What is a steel rule? A steel rule is exactly what it sounds like... a rule manufactured from either spring or stainless steel that feature either metric or imperial (or both) scales along its length. One end is usually flat whilst the other end (frequently including a hole for hanging) is usually round.
What is steel foot rule?
This rule is made by joining four pieces of 6 inches. These pieces are either wooden or of steel. It is generally used by the carpenters and masons, by unfolding this rule we can take measurement up to 2 feet. When we fold it, it is reduced to 6″.
How do you use steel rule step by step?
https://www.youtube.com/watch?v=0KXPuBUdDtw
What is made of steel rule?
The material that a steel rule is made of is also important to the quality. Good steel rules are made from high-carbon spring steel that is hardened and tempered to Rc 47-52. They are chrome plated, usually with a satin finish, for corrosion resistance and readability.
What is the tolerance for a steel ruler?
1/64"
Is it possible to measure to 1/64 of an inch with a steel rule?
A 1/64" graduate scale means that in a 1-inch length, there are 64 lines dividing that inch (Figure 3). These are the smallest graduations on the rule, therefore making the accuracy of a steel rule 1/64". This is sometimes argued by some of the metal workers who say they can measure to within ±. 003 with the rule.
What is the accuracy of caliper using with steel rule?
Calipers are used along with steel rules, and the accuracy is limited to 0.5 mm; parallelism of jobs, etc.
Why is a steel rule so useful?
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.
Should rulers be calibrated?
With regards to the simple steel ruler (or any other measuring equipment), if you are using it to measure or monitor product or process quality then it needs to be calibrated.
What makes a steel rule more accurate?
Both the long edges and the ends of steel rules should be ground for straightness and accuracy. Ends that are ground square, and in proper relationship to the graduations allow accurate measurements from the ends of the steel rule. A properly made steel rule will have virtually no error in the graduations.
How is calibration done?
Although the exact procedure may vary from product to product, the calibration process generally involves using the instrument to test samples of one or more known values called “calibrators.” The results are used to establish a relationship between the measurement technique used by the instrument and the known values.
A measuring device should be calibrated: According to the recommendation of the manufacturer. After any mechanical or electrical shock. Periodically (annually, quarterly, monthly)