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Digital Optical Micrometer
for Scratch Width & Depth
Model 8400K
A time-saving tool for measuring the width of
scratches and vertical depth of surface features.
Scratch Depth Measurement used to be an art. Now you can do it in less
than 20 seconds.
Repeatable
Results ●
Save Time ●
Save Parts ●
Eliminate Guesswork
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The 8400K Digital Optical
Micrometer is a unique coating and surface inspection tool that offers speed, precision,
and repeatability. This time-saving tool was designed specifically for
measuring the width of scratches and vertical depth of surface features.
"Visual inspection" is standard for any component with scratch or
corrosion pit damage, and maximum allowances are often specified. Other
methods of visual inspection are time consuming and inconclusive.
The 8400K lets you measure the width of
scratches using the reticle eyepiece and vertical depth of surface
features, usually to evaluate the severity of mechanical damage such as
scratches, corrosion, pits or blemishes difficult to observe by other
methods. Accurate measurement is essential to determine whether a part
should be kept in service, and the 8400K brings remarkable precision and
integrity to this judgment process.
The 8400K is designed for use in the
field. The sealed, non-magnetic case is dustproof and shock-resistant to
withstand everyday shop use.
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Inspection for
Scratches, Corrosion & Wear
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Depth
allowances are often specified, but proper measurement is needed to
determine if a part should be kept in service. The 8400K performs this
task quickly and easily, where other methods are time consuming and
inconclusive.
Measurement Technique:
First, focus on a smooth surface next to a scratch.
Then, zero out the digital display (you can choose a readout in either
inches or millimeters). Next, focus on the bottom of the scratch. The
digital display shows depth relative to the surface. "Floating Zero"
means that no arithmetic is necessary to arrive at the result. If you
can focus, you can perform cost-saving, accurate measurements of surface
damage to mechanical parts.
Applications:
Coated surfaces, windshields and other
transparent materials may be measured for overall thickness, depth of
crazing, and depth and width of imbedded bubbles or seeds as well as
scratches. Shafts, couplings, airframes,
masts, castings, windshields, fuselage skin (pitot tube area), leading
edges, paint, turbine blades, fuel pump gears, props, rotor blades,
sealing surfaces and much more.
Options: The 8400K
can output to a printer with Statistical Process Control (SPC), or be
linked to a PC. These options provide hard copy for documentation,
traceability, and trend monitoring.
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| Accuracy
& Resolution |
In
inches:
The digital readout shows four places right of the decimal: "0.0000".
The far right (ten-thousandths) reads "0" or "5" (0.0000 or 0.0005).
Accuracy: 0.001"
Resolution: 0.0005" |
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In
millimeters:
The readout shows "0.00". The far right (hundredth of mm) place reads in
0.01 mm increments.
Accuracy: 0.01 mm
Resolution: 0.01 mm |
| Depth &
Width of View |
With 10X
objective lens:
Vertical range (or depth): 0.250" (6.4 mm) from surface to bottom of
scratch.
A width of 0.040" (1.0 mm) can be measured with reticle eyepiece. |
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With 4X
objective lens:
Vertical range (or depth): 1.250" (32 mm)
A width of approximately 0.150" can be viewed (but not measured). |
| Weight |
Kit in hardwood
case: 5.0 lbs
Micrometer only: 1.5 lbs |
| Dimensions |
Hardwood case: 16" x 7" x 5"
Micrometer only: 2" dia. x 9" height (3" dia. at base) |
| Reticle
Eyepiece |
Accuracy:
±0.001"
(±0.02
mm)
Resolution: ±0.001"
(±0.02
mm)
Width: 0.040" (1.0 mm)
Measured surface must be perpendicular to micrometer.
Use only 10X objective lens with reticle eyepiece. |
System Components
The Mi8400K crometer kit fits securely into a
custom hardwood carrying case (dimensions 16" x 7" x 5") and weighs only
5 lbs. There are 12 basic pieces in the kit:
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1.
Micrometer with Digital Display
2. 3-leg base
3. 4-leg base
4. Clear base
5. 4X Eyepiece
6. 4X Objective
7. 10X Eyepiece
8. 10X Objective
9. Flashlight with spare batteries
10. Allen wrench
11. Scratch test plate
12. Wooden case |
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Options
The 8400K Micrometer can download
data to a small printer or to your PC. These capabilities are important
for keeping documentation and traceability procedures, and for
monitoring trends.
DP-1HS Digimatic
Mini-Processor & Printer
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This is the most popular 8400K
option. A one-meter cable connects the 8400K to this instrument,
which is capable of printing, storing and processing measurement
data. Tolerance judgments, statistical results and histograms may be
printed. When limits are set, up/down arrows appear for exceeded
limits. There are several types of printouts to choose from.
Readings can either be printed in the order they are taken, or
plotted according to their magnitude in a number of statistical
chart formats.
- Weight: 1.1 lbs.
- Dimensions: 7.1" X 6.3" X 3.2"
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Input Tool for
Personal Computers
Two cables allow data to be sent to a
spreadsheet program such as Excel. Measurements are entered with just
one touch of a data button. No battery or AC power is needed, and
laptops can be used. The cables have small interface boxes in the
middle. One cable connects via the keyboard input port (keyboard is
disabled), the other through the RS-232 port.
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 Dimensions
(both styles):
- Cable Length: 40"
- Total Weight: 87g
- Center Box: 2.4" X 1.5" X .9"
- RS-232 Cable :
P/N 264-005
- Keyboard Cable: P/N 264-007
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