches to the computer with an RS-232 cable, is powered by a lithium ion battery for long life and usage, and automatically turns on when the target starts taking measurements. An AC adapter/charger is provided, and the unit features “charging” and “power” LED indicators.

A-907 Bracket Set

These aluminum and stainless steel dual-post mounting brackets feature quick-set speed nuts for nearly instant setup and can accommodate shaft diameters from 0.5? to 5? (12.7 mm to 127 mm) with standard chainless bracket, and shaft diameters from 5? to 12? (127 mm to 305 mm) the with chain attachment. With extra chain links it can accommodate up to 18? (457 mm) of shaft diameter. It has built-in magnets for shafts with large flanges, such as turbine rotor couplings.

  • Target provides 4-axis dynamic display of shims and moves.
  • Uses windows-based software with large, color graphics to display misalignment.
  • Target has a resolution of .00002? (0.0005 mm) for center and .00012?/ft (0.01 mm/M) for angle.
  • Uses quick-set brackets, for 0.5? to 12? (127 mm to 305 mm) diameter shafts, to mount to shafts.
  • System provides coupled or uncoupled shaft alignment capabilities.
  • System has vertical pump capability.
    Software has soft-foot routine.
  • Target rotation sensor automatically adjusts screen for clock position
  • Portable/rugged
  • Up to 30-foot (9.1 M) operational range between laser and target.
  • Reports can be generated in the field with optional PCMCIA Portable color printer.

L-740 Laser



18 oz. (510 g)

Material Case:


Laser Type:

Visible Diode, Class II


670 nanometers



Power Supply:

Rechargeable battery pack (8 hour life)

Operating Distance:

20 feet (6 meters)


3.25 in. square x 2.0 in. (8.25×8.25x5cm)

T-266 Target



4-axis simultaneous


.00002 in. (.0005mm) center
.00012 in/ft (.01 mm/M) angular

Measuring Range:

± 5 degrees angular
± .150 in. (3.81mm) center


3.25 in. square x2.0 in. (8.25cmx8.25cmx5cm)

Cable Length:

10 feet (3.05 meters)

R-358 Computer Interface



3.33 in. W x 1.20 in. H x 5.25 in. D (84.6 mm x 304.5 mm x 133.4 mm)


12 oz (249.5 grams)


3.5 V, 1350 mAh lithium ion rechargeable battery

Battery Life:

8 hours continuous operation

A-907 Bracket Set



0.5 in. width (12.7 mm) with magnetic attachments for coupling flanges, etc.

Shaft Range:

Standard bracket set: 3/8 in. diameter to 5 in. diameter (9.5 mm to 127 mm)
Link Chain Clamp Set: 5 in. diameter to 12 in. diameter (101.6 mm 304.8 mm).
Can accommodate shafts up to 18 in. diameter (475.2 mm) by adding additional chain.

Fixture Rods:

(4) 6 in. long (152.4 mm)
(4) 12 in. long (304.8 mm)

Chain Type:

#35 roller chain, 3.3 ft. long (1 m)


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" The machine move stage is the most critical step in any alignment. Behind its great graphics, this is where we have seen the very high resolution and accuracy of the system pay real dividends, because the live move data on a Stealth system has proven to be dependable and accurate. I have been very impressed to be able to align a new motor to close tolerances on several occasions with only one alignment measurement, one combined vertical and horizontal live-move correction and a confirmation retest – job done!. Well, you may not always be able to align a machine that fast, but it shows two things: that the condition of the machinery being aligned makes a big difference, and that the Stealth lasers are truly up to the task! " Paul Frecker-ISTecnik

More About Stealth Technology…

The Stealth Series™ range of shaft alignment products are the undisputable best accuracy shaft alignment system on the market today. read more...

Stealth vs. Pruftechnik & Fixturlaser

Couple6 Easy Guide™…

In just 5-Steps Couple6™ software featuring Easy Guide™ navigation leads users to the fastest precision alignment available today. Learn more, and take the Couple6™ tour today.