Shop beam compasses for large-radius circle drawing, oversized arcs, engineering layouts, architectural drafting, and precision technical drawing applications. Beam compasses extend the range of standard drawing compasses, making them ideal for creating large circles and arcs that exceed the capacity of traditional drafting compasses.
For standard circle drawing, geometry work, and everyday drafting applications, see our Drawing Compasses.
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Comfort Compass & Beam Set
Staedtler$35.40Precision compass with spindle guide, spring-bow head and centre wheel.Features:Solid metal compassHinged leg joint and needle shoeInterchangeable lead part with shank 4 mmInterchangeable shouldered needleMax. circle approx. 265 mm, with extension bar... -
Professional 6" Pen/Pencil Compass with Beam Bar
Pickett$34.10The Pickett Professional 6 Inch Pen and Pencil Compass is made of durable steel construction for long-lasting use. This 6 inch compass makes a maximum 10" circle and is delicately balanced, providing feather-light control. Made of chrome-plated brass and... -
6" Basic-Bow Compass and Beam Bar
Alvin Drafting$27.20Designed with a fiberglass ringhead and pivot design for smooth, firm adjustment. Features: Accurate center wheel adjusts quickly Makes circles up to 10" in diameterBeam bar extension creates circles up to 20" in diameterBuilt-in spindle... -
6" Professional Speed-Bow Compass Beam Bar Set
Alvin Drafting$21.20This compass is made from zinc alloy with a matte chrome finish. Sturdy push button mechanism allows for quick adjustments, while the red spindle can be used for more finite adjustments. Features: Double break leg designCreate circles up to 12" in... -
6" Quick Action Compass with Extension Bar
Pacific Arc$16.60Professional quality Speed Bow Compass adjusts two ways: press the buttons on the legs for extremely fast adjustment or use the center wheel for fine adjustment.QSB-810CEX features our signature 6" QSB-series compass with beam, universal adaptor and... -
Alumicolor Beam Compass Rule
Alumicolor$14.05 - $15.35The Alumicolor Compass Ruler Set includes a shaft, anchor point, lead holder, and lead, all in one package. This versatile tool can create large circles and automatically calculates the radius, area, and circumference. The fingertip control trammel... -
Graduated Beam Compass
Alvin Drafting$50.30The Alvin Beam Compass Comes with two graduated beam bars and includes spare leads and needlepoint, is also complete with interchangeable ruling pen, pencil, and divider legs. This beam compass is conveniently packaged and comes in a hard, see-through... -
Speed Bow Introductory Compass with Beam Bar
Alvin Drafting$21.90Synchronized precision scissor-action thread system opens or closes legs to desired radius in one quick motion. Perfectly balanced and weighted for easy one-hand operation. Features: Creates circles up to 12" in diameterBeam bar extension for drawing... -
Speed-Set Beam Compass
Alvin Drafting$40.00The Alvin Beam Compass Comes with two 13-inch non-graduated beam bars and includes spare leads and needlepoint, is also complete with interchangeable ruling pen, pencil, and divider legs. This beam compass is conveniently packaged and... -
Speed-Set Beam Compass
Pacific Arc$39.70Made in Germany using the finest materials and proven manufacturing techniques, the beam compass allows the user to draw circles up to 48” in diameter. Each beam compass set includes two beam bars, one coupling, ruling pen, pencil, divider legs, spare...
Types of Beam Compasses
Beam compasses are precision drafting instruments designed to draw large circles, long-radius arcs, and oversized layouts used in architecture, engineering, fabrication, woodworking, industrial design, and technical drawing applications. Unlike standard drawing compasses, beam compasses use extension bars or beams to significantly increase drawing radius capacity while maintaining accurate center alignment and smooth arc control.
- Professional Beam Compasses: Create accurate large-radius circles and arcs for technical drawing, engineering layouts, and architectural drafting
- Beam Compass Sets: Include extension bars, interchangeable heads, adapters, and accessories for expanded drafting flexibility
- Extension Beam Systems: Increase the drawing range of drafting compasses for oversized layouts and large-format circle work
- Large Radius Compasses: Support industrial design, fabrication, woodworking, sign layout, and construction drawing applications
- Center-Wheel Beam Compasses: Provide smooth radius adjustment and improved control for precision arc and circle drawing
- Technical Beam Compass Tools: Support engineering, manufacturing, and mechanical drafting workflows requiring accurate large-scale geometry
- Replacement Beam Compass Parts: Maintain professional drafting systems with replacement bars, adapters, points, and drawing attachments
Why Beam Compasses Still Matter
Beam compasses remain essential because many drafting, fabrication, and layout applications require circles and arcs that are too large for standard drawing compasses. Architects, engineers, fabricators, designers, woodworkers, and students continue to use beam compasses for large-radius geometry, oversized layouts, concept drawings, field work, and manual drafting applications where repeatable accuracy is critical.
Professional beam compasses are engineered for stable radius control, precise alignment, smooth adjustment, and long-term durability. Features such as extension bars, interchangeable heads, center-wheel controls, and adjustable beam systems help improve accuracy while reducing layout errors in large-format technical drawing environments.
Choosing the Right Beam Compass
When selecting a beam compass, consider the maximum radius capacity, adjustment style, beam length, and type of drawing work being performed. Compact beam compass systems work well for general drafting and classroom use, while professional large-radius beam compasses are better suited for engineering layouts, architectural plans, fabrication work, and industrial design applications.
Complete Your Drafting Workspace
Pair beam compasses with related drafting instruments and technical drawing tools to create accurate layouts, large-radius circles, engineering drawings, and professional drafting plans.
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