What is a feature of size dimension?

“Feature of size” is the geometric shape defined by size dimensions such as length and angle. Examples of feature of size include cylindrical and spherical forms as well as two opposing planes. Since the feature is defined by size dimensions, the overall size changes along with the dimensions.

What is a feature without size?

What is non feature of size Dimension? In an engineering drawing, the dimensions other than the feature of size are called non feature of size dimensions. In the above figure, we have two non feature of size dimensions (the fillet and the chamfer).

What is difference between feature and feature of size?

A feature is defined as being a physical portion of a part such as a surface, hole, boss or slot. A feature of size is defined in the 2009 Y14.

What is an external feature of size?

External features of size are comprised of part surfaces (or elements) that are external surfaces, like a shaft diameter or the overall width or height of a planar part.

What is features in GD & T?

In GD the term feature-of-size (FOS) refers to any surface, or set of parallel surfaces associated with a size dimension. Specific examples of features of size include: A hole diameter (a cylindrical surface) Plate thickness (two opposed parallel surfaces)

What is feature in GD and T?

In GD (Geometric dimensioning and tolerancing), a feature control frame is required to describe the conditions and tolerances of a geometric control on a part’s feature. The feature control frame includes four parts: GD symbol/control symbol. Tolerance zone type and dimensions.

Is a cone a feature of size?

(A feature of size must have opposing elements, so an insubstantial cylinder, cone, or sphere cannot be considered a feature of size.

What is a Type B irregular feature of size?

A type B irregular feature of size is a shape that does not nicely fit into a sphere or between two parallel planes.

What is size tolerance?

Size Tolerance – A size tolerance states how far individual features may vary from the desired size. Size tolerances are specified with ether unilateral, bilateral or limit tolerance methods.

What is MMC GD and T?

Maximum Material Condition (MMC)

What are the features of a cone?

Properties of Cone

• A cone has only one face, which is the circular base but no edges.
• A cone has only one apex or vertex point.
• The volume of the cone is ⅓ πr2h.
• The total surface area of the cone is πr(l + r)
• The slant height of the cone is √(r2+h2)

Is a hole a feature?

Also on engineering parts, each thing we can point to on it is a feature as shown below. But note that features are always things that we can touch. So the hole (at its surface) is a feature.

What is LMC size?

Least material condition is a feature of size symbol that describes a dimensional or size condition where the least amount of material (volume/size) exists within its dimensional tolerance.

What is basic size in tolerance?

The term basic size refers to the size from which the limits of size are derived by the application of tolerance (i.e. upper and lower deviation). The basic size or nominal size of a part is often the same and it is termed as zero line. 6.

What are the types of fit?

There are three types of fit commonly referenced in manufacturing and mechanical engineering.

• Clearance Fit. Clearance fits allow for loose mating, where free movement is important and a certain amount of play is desired.
• Interference Fit. An interference fit will be much tighter than a clearance fit.
• Transition Fit.

What are the features of size dimensions?

The feature of size dimensions are the dimensions attached to the cylindrical or spherical surfaces or a set of parallel surfaces. GD Tutorial on Projected Tolerance: This geometric dimensioning and Tolerancing or GD tutorial will discuss about projected tolerance, its application and benefits for preparing engineering drawing.

What are non feature of size dimensions in engineering drawing?

In an engineering drawing, the dimensions other than the feature of size are called non feature of size dimensions. In the above figure, we have two non feature of size dimensions (the fillet and the chamfer). The terms feature and feature of size are referred very frequently for explaining various GD concepts.

Why are features of size unique to each model?

Features of size are unique because they: 1 Contain opposed points 2 Have a reproducible derived median point, axis or center plane 3 Have limits (are not basic)

What is a feature-of-size?

In GD the term feature-of-size (FOS) refers to any surface, or set of parallel surfaces associated with a size dimension. Specific examples of features of size include: The example below shows three views of a plate with two holes. There are two dimensions called out in this drawing: a plate thickness and a hole diameter.