Definition and Parts of a Bevel Protractor

-

Bevel Protractor:

A bevel protractor may be a tool wont to measure the angle of objects. It can typically be seen utilized in conjunction with other tools like jigs when someone is producing engineering or machine drawings. Bevel protractors are different from regular protractors therein the tool is adjusted to suit the angle. To measure employing a bevel protractor you place rock bottom on the bottom side of the angel and move the blade to match the angles opposite side. The vernier bevel protractor may be a precision instrument meant for measuring angles to an accuracy of 5 minutes.

Parts of a bevel Protractor:

Following are the parts of a bevel protractor:

1. Blade
2. Dial
3. Stock
4. Locking Screws

 Bevel Protractor



Blade:

This is the other surface of the instrument that contacts the work during measurement. It is fixed to the dial with the assistance of the clamping lever. A parallel groove is provided in the centre of the blade to enable it to be longitudinally positioned whenever necessary.

Dial:

The dial is an integrated part of the stock. It is circular in shape, and therefore the edge is graduated in degrees.

Stock:

This is one of the contacting surfaces during the measurement of an angle. Preferably it should be kept in touch with the datum surface from which the angle is measured.

Locking Screws:

Two knurled locking screws are provided, one to lock the dial to the disc, and the other to lock the blade to the dial.




Comments

Post a Comment

Popular posts from this blog

Definition and Parts of a Vernier Caliper

-
Image
Vernier Caliper and Its Parts:   Vernier Caliper Vernier Caliper: The vernier caliper is a measuring tool wont to get precise linear dimension measurements. A vernier micrometer is particularly useful to live the diameter of cylindrical objects as its jaws can clamp either side to urge accurate measurements. Main Parts of a Vernier caliper:   1. Upper Jaws or Inside Jaws   2. Lower Jaws or Outside Jaws 3. Depth Rod   4. Main Scale 5. Vernier Scale 6. Lock Screw 7. Thumb Screw 1. Upper Jaws or Inside Jaws: The upper jaws are smaller in size and are attached to the upper portion of the vernier micrometer. Similar to the lower jaws, one of these jaws is fixed and the other is movable. The difference between them and the lower jaws is that the upper jaws are used for measuring inside dimensions of hollow objects such as inside diameters of pipes, lengths and widths of boxes etc. The jaws are placed inside the place to be measured and then opened
Read more

Lathe Machine Operations

-
Image
    Lathe Operations: 1.      Facing: It is an operation of reducing the length of the workpiece by feeding the perpendicular to the lathe axis. This operation of reducing a flat surface on the end of the workpiece. For this operation, regular turning tool or facing tool may use. The cutting edge of the tool should set to the same height as the centre of the workpiece. 2.      Turning: It is the most common type of operation in all lathe machine operations. Turning is the operation of removing the excess material from the workpiece to produce a cylindrical surface to the desired length. The job held between the centre or a chuck and rotating at a required speed. The tool moves in a longitudinal direction to give the feed towards the headstock with proper depth of cut. The surface finish is very good.    Ø Straight Turning: The workpiece is held on the chuck and it is made to rotate about the axis, and the tool is fed parallel to the lathe axis. The straight turning
Read more

Micrometer and it's main parts

-
Image
Micrometer and It's Parts:  Micrometer   Micrometer: The micrometer may be a precision measuring system, employed by engineers. Each revolution of the rachet moves the spindle face 0.5mm towards the anvil face. The object to be measured is placed between the anvil face and the spindle face. The rachet is turned clockwise until the thing is ‘trapped’ between these two surfaces and therefore the rachet makes a ‘clicking’ noise. This means that the rachet can't be tightened anymore and therefore the measurement are often read.   Main Parts of Micrometer: 1.      Main Frame 2.      Zero adjusts screw 3.      Anvil 4.      Spindle 5.      Anvil Face and Spindle Face 6.      Lock Nut 7.      Sleeve 8.      Thimble 9.      Rachet 1.      Main Frame: It’s a c shaped frame as identified within the figure, may be a rigid part that has both holding points for employment or object to be measured. Its size depends on micrometer measuring range so
Read more