GlossaryKind of term: Manufacturing termTitle block
What is a title block?
The title block is the fixed data field on a technical drawing, holding drawing number, revision, title and owner, and often the material.
You usually find it in the bottom right-hand corner of the sheet. It identifies the document by its owner, drawing or part number, title, revision and date, author and approver, and usually gives scale, projection method and sheet number as well. Many companies also put the material, the general tolerance and a general roughness in it or right beside it. The title block carries identity and general requirements; dimensions and specific requirements sit in the views, sections and notes.
What does the standard say about the title block?
ISO 7200 describes which data fields a title block holds, which are mandatory and what they are called; ISO 5457 sets the sheet sizes and where the title block sits. Many companies use a title block of their own that departs from these in part, and older drawings sometimes follow national rules. Which fields appear beyond identification differs per company. A general requirement in or beside the title block applies to everything on the drawing without its own indication, within the conditions of the standard it refers to.
How does the title block work in practice?
On a new request the title block is the first check: which part, which revision, which material, which general tolerance. The revision decides whether a repeat order concerns the same part as last time. The material drives the material price, the cutting data and sometimes the choice of machine or tool; a label such as just aluminium or stainless steel is too vague to estimate from. If a field is missing, or the title block and the notes disagree, ask before you quote.
What is the title block often confused with?
The title block is not the parts list: a parts list on an assembly drawing names the components and quantities, the title block identifies the drawing. Nor is it the material specification: it is where the specification often sits, ideally with its standard and condition.
How do you see the title block in Blake?
Blake takes the material and general tolerance from the title block as proposals on the part, which you then confirm or correct. All revisions stay with the part, and a repeat part is compared with its last priced calculation. More on requests.
Frequently asked questions
What if the material is not in the title block?
Check the notes, the parts list and the order. If it is nowhere, or only given as a general label such as aluminium, ask for the grade, the standard and the condition.
Does the general tolerance apply to every dimension?
To every dimension and feature without an indication of its own, within the scope of the standard named. A tolerance of its own, a tolerance class such as H7 or a feature control frame takes precedence. Boxed theoretically exact dimensions are not covered.