Skip to main content

Least Count

Least  Count

 

Instrument

Metric(m.m.)

British (Inch)

Vernier Caliper

0.02 m.m.

0.001"

Vernier Height Gauge

0.02 m.m.

0.001"

Vernier Tooth Gauge

0.02 m.m.

0.001"

Gear Tooth Gauge

0.02 m.m.

0.001"

Inside Micrometer

0.01 m.m.

0.001"

Outside Micrometer

0.01 m.m.

0.001"

Depth Micrometer

0.01 m.m.

0.001"

Dial Micrometer

0.001 m.m.

0.001"

Sheet Micrometer

0.01 m.m.

0.001"

Tube Micrometer

0.01 m.m.

0.001"

Combi Micrometer

0.01 m.m.

0.0001"

Vernier Micrometer

0.001 m.m.

0.0001"

Digitial Micrometer

0.001 m.m.

0.0001"

Dial Test Indicator

0.01 m.m.

0.001"

Digital Height Gauge

0.01 m.m.

0.001"

Gauge Block

0.01 m.m.

0.0001"

Slip Gauge

0.01 m.m.

-

Sine Bar

1' (min)

-

Vernier Bevel Protector

5' (min)

-

Angle Gauge Block

1”(sec)

-

Three Point Internal Micrometer

0.005 m.m.

-

Comments

Post a Comment

Popular posts from this blog

What is countersinking?

What is countersinking? Countersinking is an operation of beveling the end of a drill hole. The tool is called countersink. Countersinks have edges on a conical surface. Purpose of countersinking? to provide a recess for the head of countersinking screw. to   deburr a hole after drilling. for accommodating countersink rivet heads. to chamfer the ends of hole after thread cutting. Angle of countersinking             75 0 -  countersink riveting             80 0 - countersink self tapping screws             90 0 - countersink head screws and deburring.             120 0 - chamfering ends of holes to be threaded and other machining process. Type of countersink: Different types of countersinks are available 1. Taper shank and st...
Post a Comment
Read more

angle of pric punch

Types and Angle of Punch Punches are two types centre punch & prick punch. The angle of prick punch is 30 ° or 60°. The 30° prick punch is used for marking sharp impression on metal.  The 60° punch is used for marking witness mark. So 60° prick punch is called as Dot punch. Centre Punch marks of angle  90°. Prick Punch  : 30°(Sharp impression)  Dot Punch     : 60°( witness mark)  Centre Punch: 90°(marking 90° angle ) The witness mark should not be too close to one another.  The distance of   one dot mark to another dot is 6 mm.
Post a Comment
Read more