inside vs outside folding ruler

Inside vs Outside Folding Ruler: A Comparative Guide

By Sarah Martin
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When it comes to measuring with precision, the type of folding ruler you use can make a significant difference in your workflow. Two of the most common types are inside folding rulers and outside folding rulers. Both have their unique advantages and are suited to different tasks. Let's dive into the details of each to help you decide which one is right for you.

Folding rulers come in various sizes and materials, but they primarily differ in how their blades (or arms) move and fold. Understanding this difference can help you choose the right tool for your project.

Inside Folding Rulers

Inside folding rulers, also known as 'compass rulers,' are characterized by their blades that fold inward towards the center when collapsed. This type is popular among artists, designers, and DIY enthusiasts due to its versatility and portability.

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foldable ruler
foldable ruler
four different angles of wooden rulers on a white surface
four different angles of wooden rulers on a white surface
Why You Should Own A Folding Or Sliding Ruler Ruler, Tools
Why You Should Own A Folding Or Sliding Ruler Ruler, Tools

They typically come with fixed graduated marks for measurements and can have a center pivot point for drawing arcs and circles. This feature makes them excellent for creating repetitive patterns and designs that require precise measurements.

Advantages of Inside Folding Rulers

1. Versatility: Inside folding rulers are highly versatile. They can measure, draw lines, arcs, and circles, making them an essential tool for both technical drawing and creative applications.

Boxwood folding ruler with brass tips
Boxwood folding ruler with brass tips
Multifunctional Ruler
Multifunctional Ruler
Repurposed Vintage Folding Ruler Frame
Repurposed Vintage Folding Ruler Frame

2. Portability: Due to their compact size when folded, inside folding rulers are easy to carry around and store, making them ideal for on-the-go projects or limited workspace situations.

Disadvantages of Inside Folding Rulers

1. Limited Length: While they are convenient, inside folding rulers have a limited length even when fully extended, which can be restricting for larger projects that require longer measurements.

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2. Complex Folding Mechanism: The multiple blades on inside folding rulers can sometimes make adjusting and securing them to the desired measurement more complex than with a simple rulers.

A splendid week ahead...
A splendid week ahead...
Multifunctional Student Math Ruler
Multifunctional Student Math Ruler
several rulers and other tools are laid out on a table
several rulers and other tools are laid out on a table
the folding ruler is designed to be used with all kinds of tools
the folding ruler is designed to be used with all kinds of tools
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KLEIN TOOLS, INC 905-6 Ruler folding wood extension outside reading 6'
Free Printable Millimeter Ruler (Actual Size)
Free Printable Millimeter Ruler (Actual Size)

Outside Folding Rulers

In contrast to inside folding rulers, outside folding rulers have blades that fold outward when collapsed. They are often used in technical drawing, engineering, and construction as they can extend to significant lengths.

The most common type is the ' erased quadrilateral' or 'T-square' folding ruler, consisting of three blades that form a right angle when fully extended. This version is highly versatile and can also serve as a T-square, making it useful for drawing straight lines and right angles.

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Many outside folding rulers come with adjustable blades, allowing for more precise measurements. They can also include additional features like levels and edges for more accurate alignment.

two hands holding up a red tape shaped like an arrow
two hands holding up a red tape shaped like an arrow
an art project made out of different types of rulers and pencils on top of paper
an art project made out of different types of rulers and pencils on top of paper
Ridiculously Easy: Ruler becomes a Star
Ridiculously Easy: Ruler becomes a Star
30CM Aluminum Alloy Folding Ruler Student Multi-functional Aluminum Alloy 30CM Folding Ruler 15CM
30CM Aluminum Alloy Folding Ruler Student Multi-functional Aluminum Alloy 30CM Folding Ruler 15CM
several pieces of wood sitting on top of a white table next to other wooden items
several pieces of wood sitting on top of a white table next to other wooden items
The folding ruler gets immortalized with a beautiful all-metal construction - Yanko Design
The folding ruler gets immortalized with a beautiful all-metal construction - Yanko Design
a green ruler with a drawing of a horse on it's face and the words measure
a green ruler with a drawing of a horse on it's face and the words measure
Paper Craft Ruler / DIY Paper Ruler / Paper Folding Ruler /
Paper Craft Ruler / DIY Paper Ruler / Paper Folding Ruler /
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Paper Folding Ruler / How to Make Paper Scale /Back to School /Origami craft with paper /Paper craft
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Lot of 6 Vintage Folding Rules Lufkin Evans Stanley Triumph French Hi-Test
Boxwood folding ruler with brass tips
Boxwood folding ruler with brass tips
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2pcs Folding Straight Rulers 30cm Metric Protractors 2 Colors
a person holding up a ruler in front of a wall with rulers on it and the words midori multi ruler
a person holding up a ruler in front of a wall with rulers on it and the words midori multi ruler

Advantages of Outside Folding Rulers

1. Long Reach: Outside folding rulers can extend to considerable lengths, making them perfect for measuring, drawing, and cutting on larger projects where precision is crucial.

2. Adjustability and Precision: With adjustable blades, outside folding rulers allow for more fine-tuning of measurements, ensuring greater accuracy and reducing errors in your work.

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Disadvantages of Outside Folding Rulers

1. Larger Size When Folded: Outside folding rulers can be bulkier and larger when folded, especially those with adjustable features, which might not be ideal for carrying around or storing in tight spaces.

2. Complexity in Use: The multiple blades and adjustable nature of some outside folding rulers might make them more complex to use, especially for beginners or non-technical users.

In many cases, having both an inside and an outside folding ruler in your toolkit can be beneficial, as they cater to different needs and provide backup for when one type isn't suitable for the task at hand. The key is to understand their unique features and when to use each one.

Ultimately, the choice between an inside and an outside folding ruler depends on the specific requirements of your projects, workspace, and personal preferences. Both have their unique advantages and are valuable tools in various applications. So, consider your needs and explore the different options available to find the perfect fit for your projects.

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