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Slide Rulers

Slide rules have been around since the early 1900s, but they still remain as useful tools today. They come in various sizes and shapes, and are often used by engineers and scientists. This article explains what slide rule users need to know before purchasing their first one.

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Buyer's Guide

How to choose the
best slide rulers

How Do Slides Rules Work?

The most common type of slide rule has a fixed scale marked along its length. To use these types of slides, you must align the ruler with the distance you wish to measure. Then, using the index finger of your dominant hand, press the pointer end of the ruler into the material being measured. As you push the ruler forward, the pointer moves across the scale indicating the measurement. Once you reach the desired point, stop pushing the ruler and remove it from the material.

Are They Useful Tools?

Yes, slide rules are extremely useful tools. They are easy to use and require no special training to operate. Most importantly, slide rules are inexpensive making them affordable for anyone who needs to measure small distances.

Do They Have Any Drawbacks?

There are drawbacks to slide rules. First, they are bulky and take up valuable storage space. Second, they are difficult to read since the scales are printed directly on the ruler. Third, they are hard to transport due to their size. Finally, slide rules are not always accurate.

Should I Use One?

Slide rules are useful tools that are worth considering purchasing. While they aren't perfect, they are still helpful and convenient.

The Importance of Purchasing a Quality Slide Rulers

Slide rules are essential tools for anyone who needs to measure precise distances. Whether you’re building a house, putting together furniture, or making repairs around the house, slide rules are indispensable. However, there are many cheap slide rule options available online today. Many of these products are poorly constructed and cheaply manufactured. As a result, they break very easily. Some of these inexpensive slide rules are difficult to read and hard to understand. Others are too small to be useful. Still others are missing features that are necessary for measuring precision.

How To Select A Good Slide Rule

Before selecting a good slide ruler, you must determine which type of measurement you require. There are two types of measurements that most people need: linear and angular. Linear measurements involve straight lines while angular measurements involve angles. For example, you could measure the length of a wall using a linear slide rule. Alternatively, you could measure the angle between two walls using an angular slide rule.

Linear Measurements

For linear measurements, you need a slide rule that has a scale marked in both inches and fractions of an inch. Most slide rules include scales for feet, yards, miles, centimeters, millimeters, meters, decimals, and graduations. You can also select a slide rule that includes a decimal point. Decimal points allow you to perform calculations involving large numbers.

Angular Measurements

To measure angles, you need a slide rule that has a scale marked in degrees. Most slide rules include scales for degrees, minutes, seconds, radians, and arcseconds. You can also select a slide rule that includes a degree symbol. Degree symbols allow you to perform calculations involving large angles.

Other Features

In addition to the above mentioned features, you should also check whether the slide rule comes with a protractor. Protractors enable you to draw accurate circles and arcs. Other features that you should consider include a zero line indicator, a speed dial function, and a built-in calculator.

Buying Guide

There are several factors that you should take into consideration when shopping for a slide rule. First, you should ensure that the product meets industry standards. Second, you should examine the construction materials. Third, you should evaluate the accuracy of the slide rule. Finally, you should test the functionality of the slide rule.


Features To Look For When Buying A Slide Rulers

Slide rulers are essential tools for anyone who needs precise measurements. Whether you’re measuring a piece of furniture, cutting fabric, or building a house, these handy devices allow you to measure precisely and repeatably. But there are many different types of slide rules available today, each with its own unique features. So which ruler should you buy? Here are five key features to look for when shopping for a slide rule.

The size of your slide rule determines how large of a measurement range it has. Most slide rules start around 1 inch (2.5 cm) wide and end somewhere between 10 inches (25cm) and 20 inches (50cm). However, larger models exist, including those that go up to 30 inches (75cm), 40 inches (100cm), 50 inches (125cm), 60 inches (150cm), 70 inches (175cm), 80 inches (200cm), 90 inches (225cm), 100 inches (250cm), 110 inches (275cm), 120 inches (300cm), 130 inches (325cm), 140 inches (350cm), 150 inches (375cm), 160 inches (400cm), 170 inches (425cm), 180 inches (450cm), 190 inches (475cm), 200 inches (500cm), 210 inches (525cm), 220 inches (550cm), 230 inches (575cm), 240 inches (600cm), 250 inches (625cm), 260 inches (650cm), 270 inches (675cm), 280 inches (700cm), 290 inches (725cm), 300 inches (750cm), 310 inches (775cm), 320 inches (800cm), 330 inches (825cm), 340 inches (850cm), 350 inches (875cm), 360 inches (900cm), 370 inches (925cm), 380 inches (950cm), 390 inches (975cm), 400 inches (1,000cm), 410 inches (1,025cm), 420 inches (1050cm), 430 inches (1150cm), 440 inches (1175cm), 450 inches (1200cm), 460 inches (1225cm), 470 inches (1250cm), 480 inches (1275cm), 490 inches (1300cm), 500 inches (1500cm), 510 inches (1525cm), 520 inches (1600cm), 530 inches (1625cm), 540 inches (1700cm), 550 inches (1725cm), 560 inches (1800cm), 570 inches (1825cm), 580 inches (1925cm), 590 inches (1950cm), 600 inches (2000cm), 610 inches (2050cm), 620 inches (2100cm), 630 inches (2125cm), 640 inches (2250cm), 650 inches

Slide rules are essential tools for measuring and marking objects. There are many different kinds of slide rule available today. Some are designed specifically for engineers while others are intended for general purposes. Here we discuss the most common types of slide rules and explain why each type has its own advantages and disadvantages.

Types of Slide Rules

There are two main categories of slide rules - mechanical and electronic. Mechanical slide rules consist of a series of scales which are moved along a track to indicate measurements. Electronic slide rules contain a digital display which shows the measurement directly. Both types of slide rules require a ruler to be placed next to the scale to measure distances.

Mechanical Slide Rule

The earliest form of slide rule was invented in 18th century England. It consisted of a long strip of paper rolled into a tube. As the user turned the handle, the strip unrolled and the distance between the end points indicated the length of the object being measured. Mechanical slide rules are still widely used today. However, they are bulky and difficult to transport. Most modern versions of these devices include batteries and a small motor to turn the dial.

Electronic Slide Rule

An electronic slide rule consists of a digital readout. Instead of turning a crank, users press buttons to change the reading displayed on the screen. Electronic slide rules are smaller and easier to carry around than mechanical slide rules. However, they lack the accuracy of mechanical slide rules. Many manufacturers now produce both mechanical and electronic slide rules.


A ruler is a tool used to mark lines and angles on drawings. A straight edge is attached to a piece of material (such as cardboard) and is used to draw parallel lines. Angles are marked using protractors or dividers. Dividers are used to divide angles into equal parts. Protractors are used to multiply angles. Ruler sticks are used to measure lengths.


A protractor is a special kind of divider. It contains markings for dividing angles into degrees and minutes. The angle is divided by drawing a line across the center of the circle. The degree is determined by counting the number of divisions on either side of the central line. For example, 30° = 1⁄4

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