Types of Fillet and Radius Gages

Use And Care Of Handtools And Measuring Tools
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g. Types of Fillet and Radius Gages. The blades of fillet and radius

gages are made of hard rolled steel.

The double ended blades of gage

(figure 202, view A) have a lock which holds the blades in position. The

inside and outside of the same radii are on one blade.

The other gage

(figure 202, view B) has separate blades for inside and outside

measurements. Each blade of each gage is marked in 64ths. Gage A, figure

202, has a range of sizes from 17/64 to 1/2 inch. Gage B, figure 202, has a

range of sizes from 1/32 to 17/64 inch. Each gage has 16 blades.

FIGURE 202.

FILLET AND RADIUS GAGES.

h. Types of Drill Point Gages. The drill point gage (figure 203 on the

following page) consists of a 6 inch hook rule with a 59 head that slides

up and down the rule. The sliding head can be locked at any position on the

rule. The sliding head is graduated in 1/32 inch.

i. Types of Marking Gages. Marking gages (figure 204 on the following

page) are made of wood or steel. They consist of a graduated beam about 8

inches long, on which a head slides. The head can be fastened at any point

on the beam by means of a thumbscrew. The thumbscrew presses a brass shoe

tightly against the beam and locks it firmly in position. A steel pin or

spur marks the wood. The spur projects from the beam about 1/16 inch.

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