Here are the key features of a drafting lettering guide:
1. Templates and Scales: Drafting lettering guides come in different sheet sizes and scales to accommodate various drawing requirements. Common sizes include A4 (210 x 297mm), A3 (297 x 420mm), and A2 (420 x 594mm), among others. The scale refers to the ratio between the size of the letters on the guide and the actual size they represent on the drawing. For example, a 1:10 scale means that one unit on the guide represents ten units on the drawing.
2. Channel Openings: The guide consists of a series of precise channel openings cut out in the plastic sheet. These channels are shaped like individual uppercase and lowercase letters, numbers, and symbols, such as punctuation marks, mathematical symbols, and engineering notations.
3. Tracing Method: To use the drafting lettering guide, a draftsman positions the guide over the drawing area and places a drafting pen or pencil within the channel openings. By holding the pen or pencil at an appropriate angle, the user can trace along the channels to create the desired lettering. The channel edges serve as guides, ensuring uniform line thickness and precise letter spacing.
4. Lettering Styles and Fonts: Different lettering guides offer various lettering styles and fonts, such as architectural, engineering, Roman, Gothic, and mechanical lettering. Each style has its distinct characteristics and applications in different technical fields.
5. Reusable and Portable: Drafting lettering guides are typically made of durable plastic, making them reusable and long-lasting. Their lightweight and portable design allows drafters to carry them easily and use them in different drafting or design projects.
Overall, a drafting lettering guide is an indispensable tool for technical drawings, enabling drafters to create consistent, accurate, and professional-looking lettering in various lettering styles and sizes.