Electronic Flatness Gauges
Determine whether a surface’s flatness is within tolerance from an easy-to-read LCD screen. As you slide these gauges across surface plates, lapping plates, and other surfaces, they’ll quickly detect and measure any deviations. They come with a calibration certificate traceable to NIST that states they’ve passed a test for accuracy. Since they have zero-position memory, also known as absolute (ABS) positioning, they’ll retain their measuring position when they’re turned off. A zero-set button allows you to start measuring at any point.
An optional data cable connects the gauge to your PC, so you can save measurements for future reference or analysis. Press the button on the cable to record the current reading.
For technical drawings and 3-D models, click on a part number.
Measuring Range | Measuring Increments | Accuracy | Contact Point | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Min. Surface Lg. | Inch | Metric, mm | Inch | Metric, mm | Inch | Metric, mm | Head Dia. | Lg. | Mount. Thread Size  | Power Source | Batteries Included | SPC Data Output | Features | Certification | Each | |
| 7 7/8" | 0"-0.5" | 0-12.7 | 0.00005" | 0.001 | ±0.0002" | ±0.005 mm | 0.118" | 0.945" | M2.5 | Battery | Yes | Yes | Zero-Position Memory (ABS), Zero-Set Button | Calibration Certificate Traceable to NIST | 0000000 | 000000000 |
| Lg., ft. | Connection Type | USB Connection Type | USB Standard | Each | |
| 8 | USB | A | 2.0 | 00000000 | 0000000 |
| Battery Type | Battery Chemistry | Voltage | Manufacturer Equivalent Number | Pkg. | |
| Disposable | Lithium | 3V DC | BR2032, CR/BR2032, CR2032, DL2032, ECR2032 | 0000000 | 00000 |
Dial Flatness Gauges
Slide these gauges across surface plates, lapping plates, and other precision surfaces and a variance indicator (required but not included with all gauges) helps you determine if their flatness is within tolerance. The variance indicator displays the amount of deviation as you move the flatness gauge.
For technical drawings and 3-D models, click on a part number.
Contact Point | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Min. Surface Lg. | Measuring Range | Measuring Increments | Accuracy | Dia. | Lg. | Manufacturer | Manufacturer Model Number | Each | |
| 9 3/4" | 0"-0.002" | 0.00002" | ±0.00002" | 3/8" | 1/16" | Starrett | 81320, 81850 | 0000000 | 000000000 |
Contact Point | ||||||||
|---|---|---|---|---|---|---|---|---|
| For Min. Surface Lg. | Body Material | Dia. | Lg. | Manufacturer | Manufacturer Model Number | For Mounting Stem Diameter | Each | |
| 9 3/4" | Black-Oxide Steel | 3/8" | 1/16" | Starrett | 81320 | 3/8" | 00000000 | 000000000 |
Dial | Contact Point | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Measuring Range | Measuring Increments | Accuracy | Industry Designation | Mounting Stem Dia. | Dia. | Reading | Head Dia. | Lg. | Manufacturer | Manufacturer Model Number | Each | |
| 0"-0.002" | 0.00002" | ±0.00002" | AGD Group 1 | 3/8" | 2" | 0-1-0 | 1/8" | 1/4" | Starrett | 81850 | 0000000 | 000000000 |
| Material | Manufacturer | Manufacturer Model Number | For Manufacturer Model Number | Each | |
| Vinyl-Coated Wood | Starrett | 81321 | 81320 | 0000000 | 0000000 |
Cases for Dial Flatness Gauges
Protect Starrett dial flatness gauges while storing and transporting them with these specially fitted cases.
For technical drawings and 3-D models, click on a part number.
| Material | Manufacturer | Manufacturer Model Number | For Manufacturer Model Number | Each | |
| Vinyl-Coated Wood | Starrett | 81321 | 81320 | 0000000 | 0000000 |
Optical Parallels and Flats for Micrometers
Inspect micrometer spindle and anvil tips to identify whether they're worn or out of parallel. These discs help you keep your micrometer measuring accurately, especially after repeatedly measuring hard items such as ball bearings. Place them between the anvil and spindle and look at the resulting light pattern on the glass.
Optical parallels determine if your anvil and spindle are parallel. You’ll know your micrometer is out of parallel if the spindle side reflects a different number of lines than the anvil side. Each parallel includes four discs to check each quarter-turn of your spindle and identify where it has worn down.
Optical flats determine if your anvil is no longer flat. If the lines you see are curved, your anvil is worn.
| For Outside Micrometer Size | Dia. | Thick. | Flatness Tolerance | Parallel Tolerance | Number of Parallels Included | Container Type | Each | |
| 0" to 1" | 1 3/16" | 0.5", 0.5062", 0.5125", 0.5187" | 0.000004" | 0.000008" | 4 | Case | 0000000 | 0000000 |
| 1" to 2" | 1 3/16" | 1", 1.0062", 1.0125", 1.0187" | 0.000004" | 0.000008" | 4 | Case | 0000000 | 00000000 |
| 0mm to 25mm | 1 3/16" | 12mm, 12.12mm, 12.25mm, 12.37mm | 0.000004" | 0.000008" | 4 | Case | 0000000 | 000000 |
