4600 Series
14" Vertical Beam Optical Comparator

4600 Series


This is our top-of-the-line 14" benchtop vertical beam optical comparator. The 4600 offers a 4" x 8" measuring stage travel plus an available 4" x 12" option. It features a 3-position lens turret and S-T's exclusive Gothic arch bearing ways which provide the best in accuracy and longevity.


  • High precision 4" x 8" or 4" x 12" measuring stage travel with .00005"/.001mm resolution precision glass scales. Quick release with fine adjust on X-axis.
  • Hardened steel, precision ground bearing ways
  • Choice of QuadraChek® or Metlogix digital readouts.
  • Quick change mount for factory preset magnification lenses in 3-position lens turret.
  • Tungsten/halogen profile illumination for bright, sharp images at all magnifications.
  • Duplex fiber optic surface illumination.
  • Digital screen protractor with readings to 1' or 01°.
  • Available with motorized, joystick-controlled stages.
  • Available CNC option.

Optional Magnification Lenses

  • 5x Magnification
  • 10x Magnification
  • 10x Magnification with long focal distance
  • 20x Magnification
  • 20x Magnification with long focal distance
  • 25x Magnification
  • 311/4 x Magnification
  • 50x Magnification
  • 621/2 x Magnification
  • 100x Magnification



  • 4600-series-specs-smallWork Table: 10" x 14" (250 mm x 350 mm) or 10" x 18" (250 mm x 450 mm)
  • Measuring Range: 4" x 8" (100 mm x 200 mm) or 4" x 12" (100 mm x 300 mm) with quick release on X-axis
  • Measuring Stage Resolution: .00005"/.001 mm
  • Allowable Work Load: 25 lb
  • Illumination: Profile - 150 W, Surface - 100 W
  • Focus Travel: 4"
  • Screen Size: 14" diameter with 30-, 60- and 90-degree crosslines
  • Digital Screen Protractor: 1 min/.01° arc
  • Floor Space: 19" x 29"
  • Electrical: 100/240 V, 50/60 Hz
  • Weight: 280 lb (127 kg) - Crated 410 lb (186 kg)

Quote Request

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Catalog #Description
20-4600-00 Comparator

Optional Digital Readout Measuring Stages

Black Anodized Measuring Stage with 4"X8" Travel, 10"X14" Top Plate or a 4"X12" Travel Stage with 10"X18" Top Plate. Threadless Lead Screw on Cross Travel with Quick Release. .00005"/.001MM Resolution Glass Scales.

Catalog #Description
20-4648-01 4"X8" Stage with QC 121 DRO
20-4648-02 4"X8" Stage with QC 221 DRO
20-4648-03 4"X8" Stage with QC 221E DRO with Edge Sensing
20-4648-05 4"X8" Stage with QC 5215 DRO with Edge Sensing
20-4648-72 4"X8" Stage with M2 DRO
 20-4648-73 4X8" Stage with M2E DRO with Edge Sensing
 20-4649-01 4"X12" Stage with QC 121 DRO
 20-4649-02 4"X12" Stage with QC 221 DRO
 20-4649-03 4"X12" Stage with QC 221E DRO with Edge Sensing
 20-4649-05 4"X12" Stage with QC 5215 DRO with Edge Sensing
 20-4649-72 4"X12" Stage with M2 DRO
20-4649-73  4"X12" Stage with M2E DRO with Edge Sensing

Magnification Lenses

Catalog #Description
20-0320-01 5X Magnification Lens
20-0310-00 10X Magnification Lens
20-0310-05 Long Focal Distance 10X Lens
20-0313-00 20X Magnification Lens
20-0312-00 Long Focal Distance 20X Lens
20-0315-00 25X Magnification Lens
20-0317-00 31 1/4X Long Focal Length Lens
20-0318-00 50X Magnification Lens
20-0319-01 62 1/2X Magnification Lens
20-0321-01 100X Magnification Lens

Options And Accessories

Catalog #Description
20-0311-00 Green Filter
20-1406-02 Heavy-Duty Console Base
20-1411-00 Standard Console Base
*20-1412-00 Optional Lockable Side Drawer for 20-1411-00 Console
20-3512-00 Telecentric Stop
20-3633-01 Matched V-Block with Centers for 8" Stage Travel
20-3633-03 Matched V-Block with Centers for 12" Stage Travel
20-4509-00 Heavy Duty Dust Cover - Replacement
20-4630-00 Replacement Glass for 4"X8" Stage
20-4630-01 Replacement Glass for 4"X12" Stage
20-8614-08 Right Angle Plate/Datum Bar for 4"X8" Stage
20-8614-12 Right Angle Plate/Datum Bar for 4"X12" Stage
20-8614-20 Fixture Adapter Plate for 4"x8"
20-8614-21 Fixture Adapter Plate for 4"x12"
20-4650-00 Rotary Top Plate with Graduations
20-4650-01 Rotary Top Plate less Graduations
48-7271-00 Replacement Lamp, Profile Illumination
48-7747-00 Replacement Lamp, Surface Illumination
74-0321-10 10" Glass Magnification Scale, Certified
74-0413-00 Ball Checker, Certified
74-0426-14 Replacement 14" Glass Screen
74-0500-00 Stage Calibration Master, Certified

*Can be easily field installed with 4 mounting screws at a later date.

Motorized Stage Option

This Option Provides Motorized Movement of X and Y Axis. Included is a 2-Axis Joystick, Fine Position Jog Knobs, Stepper Motors and 2-Axis Driver. This Option is Available with Any of the DRO Options Above. This May be Upgraded in the Future to CNC Control.

Catalog #Description
20-4648-30 2-Axis Motor Drive Option, 4"X8" Travel Stage
20-4649-30 2-Axis Motor Drive Option, 4"X12" Travel Stage

CNC Comparator

CNC Motor Control Options include Joystick Control of Stage Motion and Fine Position Jog Knobs for Exact Positioning. Also includes Optical Edge Detection and CNC Motor Drive System for Automatic Measurement. M2E DRO provides easy to use, programming control and fixed reporting capability. Includes all feature types (point, line, circle, arc, distance, angle and skew), tolerancing and single feature graphic display. QC5215 DRO is a PC based readout system with CAD-Like User Interface and Unlimited Feature and Part Program Storage. Features complete graphical part display, as well as comprehensive reporting capability.

Catalog #Description
20-4800-01 CNC 4800 with QC5215 DRO with Edge Sensing, 4"X8" Stage
20-4800-23 CNC 4800 with M2E DRO with Edge Sensing, 4"X8" Stage
20-4801-00 CNC 4800 with QC5215 DRO with Edge Sensing, 4"X12" Stage
20-4801-23 CNC 4800 with M2E DRO with Edge Sensing, 4"X12" Stage

NOTE: Above systems include optical comparator body.