Staedtler Mars 561 Reduction Scale Ruler 

The precision instrument for architects, engineers, and technical designers. The Staedtler Mars 561 (Version 1) is a high-quality triangular reduction scale designed for absolute accuracy in technical drawing. Made from solid, dimensionally stable white plastic, it features six precisely divided scales to facilitate effortless measurement on architectural plans and blueprints. Whether you are drafting site layouts in Lidcombe or reviewing construction details in Truganina, this scale ruler provides the professional reliability required for high-stakes projects.

TL;DR - Key Takeaways

• Version 1 Scales: Features six essential reduction ratios: 1:20, 1:25, 1:50, 1:75, 1:100, and 1:125.
• Colour-Coded Identification: Two coloured flutings and grooves allow for rapid selection of the required scale.
• Precision Graduations: Numerated both ways with dimension markings in both centimetres and metres for maximum versatility.
• High-Quality Material: Constructed from solid white plastic that is impact-resistant and maintains its shape over time.
• Standard 300mm Length: Provides a full 30cm working edge, ideal for standard-sized technical drawings.

Key Benefits & Technical Performance

1. Professional Ratio Selection

Why is Version 1 the standard choice? The Version 1 configuration is specifically tailored to the most common ratios used in Australian architectural and engineering standards. With scales ranging from 1:20 for detailed sections to 1:125 for broader floor plans, it allows professionals in Sydney or Melbourne to switch between levels of detail without switching tools.

2. Efficient Visual Workflow

How do the colour codes help? In a busy drafting environment, speed is essential. The Mars 561 utilizes colour-coded grooves (typically red, yellow, and green) so you can identify your most-used scales at a glance. You no longer need to peer closely at the numbers to ensure you’ve rotated to the correct side.

3. Absolute Dimensional Stability

Will the ruler warp or bend? Unlike budget wooden or thin plastic rulers, the Mars 561 is made from a dense, high-grade plastic. It is designed to be dimensionally stable, meaning it won't shrink or expand with temperature changes, ensuring your 1:100 measurement remains perfectly accurate year after year.

4. Bidirectional Numeration

Is it easy to read from both ends? Yes. The graduations are printed to be read from left-to-right and right-to-left. This "numerated both ways" feature is a signature of the Mars professional line, allowing you to measure and mark points from any starting position on your paper without awkward repositioning.

Why Buy From Ozybiz?

Ozybiz is a leading national supplier of premium drafting equipment, business stationery, and industrial supplies. We target online sales Australia-wide and provide rapid service from our local fulfillment centers.

• Australia-Wide Online Sales: We specialize in fast nationwide delivery to every state and territory.
• Trusted Local Dispatch: We operate out of two major Australian hubs—Lidcombe (NSW) and Truganina (VIC)—to ensure your technical tools arrive in perfect condition.
• The Ozybiz Advantage: Consolidate your Staedtler Drafting Tools, Mars Erasers, and Technical Pens into one order to save on shipping costs.

Frequently Asked Questions (FAQ)

Q: Where is my order shipped from? 

A: We dispatch daily from our Lidcombe (NSW) or Truganina (VIC) locations to ensure the fastest delivery across Australia.

Q: What is the difference between Version 1 and Version 4? 

A: Version 1 (this model) covers standard architectural scales (up to 1:125). Version 4 is designed for larger civil engineering or town planning tasks with scales from 1:100 up to 1:500.

Q: Does it come with a case? 

A: The Mars 561 is typically supplied in an impact-resistant plastic blister card or sleeve to protect the precision edges during transit.