Shop drafting scales for architecture, engineering, mechanical drafting, technical drawing, design layouts, and professional measurement applications. Drafting scales, triangular rulers, and triangular scale rulers are precision measuring tools used to create and read scaled drawings, construction plans, engineering layouts, and technical illustrations.
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30cm Metric Select-A-Scale
Alumicolor$15.70Alumicolor Metric Select-a-Scale are an ultra convenient and functional drafting tool that allows engineers to select multiple scales all in one product. The unique design incorporates a sculptured arch on the bottom for ease of movement. A rotating rod... -
30cm Professional Metric Scale 01
Pacific Arc$5.90The Professional Premium Plastic Triangular Metric Scales, made in Japan, offer precise etched graduations and enduring strength. With their slender core design and high-quality plastic construction, these scales ensure accuracy and durability for... -
30cm Scholastic Metric Architect Scale
Alvin Drafting$5.50Our top-selling series of 30cm triangular metric scales comes highly recommended for scholastic and vocational use, combining budget-friendly pricing with exceptional quality. Crafted from durable high-impact plastic, featuring a smooth satin finish and... -
30cm Scholastic Metric Scale
Alvin Drafting$5.50These 12" triangular metric architect scales are ideal for school and vocational use, blending affordability with durability. Crafted from high-impact plastic with tapered edges and sharp, easy-to-read graduations, they ensure comfort and precision... -
30cm Solid Aluminum Metric Triangular Scale
Fairgate$12.70Rugged, professional-quality scales are made from anodized aluminum with a solid core. Features: Scales: 1:20, 1:25, 1:50, 1:75, 1:100, 1:125. Printed black graduations on non-glare finish Color-coded furrows. Shrink-wrapped. -
4" Architect Color-Coded Scale
Alumicolor$7.65The 4" color-coded architect solid triangular scale, crafted from premium extruded aluminum, features exceptionally smooth edges. Each side is distinguished by a unique color-coded groove, facilitating easy identification of your calibrations... -
4" Engineer Color-Coded Scale
Alumicolor$7.65The 4" color-coded solid triangular engineer scale, crafted from premium extruded aluminum, features exceptionally smooth edges. Each side is distinguished by a unique color-coded groove, facilitating easy identification of your calibrations... -
4" Engineer Plastic Mini Scale
Pacific Arc$9.40The Professional Premium Plastic Triangular Engineer Scales boast precision and convenience with their color-coded design and premium plastic core. Etched graduations on the white plastic surface ensure accurate measurements for architectural and... -
4" Mini Aluminum Engineer Triangular Scale
Alvin Drafting$12.30This 4" professional pocket engineer scale, crafted from solid aluminum, ensures both lightweight portability and durability for on-the-go use. Its tapered edges and color-coded furrows enhance ease of use, while the included vinyl sheath provides... -
6" Aluminum Engineer Scale
Alumicolor$7.20Alumicolor Architect and Engineer Four Bevel Scales are precision measuring and drawing devices. Alumicolor's photo anodizing process make the calibrations a part of the aluminum providing a smooth, tick-free finish and markings that will resist wear and... -
6" Architect Color-Coded Scale
Alumicolor$8.30Crafted from high-quality extruded aluminum, the 6-inch color-coded architect solid triangular scale boasts ultra-smooth edges for precision. Each side is marked with a distinctive color-coded groove, making it effortless to identify and calibrate... -
6" Architect Select-A-Scale
Alumicolor$11.85Alumicolor Architect Select-a-Scale are an ultra convenient and functional drafting tool that allows architects to select multiple scales all in one product. The unique design incorporates a sculptured arch on the bottom for ease of movement. A rotating... -
6" Architect Triangular Scale
Pacific Arc$9.10Professional Premium Plastic Triangular Scales - Color Coded Premium plastic ore triangular scales provide precise graduation etched on premium white color-coded plastic for exact performance.Architect GraduationsOpen divided: 3/32, 3/16, 1/8, 1/4, 3/8,... -
6" Architectural/Engineering Scales Set
Alvin Drafting$10.70Our high-quality scales, crafted from durable high-impact plastic, feature non-reflective matte faces, tapered edges, and printed graduations with color-coded furrows. This set of two includes scales for architects and engineers, ensuring precision and... -
6" Color-Coded Architect Scale
Pacific Arc$6.20The Pacific Arc Collegiate Plastic Architect Triangular Scales offer color-coded quality for accurate performance on a budget. Made with high-quality heavy plastic, these scales are ideal for drafting, architects, or students on the go. The... -
6" Color-Coded Engineer Scale
Pacific Arc$6.20The Pacific Arc Collegiate Plastic Architect Triangular Scales offer color-coded quality for accurate performance on a budget. Made with high-quality heavy plastic, these scales are ideal for drafting, architects, or students on the go. The... -
6" Color-Coded Engineering Scale
Alvin Drafting$7.70High-quality scales made from high-impact plastic with white, nonreflecting, matte faces and tapered edges. Printed graduations and colorcoded furrows.Engineer Graduations 10, 20, 30, 40, 50, 60 parts to the inch. Features: 6" Engineer Pocket Drafting... -
6" Drafting Fan
Alumicolor$14.40The Alumicolor® Drafting Fan is another convenient all-in-one tool made from aluminum that has all standard Architect, Engineer and Metric scales used in the industry. 8 blades of aluminum sheet, riveted together giving you a compact tool... -
6" Engineer Color-Coded Scale
Alumicolor$8.30Crafted from high-quality extruded aluminum, the 6-inch color-coded engineer solid triangular scale boasts ultra-smooth edges for precision. Each side is marked with a distinctive color-coded groove, making it effortless to identify and calibrate... -
6" Engineer Select-A-Scale
Alumicolor$11.85Alumicolor Engineer Select-a-Scale are an ultra convenient and functional drafting tool that allows engineers to select multiple scales all in one product. The unique design incorporates a sculptured arch on the bottom for ease of movement. A rotating...
Types of Drafting Scales
Drafting scales are specialized measuring tools designed for reading, creating, and transferring scaled measurements in technical drawings and design layouts. This category includes architect scales, engineering scales, combination scales, mechanical drafting scales, metric scales, triangular rulers, ruler triangular designs, and triangular scale rulers used by architects, engineers, designers, students, and drafting professionals.
- Architect Scales: Support architectural floor plans, elevations, blueprints, and building design layouts using fractional scale systems
- Engineering Scales: Use decimal graduations for civil engineering, surveying, infrastructure layouts, and technical drawing applications
- Combination Scales: Combine multiple drafting scale systems into a single measuring tool for flexible drafting workflows
- Mechanical Drafting Scales: Provide specialty graduations and precision measurement systems used in mechanical and technical drawing applications
- Metric Scales: Support metric drafting, engineering layouts, international standards, and STEM education applications
- Triangular Rulers: Offer multiple scale graduations on a compact three-sided ruler design for efficient drafting and measurement work
- Triangular Scale Rulers: Help users quickly switch between multiple drafting scales while maintaining accurate layout measurements
Understanding Drafting Scales
Drafting scales are essential tools used to convert real-world dimensions into scaled technical drawings and layouts. Architects, engineers, designers, and drafters use scale rulers to accurately read and create drawings that represent buildings, infrastructure, machinery, products, and technical systems at reduced or enlarged sizes.
Triangular rulers remain one of the most popular drafting scale formats because they allow multiple scale graduations to be combined into a compact and efficient measuring tool. A triangular scale ruler helps streamline drafting workflows by allowing users to switch quickly between different scale systems without changing tools.
Drafting Scales in Architecture & Engineering
Different drafting disciplines rely on different scale systems. Architect scales commonly use fractional measurements found in building plans and construction drawings, while engineering scales use decimal graduations often preferred for civil engineering and technical layouts.
Mechanical drafting scales and metric scales support additional technical applications requiring specialized graduations and international measurement standards. Using the proper drafting scale improves layout accuracy, readability, and consistency throughout technical drawing workflows.
Choosing the Right Triangular Scale Ruler
When selecting drafting scales, consider the drafting discipline, graduation system, material, edge style, and intended application. Triangular rulers are popular because they provide multiple scale systems in a single compact tool, while flat drafting scales may offer larger graduations and easier readability for specific workflows.
Professional drafting scales are designed with accurate graduations, durable materials, and clear markings that remain readable during repeated technical use. Choosing the correct scale ruler helps improve measurement accuracy and workflow efficiency in drafting, architecture, engineering, and design environments.
Complete Your Drafting Workspace
Pair drafting scales with drafting pencils, technical pens, triangles, templates, and drafting paper for accurate technical drawings and professional layout applications.
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