Manufacturers Guide to Understanding Assembly Drawings

An assembly drawing is a formal way of representing a machine or a component to be manufactured. It is done to represent the form, fit and function of a product, and to verify how that product is put together. Often manufacturers outsource mechanical assembly drawings to understand and develop an assembly for the manufacturing process.

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Different type of mechanical assembly drawings include outline drawing, erection drawings, assembly work drawings, assembly diagram, part assembly drawings and general assembly drawings.

  • Outline assembly drawings also known as the setting drawings are done to depict the outline of the machine/component. Overall dimensions and center distances are mentioned in these drawings. These drawings provide only a general appearance or say a fair idea of how a machine will look, and are widely used for proposing a design to clients and in product catalogs.
  • In erection drafts, each part in a machine is named and labeled, so that it can be easily identified. These specification sheets depict the exact location of each part, and hence are a vital aid in erecting a machine by joining several individual parts.
  • Assembly working drawings carry fully dimensioned detailed specifications of a machine. A mechanic can easily build a machine by reading these drawings- as all the assembly details are packed into a single draft sheet. However such drawings are used when only a small lot of (numbered) machines are to be manufactured and not for mass production of machines/components.
  • An assembly diagram contains either a sectional view or an external view of the entire machine. These diagrams are well labeled and each machine part is either named or numbered for easy identification. The drawing also contains a list of parts mentioned therein.
  • Part assembly drawings are done to aid improved manufacturing of machine parts and components. A particular part of the machine is illustrated in detail and its relation and interaction with the entire machine is also depicted.
  • General assembly drawings contain illustrated drawings of the entire machine design. These drawings are developed from the rough sketches and specifications provided by the engineer. The drafts give an overview of the assembled machine and the general relation of its components.

Hi-Tech Outsourcing Services offers all the above mentioned types of assembly drawings for manufacturers. The company has all the required CAD tools for preparing assembly drawings for machine designs with utmost precision and detail. Experts at the company are experienced enough to handle any scale and complexity of projects with great ease, and have worked for clients across the globe from countries of US, UK, Australia and UAE.

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