Aug 04, · A steel rule is a simple measuring instrument that is used for measuring distances and ruling straight lines. It is used in diverse fields, such as geometry, technical drawing, engineering and construction. The steel rule is a very common measuring tool. The steel rule is a basic measuring tool. When used correctly, a good steel rule is a surprisingly accurate measuring device. What is a steel rule? Some people confuse rules and scales. A scale is a measuring device used by architects and engineers that assists them in making drawings to a scale other than full size. A rule is used to measure.
Inspection Methods - The Steel Rule. Steel Rule Measurement. With the technical advances being made, most people are inclined to think that complex electrical measuring equipment is needed to inspect parts made by the machinist or toolmaker. Although this is true in some cases, the majority of the parts that are made do not require this sophisticated equipment.
Figure 1 The rigid six-inch rule is a common measuring tool found in the machine shop. The rule is a strip of metal graduated in inches and fractions of an inch to give actual measurements. When tolerances of fractional dimensions are required, the steel rule is used. The most commonly used steel rule is the 6" rule. Although rules come in 6-inch increments Example: 6", 12", 18", 24", and 36" lengthsthe 6-inch rule is the most popular because it fits into the apron pocket easily.
It also comes in various widths and thicknesses to meet varying requirements, as will be seen in the slide series. Rules vs. The terms "rules" and "scales" are used in different ways by different workers, sometimes causing confusion. While some manufacturing workers do not differentiate between these terms, technoloyy use the term "rule" when referring to a measurement tool that provides actual linear measurements.
In other words one inch on the rule represents exactly one inch stsel linear distance. On the other hand, to these workers, a scale is a measurement tool in which an actual measured linear distance. Figure 2 : Architectural Scale Increment How to become a commodity trader. There are four basic divisions that are found on a fractional inch rule.
They are right for they have worked with it a long time and have become masters at reading the graduations. Figure 6 As you can see, a combination of two or more of the various graduations will make up a larger graduation.
Any combination of the four different sized graduations will give a reading up to the 1-inch length. Figure 7 is a decimal equivalent chart that shows all the various fractions possible in one inch. Figure 7. Now that you have this information under your belt, let's look at how a rule should be used. Figure 8 Figure 9 Even if the workpiece is held firmly against a reference surface, such as an angle plate Figure 9this will not assure an accurate measurement if the end of the rule is wnat off.
Figure 10 When measuring a length, the rule must be kept in a straight line parallel to the centerline of the work. If it is tilted, the measurement will be longer than the actual part.
See Figure Correct Incorrect Figure 10 One other important factor in aaron lewis what hurts the most chords the rule is to be aware of parallax. This is uswd observation error techhnology the person measuring or holding at the part in relation to the part being held.
Incorrect Rule Lying Flat Correct Rule Standing on Edge Figure 11 In Figure 11, the drawing on the left shows an incorrect way of measuring, and parallax is greatly increased because of the thickness of the rule.
The graduations do not come in direct contact with the work. The arrows pointing to the right and left will cause parallax, and even though the what is meaning of gps pointing straight up is the correct way to view the rule, there is a chance for error in reading due to the thickness of the rule.
I drawing on the right shows what is a steel rule used for in technology rule on its edge. As can be seen, the graduation comes in contact with the work, which is the correct way of measuring. Although the arrows pointing to the right and left will cause an improper reading, it will not be as great an error as when the rule is used in the manner shown in the drawing on the left. The proper way is to view the graduation straight up as the whwt arrow illustrates.
All rights reserved. One tool that is very common in the machine shop area that is not a high precision measuring tool uwed the steel rule Figure 1.
Figure 1. For example, on an architect's scale Figure 2one inch of measured distance may represent one foot of actual linear distance. When this principle is in operation, a "key" should indicate the ratio of measured distance to actual distance or "scale" that is being used. Figure 2 : Architectural Scale. Let's look at each graduation a little closer. Figure 3. Figure 4. Figure 5. Figure 6. To get the full accuracy out of a rule, it is important to use it correctly.
Never use the end of the rule to align with the edge of the work for a measurement Figure uwed. The end of a rule is often rounded off from misuse, and a true measurement will not be made. Figure 8. Figure 9 Even if the workpiece is held firmly against a reference surface, such as an how to get internet without paying monthly plate Figure 9this will not assure an accurate measurement if the end of the rule is worn off.
To offset this, use an inch graduation as a reference point on the rule Figure Precision and reliable measurements are possible this way. With the graduation directly on the edge of the work, and by not using the end of the rule, wear is inconsequential. Figure Correct Incorrect. Figure 9. Even if the workpiece is held firmly against a reference surface, such as an angle plate Figure 9this will not assure an accurate measurement if the what is a steel rule used for in technology of the rule is worn off.
Incorrect Rule Lying Flat.
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The rigid six-inch rule is a common measuring tool found in the machine shop. The rule is a strip of metal graduated in inches and fractions of an inch to give actual measurements. When tolerances of fractional dimensions are required, the steel rule. A steel rule is the simplest and most common measuring tool. The flat steel rule is usually 6 or 12 inches long, but longer sizes are available. Steel rules can be flexible or nonflexible, thin or wide. The thinner the rule, the more accurately it measures, because the division marks are closer to the work. a steel ruler is used as an everyday ruler, just that it is steel for uses in dangerous uses like in wood work or metal work. hope my really bad info helped. you use it in technology and car.
Steel rules, also called rulers, are essential in any shop when accuracy matters. Steel rules are inherently more accurate than folding rules because they are made in one piece and so avoid the inaccuracies, however small, which are inherent in folding rules because of the to play in their hinges. The requirements for accuracy in steel rules vary greatly, however, and the range of products varies likewise. The differences in the prices of rules result from the various production methods, which also determine accuracy and legibility.
Most rules are made by cutting the required length from a roll of band spring steel, with etched graduations. Rules made by this method are adequate for most applications and reasonably priced. Higher-priced rules are cut, not stamped, from plate steel stamping would cause the material to warp , and the edges are ground.
Graduations are machined, much deeper than etched graduations, longer-lasting, and easier to read in poor light. Inc VAT Shipping is extra. Steel Rules, General Information. Steel rules come in rigid and flexible versions. While their primary purpose is accurate measurement, they can also be used as guides for laying out lines, and if rigid enough, for cutting.
The thinner, more flexible rules can also be used to measure rounded or cambered work. Shipping costs.