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2. Rebar spacer - Wikipedia

   en.wikipedia.org/wiki/Rebar_spacer

   The engineering study of every reinforced concrete construction, whether it is a building, a bridge, a bearing wall, or another structure, dictates the positioning of steel rebars at specific positions in the volume of concrete (predicted concrete cover of steel reinforcement bars). This cover varies between 10 mm and 100 mm.

3. Kelly tool - Wikipedia

   en.wikipedia.org/wiki/Kelly_tool

   The Kelly tool is named after its designer, Captain John F. Kelly of H&L Company 163 . It consists of a straight steel bar, generally about 28 inches long. [1] One end is formed into a chisel; the opposite end has a 90 degree adze. The primary advantage over the claw tool it replaced is that the striking end (the adze) is in a straight line ...

4. Tool steel - Wikipedia

   en.wikipedia.org/wiki/Tool_steel

   Tool steel is any of various carbon steels and alloy steels that are particularly well-suited to be made into tools and tooling, including cutting tools, dies, hand tools, knives, and others. Their suitability comes from their distinctive hardness , resistance to abrasion and deformation, and their ability to hold a cutting edge at elevated ...

5. Bar stock - Wikipedia

   en.wikipedia.org/wiki/Bar_stock

   There are four types of materials available: O-1 tool steel, A-2 tool steel, A-6 tool steel, and 1018 steel (low-carbon or low-carb steel). Lengths are either 18 or 36 in (457 or 914 mm) long, various widths up to 16 in (406 mm) are available, and thicknesses range from 1 ⁄ 64 to 2.875 in (0.40 to 73.03 mm).

6. Babbitt (alloy) - Wikipedia

   en.wikipedia.org/wiki/Babbitt_(alloy)

   Steel shims were used, as the brass shims used today tend to compress over time, contributing to shorter bearing life. The poured Babbitt bearings commonly get over 50,000 miles of use before needing replacement. Poured Babbitt bearings are also known to fail gracefully, allowing the car to be driven for extended periods of time.

7. Burnishing (metal) - Wikipedia

   en.wikipedia.org/wiki/Burnishing_(metal)

   The tool is usually hardened and coated with special materials to increase its life. Ball burnishing, or ballizing, is a replacement for other bore finishing operations such as grinding, honing, or polishing. A ballizing tool consists of one or more over-sized balls that are pushed through a hole.