List of marking tools in workshop are as follows

List of equipment used to mark.

1. Scriber:

Scriber is a sharp-edged tool that is used to draw lines while marking. Their point is grinding at an angle of 12 to 15. According to the Indian Standard 125 to 200 mm. Are found in length.

 

Material:

The scriber is usually made of high carbon steel and its point is hard and tempered.

type:

Often the following types of cuffs are used:

i. Straight Scriber:

One end of this type of scriber is straight and pointed and has a body plane or narling. It is used to draw lines when doing simple marking.

ii. Bent Scriber:

One end of this type of scriber is straight and pointed and the other end is bended at an angle of 90.


Its straight end is used to lay normal lines and the curved end is used for the following tasks:

(A) To place small measurement lines on a job such as 1 mm, 1.5 mm. Etc. (with the help of surface gauge).

(B) To check (with the help of surface gauge) while tying the job to the center in the four jaw check on the lathe machine.

(C) To draw lines on the inner surface of a cylindrical hollow job. Bent type scriber can be used with surface gauges and also separately.

iii. Adjustable Sleeve Scriber:

This type of scriber has a sleeve that has a narling on its body and a center-round hole in its entire length that can be fitted with a simple scriber and can be adjusted and clamped anywhere. .

iv. Offset Scriber:

An offset scriber is used with a Vernier height gauge, which can be used for precision marking.

Precautions:

I. The edge of the screwdriver should be sharpened so that proper marking can be done.

II. Its point should not be hit on the hard surface.

III. If it is not being used, then it should be placed on its joint with cork etc.

2. Divider:

Dividers are a type of marking tool. It has two legs, the ends of which are sharp and sharp. They are usually made of high carbon steel and their points are hardened and tempered. They can also be made from mild steel and the point can be case hardened. According to work, they are found in many sizes such as 100,150,200 mm. And so on .

Size:

The size of the divider is taken from the distance from the center of its rev or pivot pin to the point such as the divider spring type 150 mm. M .

type:

Often the following types are found:

I. Spring Point Dividers:

In this type of divider, both of its legs are joined by a flat spring and both legs can be adjusted with the help of a nut and screw. Due to the tension of the spring, it can be easily measured accurately. This type of divider is mostly used in workshops.

II. Firm Joint Dividers:

In this type of divider, both its legs are connected with the help of a revant and washer. It is opened or closed only with the help of hands. There is no arrangement of screws and nuts in it. This type of divider is used less often than the spring joint divider.

Use:

In workshops, dividers are often used for the following functions:

i. To draw an arc or circle on the surface of a job.

ii. To divide the line drawn on the surface of a job in equal parts.

iii. To transfer the measurement from the steel rule to the job.

Precautions:

i. The joints of the dividers should be sharp edged.

ii. If the points of the divider are worn out, they should not be grinded separately, but the two should be grind together so that the points will not be big or small.

iii. The firm joint divider revot should not be too tight and not too loose.

iv. If it is not being used, it should be kept with oil or grease.

3. Trammel:

It is used for marking circles and arcs of large size. According to this work, 15 to 50 cm Are found till

Texture:

Its structure consists of a steel rod called a beam. There are two sliding heads above the beam which can be moved around it. These sliding heads are fitted with clamping nuts. Scribers are fitted with sliding heads.

In some tremals, the carrier is also connected with a sliding head, through which fine adjustment can be made as the adjustment screw also fits with it. The sliding head can be tightened to the measurement anywhere on the beam with the help of a clamping nut and can make fine adjustments with the help of a carrier. The measurement on this is also taken from the steel rule.

Precautions:

I. The points of trammel scriber should be sharp edged.

II. From time to time, trammel should be applied with grease or grease to prevent it from rusting.

4. Punch:

When a test is made, marking media is first applied to the job to create it and marking is done as per the drawing, the marking can be erased by repeatedly touching the job while working. Hence the marking done needs to be made permanent.

For this a tool is used called Panch. Dots are applied to the lines marked by the punch so that the marking done can be seen till the last time of creating the job.

Its body is octagonal shape or it is made cylindrical and made narling.

Its structure consists of the following parts:

(i) head

(ii) Body

(iii) Point.

Material:

Punches are usually made of high carbon steel and their points are hardened and tempered.

Size:

The size of the punch is taken from its full length and its diameter. Eg punch 150 × 12.5 mm .

type:

i. Dot punch:

The points of this type of punch are made by grinding them at an angle of 600. It is used to mark the lines after marking and to make them permanent.

ii. Center Punch:

Its point is made by grinding it at an angle of 90C. It is mainly used for punching the center point of a drill hole, because the cutting angle is large, so the dot that will be applied will look a little bigger in size so that the drill web will sit in it easily. Thus the drill hole will be in the center and will not be out.

iii. Prick Punch:

Its point is made by grinding it at an angle of 3030. It is often used to stabilize the marking lines on a soft metal job. Such as copper, brass, aluminum jobs etc.

iv. Automatic Punch:

This type of punch is a modern type of punch which does not require injury from marking hammer while using it. It has a spring and a narling cap. If a deep punch is to be applied, the cap is rotated downwards. While punching, it is pressurized by hand, which marks the punch with the help of a spring. Its point can be in the angle of 90 or 60 according to the work.

Precautions:

I. Point of punch should be sharp edged.

II. The distance between the data hooks is neither too much nor too short. This distance is 3 to 6 mm. Can be kept till

III. While using the center punch, it should be kept in mind that the punch should be placed in the center and depth so that the drill hole can be done in the center.

IV. If the point of a punch is spoiled, it should not be used, rather it should be used again by grinding.

V. If the head of a punch is spoiled, it should not be used.

5. Surface Gauge:

Surface gauge is a type of marking tool with a double-headed scriber attached to it. One end of this scriber is straight and the other end folded in the 90s. Surface gauges are also called marking blocks and scribing blocks.

type:

Usually the following types of surface gauges are used:

I. Fixed Surface Gauge:

This type of surface gauge has a circular or flat shaped base with which a spindle is permanently attached or attached to it with the help of a bangle. With the help of a sliding snug to open the size on it, the scriber is opened upside-down by size. This makes it difficult to open measurements in purity. Therefore, it is used less in the workshop.

II. Universal Surface Gauge:

In this type of surface gauge, the spindle is not directly attached to the surface gauge base, but rather to a rocker arm that is connected to the base. This type of surface gauge is easily adjusted

Can be done and due to the provision of fine adjusting screw, it can also set small measurements up to 1 or 1/2 mm. This surface gauge can be marked with greater accuracy than a fixed surface gauge. Therefore, such surface gauges are mostly used in workshops.

It usually has the following main parts:

(i) Base:

This is the lowest part of the surface gauge above which the rocker arm and guide pins fit. It is often made of cast iron.

(ii) Spindle:

It is usually made of mild steel and the case is hardened. It is attached to the rocker arm.

(iii) Scriver:

It is usually made of high carbon steel and its points are hardened and tempered. It is used to draw lines.

(iv) Scribe Snug:

It can slide up and down on the pillar. It is used to set the scriber to a certain height.

(v) Rocker arm:

It is often attached to the grooves on the base with the help of a screw and spring.

(vi) Fine adjusting screw:

It is often attached to the rocker arm which is used for fine adjusting.

(vii) Spindle Lock Nut:

It is often attached to the rocker arm which is used to clamp the spindle. With this help, the pillar can be tightened in any angle.

(viii) Guide Pins:

These are steel pins that are attached to the base. These can be adjusted up and down. Guide pins are used when parallel lines are drawn from the edge of the surface plate or from the edge of the machine bed.

Use:

I. Surface gauges are used to draw parallel and straight lines.

II. It is also used to check parallel sides.

III. It is also used while tying the job to the center in the four jaw check on the lathe machine.

Marking Method:

i. The surface plate should be cleaned thoroughly.

ii. Surface gauge, angle plate or 'V' block and steel rule should be selected according to the size of the job. If possible, the rule should be used in the combination set.

iii. The steel rule should be supported by supporting the angle plate.

iv. The surface gauge screwer snug should be loosened and opened accordi