A micrometer caliper measuring to this limit is here shown.
The chief thing to be done is to fashion a square stick, and when the caliper shows the approximate diameter, draw crosslines at the ends to find the center.
Illustration: The Jaws of a Vise, If They Are True, Will Make a Caliper Gauge Giving a Perfect Measurement] Homemade Tack Puller A very handy tack puller can be made of a round-head bolt.
By making use of the pattern and the brass gauge, the rod may be given the desired taper and the work will proceed more quickly than if the caliper is alone relied upon to repeatedly check up the work.
A caliper of some kind is a necessity, and while the best is a micrometer, Fig.
Plane with the grain and from the butt toward the tip end, and make frequent tests with caliper and gauge, noting the diameter every 6 in.
It is important to make each of the eight sides as nearly uniform as the caliper and eye can do it.
The adjustment of caliper legs should be such that contact between the caliper points and the work is scarcely, if at all, perceptible.
For what may be termed the length measurements of lathe work it is obvious that caliper gauges, such as shown in Fig.
The pin should be turned about 1/64 inch taper, the small end being made a neat fit to the holes in the caliper legs, and should be made of cast steel properly annealed.
For if in any case the calipers have forcible contact with the work the caliper legs will spring open and will therefore be improperly set.
Upon the surface of the block the caliper leg is held by brads or nails driven around its edge, as shown, or it is obvious screws may be used.
And he didn't like his name, Ebenezer Caliper Spotiswood Meiggs.
The measurement of the foot is taken with a caliper rule similar to that used by a shoemaker; the prisoner is posed standing on his left foot and steadying himself as shown in the illustration.
In measuring the left middle and little finger the back of the caliperrule is used, two small projections being provided on the fixed and sliding arms.
The foregoing is perhaps enough to indicate whether or not the secret of Stradivari, or indeed any of the other Italian masters, great or small, had been discovered by caliper measurement.
This will give you the opportunity to use the caliper to good advantage, and will test your capacity to use them for inside as well as for outside work.
A solid nut caliper can only be adjusted by screwing the nut in or out on the screw, which may be a tedious process if the caliper is to be set from one extreme to the other several times in succession.
The micrometer may be of the caliper form for measuring outside diameters or it may be of the form shown at Fig.
At Left, Special Form of Vernier Caliper for Measuring Gear Teeth; at Right, Micrometer for Accurate Internal Measurements.
The form of caliper shown at B is an outside caliper.
The cylinder bore may be worn out of round, which can only be determined by measuring with an internal caliper or dial indicator even if the cylinder bore shows no sign of wear.
The method of adjusting a spring caliper is shown at Fig.
With a slip nut as shown at G it is possible to slip it from one end of the thread to the other without turning it, and of locking it in place at any desired point by simply allowing the caliper leg to come in contact with it.
The buttons a and c are also set to the correct height from side A{1} by using the height gage, and in proper relation to the central button by using a micrometer or a vernier caliper and measuring the over-all dimension x.
The constant to be subtracted from the caliper reading equals 2 A tan 14 deg.
The remaining rough side is then turned, care being taken when starting the first cut to caliper the width of the disk at several points to make sure that the two sides are parallel.
Another form of caliperfor testing threads is shown at B.
Some mechanics turn notches or grooves at the beginning and end of the tapering part, having diameters equal to the largest and smallest part of the taper; the work is then set by these grooves with a caliper tool.
Setting Work for Taper Turning by use of Caliper Gage] Another and more accurate method of testing tapers is to apply a thin coat of Prussian-blue to one-half of the tapering surface, in a lengthwise direction.
If we assume that the caliper jaws bear on the sides of the tool at a distance A from the top, equal to 1/4 inch, then the width of the tool point equals the caliper reading (as shown by the horizontal scale) minus 0.
Very often fixed caliper gages C are used instead of the adjustable spring calipers.
Figure 5 shows a 12-inch rule with a slide caliper jaw.
A handy slide caliper shop rule is made with a slide marked in fractions of inches as shown in the drawing.
It is a 26-inch caliper, and willcaliper up to 34 inches diameter.
Combination Caliper and Divider] Attachment for Vernier Calipers While vernier and slide calipers are very handy shop tools, their usefulness is much more limited than it ought to be for such expensive instruments.
Method of Setting Dividers Accurately] Combination Caliperand Divider The combination caliper and divider shown in Fig.
Micrometer Caliper Square] The barrel is graduated in fifty divisions, each division equaling 0.
The design of the micrometer beam caliper shown in Fig.
Then remove the caliperand measure the distance between the caliper points.
A still better way is to have two short pins, CC' set in the sides of the inside caliper legs, but this is not readily done as a makeshift.
The usual large caliper supplied by the average machine shop is so cumbersome and heavy that this one was designed to fill its place.
In the upper left-hand part of the engraving the details of a useful addition to the caliper are shown.
Large Double-jointed Calipers] Kinks in Inside Calipering Close measurements may be made by filing two notches in each leg of an inside caliper so as to leave a rounded projection between, as shown at E, Fig.
The design must be worked out by eye, because of the nature of the work no caliper measurements can be made for depth of cuts.
For all diameters on tapers the calipers should be set 1/16" larger than the desired measurement in order to avoid working under size in the finishing cut which removes all caliper marks.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "caliper" in a variety of sentences. We hope that you will now be able to make sentences using this word.
