# How do you read a surface profile tolerance?

## How do you read a surface profile tolerance?

The top figure shows the profile tolerance applied to a curved surface. The boxed symbols can be read “with respect to datum A, this surface must lie between two surface boundaries 0.8 apart and spaced equally about the true (or ideal) surface profile”.

### What is profile of a surface in GD?

Description: Profile of a surface describes a 3-Dimensional tolerance zone around a surface, usually which is an advanced curve or shape. If it is called out on a curved surface, like a fillet on a welded part, the entire surface where the radius is has to fall within the tolerance zone.

What symbol means tolerance?

If the tolerance is preceded by a diameter symbol (⌀), the tolerance is a diameter or cylindrical shaped zone, as in the position of a hole. If there is no symbol preceding the tolerance, the default tolerance zone shape is parallel planes or a total wide zone, as in the position of a slot or profile of a surface.

What is the tolerance zone for profile of a line?

The profile of a line tolerance zone falls within two parallel curves that follow the contour of that profile. Since measurements might need to be taken at multiple cross sections of a part, the number of cross sections to be measured is usually included on the drawing along with the called-out tolerance.

## How is profile of a surface measured?

Surface profile measurement is the measurement of a line across the surface that can be represented mathematically as a height function with lateral displacement, z(x). With a stylus or optical scanning instrument, profile measurement is carried out by traversing the stylus across a line on the surface.

### Can a profile be a datum?

Profile can control, form, location, orientation, and size or any subset of these. Profile can be used with or without datum references and with or without basic dimensions.

How do you manually measure a surface profile?

When pressed against a roughened steel surface, the foam collapses and forms an impression of the surface. Placing the compressed tape between the anvils of a micrometric thickness gage and subtracting the contribution of the incompressible substrate, 2 mils, gives a measure of the surface profile.

Can profile of a surface be used with a size tolerance?

When used with datums, profile can mimic all the orientation symbols (perpendicularity, parallelism, angularity) and even control the location and size of a feature or surface. All of these symbols have a tolerance zone existing of parallel surfaces surrounding the measured profile.

## What does G D mean?

G-d is a unity. He is a single, whole, complete indivisible entity. He cannot be divided into parts or described by attributes. Any attempt to ascribe attributes to G-d is merely man’s imperfect attempt to understand the infinite. G-d is the only being to whom we should offer praise.

### Who owns General Dynamics?

General Dynamics Mission Systems was formed in January 2015 when General Dynamics combined the company’s C4 Systems and Advanced Information Systems. General Dynamics C4 Systems was originally owned by GTE and operated as GTE Government Systems.

What is the General Dynamics help desk number?

The customer service and support representative will support member’s all kinds of problems, questions and inquiries. The all contact helpline numbers of General Dynamics is listed below: General Dynamics Customer Service Number: 1-888-432-3633.

What are general dynamic locations?

General Dynamics renamed the division ” General Dynamics Land Systems “. It operates the Lima Army Tank Plant and GDAO (General Dynamics Anniston Operations) in Anniston, Alabama, along with smaller operations in Tallahassee, FL, and Scranton, PA.