tools n mesure syudy

Tool combination used for the dimensional inspection of a bearing in a rocker arm

Telescoping gauge and micrometer

Procedure for accurately measuring a small hole (approx. $\frac{1}{4}\,\text{inch}$)

Measure with a small-hole or telescoping gauge, then read the gauge with a micrometer

Tool used to check rotor-shaft alignment or the disk plane of rotation

Dial indicator

Tool used to locate the center of a shaft or cylindrical work

Combination set with a center head

Measurement value represented by one vernier graduation on a micrometer

$$0.0001\,\text{inch}$$

Primary functions of the flute section on a twist drill

Forms the cutting edges and allows chip removal

Tool used to check a valve stem for stretch

Micrometer

Standard included angle for a twist drill used on soft metals

$$90^\circ$$

Standard included angle for a twist drill used on hard metals

$$118^\circ$$

Tool used to measure out-of-round wear on a piston pin

Micrometer caliper

Tool generally used to set a divider to an exact dimension

Machinist scale

Tool used to measure clearance between piston rings and ring lands

Thickness gauge (feeler gauge)

Function of dividers in measurement

They transfer measurements to a scale rather than giving a direct reading

Precision tool used to check or calibrate a micrometer

Gauge block

Tool used to measure crankpin and main-bearing journals for out-of-round wear

Micrometer caliper

Gauge type used to check connecting-rod twist

Thickness gauge

Tool used to check flatness clearance between a surface plate and a narrow surface

Thickness gauge

Tools used to measure outside dimensions of aircraft parts

Outside micrometer or vernier caliper

Primary reason for periodically calibrating a micrometer

To maintain measurement accuracy

Common causes of accuracy loss in a micrometer

Dropping, over-tightening, wear, dirt, or damage to the frame or spindle

Tool used to measure runout, bend, or warpage

Dial indicator

Tool used to measure outside diameter very precisely

Outside micrometer

Method to measure inside dimensions indirectly

Use a telescoping gauge and measure it with a micrometer

Tool used to measure very small clearances or gaps

Thickness gauge

Value of one division on a micrometer thimble

$$0.001\,\text{inch}$$

Value of one small division on a micrometer sleeve/barrel

$$0.025\,\text{inch}$$

Distance moved by spindle during one full revolution of a micrometer thimble

$$0.025\,\text{inch}$$

Precision added to a micrometer reading by the vernier scale

Ten-thousandths of an inch ($0.0001\,\text{inch}$)

Order of addition for reading a vernier micrometer

Sleeve reading + thimble reading + vernier reading

Standard drill point angle measured from the centerline on each side

$$59^\circ$$