JCHADWICK 8400K User Manual Download Page 3

Interchangeable Parts

The eyepiece can be removed 

by grasping with thumb and 

forefinger and sliding in or out 

of the eyepiece sleeve. Care 

should be taken to avoid dirt 

or moisture entering the tube 

when removing eyepiece.

A 10X reticle eyepiece enables 

visual width measurements.  

Width observations are valid 

only at 100X magnification 

(10X Reticle Eyepiece with 

10X Objective Lens).

To change the objective lens, 

turn the focus adjustment 

clockwise until the threads of 

the objective lens are visible 

at the base of the Micrometer. 

Holding the Micrometer body 

firmly, grasp objective lens and 

turn counter-clockwise until 

threads disengage.

100X and 200X magnification 

is recommended for inspecting 

scratch depth, scribe lines, 

blind holes, corrosion pits, 

spurs and other very small 

protrusions or indentations.

40X and 80X magnification

 is 

recommended for inspecting 

transparent materials for 

overall thickness and the depth 

of fractures and imbedded 

bubbles or “seeds”. 

Both the eyepiece and the 

objective lens can be 

removed and replaced for  

levels of magnification from 

40X to 200X. Bases can be 

swapped to accommodate 

different surfaces.

To remove a base, firmly hold 

the Micrometer barrel and turn 

the base counter-clockwise 

until the threads disengage.  

To replace, select desired base 

and thread onto the Micrometer 

body in a clockwise direction. 

DO NOT OVER-TIGHTEN.

The 

tripod

 

base

 is 

recommended for flat surfaces.

The 

quadpod

 

base

 is 

recommended for simple 

curved surfaces.
The 

transparent V-block base

 

is recommended for small 

diameters, outside angles and 

flat surfaces near a recess.  

Four additional bases are 

available, please call for price 

and availability. 

 An 

offset base

 for 

measurements along edges.

 A 

delrin-tipped tripod base

 

for delicate finishes.

 A 

large tripod base

 for parts 

inspection.

 A 

wedge bipod base

 for 

corners and inside angles. 

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