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.
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.
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.
FAQs
What are the four general tool rules? Purchase quality tools, keep tools organized, keep tools clean, and use the right tool for the right job.
What is the steel rule tools? ›
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.
What is the standard steel rule? ›
Steel rules come in many sizes and formats. Basic 6" and 12" steel rules come in flexible and rigid forms. Flexible rules are usually ½" wide and 1/64" thick. Starrett calls flexible rules “semi-flexible.” Rigid rules are usually ¾" wide and 3/64" thick.
What is the difference between a scale and a steel rule? ›
In scientific and engineering terminology, a device to measure linear distance and create proportional linear measurements is called a scale. A device for drawing straight lines is a straight edge or ruler. In common usage, both are referred to as a ruler.
What is the minimum reading of steel rule? ›
Steel rules are made of spring steel or stainless steel. These rules are available in lengths of 150 mm, 300 mm, and 600 mm. The reading accuracy or least count of the steel rule is 0.5 mm and 1/64 inch.
How do you calibrate steel rules? ›
There are four steps for calibration process, (1) the ruler or tape should be aligned and fixed on the guideway of the calibration system. (2) the starting point should be selected where you should check if the ruler- start side is clear or damaged. (3) press zero at this start side.
What are the four basic rules a technician should follow regarding tools? ›
Use good quality tools. Keep tools in good condition at all times. Inspect tools for defects before use. Replace or repair defective tools.
What are four vise rules? ›
Four vise rules include cleaning the vise before use, ensuring the object is securely held, avoiding the use of a damaged vise, and maintaining correct alignment between the vise's jaws and the object.
How do you use a steel rule accurately? ›
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 8). The end of a rule is often rounded off from misuse, and a true measurement will not be made.
What should the steel rule never be used as? ›
Follow these guidelines concerning steel rules: Never use a rule to open cans. Never use a rule as a screwdriver to loosen screws. Never use a rule to clean chips in tight comers.
CLEANING STEEL RULER
Don't use harsh chemicals that may damage the ruler's markings. Then wipe the ruler with a soft, lint-free cloth or a damp cloth to remove dust, dirt, and any debris. Then the last part is to dry the ruler thoroughly after cleaning to prevent rusting.
What are the safety rules for machine shop? ›
Do not wear thin fabric shoes, sandals, open-toed shoes, and high-heeled shoes. A machinist's apron tied in a quick release manner should be worn ideally. Always keep hands and other body parts a safe distance away from moving machine parts, work pieces, and cutters.
What is the steel rule in engineering workshop? ›
Engineer's steel rules are used to measure the dimensions of workpieces. Steel rules are made of spring steel or stainless steel. These rules are available in lengths of 150mm, 300mm, and 600 mm. The reading accuracy of the steel rule is 0.5 mm and 1/64 inch.
What is the classification of steel rule? ›
General offers Machinists and Engineers three classes of steel rules: economy (good), industrial (better) and UltraTest (best).
What are the four ways in which a work part can be held in a lathe? ›
Methods of holding the work in a lathe include: (1) between centers, (2) chuck, (3) collet, and (4) face plate.
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.