What is the Maximum Material Condition (MMC)?
Is when both mating parts have the most mass, aka smallest hole largest shaft
MMC refers to the condition of a part when it contains the maximum amount of material.
Name the three styles of small hole gauges.
- A) twin ball
- B) Hardened ball
- C) Half ball
These styles refer to different types of components used in measurement.
Define Tolerance in the context of measurement.
The total amount of variation permitted
Tolerance is crucial for ensuring parts fit together correctly.
What do Dial Indicators measure?
The difference in height or position in duplicate parts
They indicate the largest/smallest permitted size.
What is the difference between Unilateral Tolerance and Bilateral Tolerance?
- Unilateral Tolerance: Variation in one direction
- Bilateral Tolerance: Variation in size in both directions
These tolerances define how much a part can deviate from its nominal size.
What are Firm Joint Calipers used for?
They have no adjustment nut and include inside & outside versions
These calipers are used for precise measurements.
What is Nominal Size?
An imperial standard size used for general identification
It serves as a reference point for measurements.
Define Actual Size.
The measured size of a component
Actual size is critical for quality control.
What is Basic Size?
The theoretical size to which the tolerances are applicable
Basic size is used as a reference for tolerance calculations.
What is a Telescoping Gauge used for?
To measure bores, slots, and recesses.
It helps determine the largest and smallest limits a part can be. They don’t have their own measurement scale.
What is the function of Hermaphrodite Calipers?
Has two different legs, one pointed & adjustable, the other curved. Primarily for scribing parallel to an edge.
They are used for marking and measuring. Can also find the center of the end of a shaft.
What is a Surface Gauge used for?
A layout tool used to scribe horizontal lines parallel to its base
It can also find the center of a shaft.
What is the Height Gauge known for?
Most common layout tool, made to an accuracy of a thousandth of an inch (0.001 inch) or 0.02mm.
It is essential for precision layout work.
What are the components of a Combination Set?
- Square head
- Center head
- Bevel protractor
- Steel rule
This set is versatile for various measuring tasks.
What is the angle of the point ground for a Prick Punch?
30 - 60° angle
This angle is designed for effective punching.
What angle is associated with a Center Punch?
90° angle
It is used to create a starting point for drilling.
