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Patented by Isaac Babbitt as a bearing metal due to it's excellent low friction properties.
11.11 % Copper 66.66 % Tin 22.22 % Antimony
Gears fitted to a machine to increase the number of spindle speeds obtainable with a cone or step pulley belt drive.
See also: Lathes.
The angular surface ground back from the cutting edge of cutting tools. On lathe cutting tools. the rake is positive if the face slopes down from the cutting edge toward the shank, and negative if the face slopes upward toward the shank.
The lost motion or looseness (play) between the faces of meshing gears or threads.
A power saw. the blade of which is a continuous, narrow, steel band having teeth on one edge and passing over two large pulley wheels.
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Metal bars of various lengths, made in flat, hexagon, octagon, round, and square shapes from which parts are machined.
Threads, parts, tools, and sizes that are not standard, such as 'bastard nuts,' "bastard plus," "bastard fittings,' and so forth. The term also refers to a standard coarse cut file.
Chemical name: Hydrated aluminium
Chemical formula: Al2O32H2O
See also: Aluminium, Chemical Table.
A very hard wood almost unaffected when exposed to water. Therefore, it is used for keels of ships and flood gates. On account of its hardness it was used for wheels and railway sleepers.
See also: Lathes.
A very tough and elastic timber used for oars, blocks and pulleys, spokes of wheels and milk-pails. However, it is not very flexible and is difficult to work. Ash bark is used tanning and the ashes of ash is used for potash.
See also: Timber.
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As per the name bells are cast from this.
80 % Copper 20 % Tin
The flaring or tapering of a machined hole, usually made at the entrance end because of misalignment or spring of the cutting tool.
A small lathe mounted on a bench or table.
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Rectangular or square bar of raw material.
Strong flexible wood that has many uses. Amongst the uses are furniture making, building as well as being used for agricultural implements in the past.
See also: Timber.
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92 % Aluminium 7 % Molybdenum 1 % Manganese
This is a numbering system for sheet metal gauge. more......
Chemical name: Calcium hypochlorite
Chemical formula: CaCl(OCl)
See also: Chemical Table.
A hole made in a workpiece that does not pass through it.
See also: Drill Bits.
A defect in a casting caused by trapped steam or gas.
See also: Cast Iron.
Chemical name: Copper Sulphate
Chemical formula: CuSO45H2O
See also: Chemical Table.
See also: B.A. Threads.
Chemical name: Sodium tetraborate
Chemical formula: Na2B4O710H2O
See also: Chemical Table.
To enlarge and finish the surface of a cylindrical hole by the action of a rotating boring bar (cutting tool) or by the action of a stationary tool pressed (fed) against the surface as the part is rotated.
A combination tool holder and shank.
A boring tool is used to enlarge a cylindrical hole, sometimes the tool bit the boring bar and the tool holder are incorporated in one solid piece.
Very compact hard wood suitable for machining small parts from.
See also: Timber.
Brass is an alloy of copper and zinc, but often other elements such as aluminium, iron, manganese, tin and lead are added. more......
2 % Copper 90 % Tin 8 % Antimony
See: B.A. Threads
See: S.W.G. British Imperial Wire Gauge
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A long, tapered cutting tool with serration's which, when forced through a hole or across a surface, cuts a desired shape or size.
Bronze is an alloy of copper and tin. However, the name is now applied to other alloys that do not contain tin. more......
To polish to a smooth finish of high luster with a cloth or fabric wheel to which a compound has been added.
The large crank gear of a shaper.
The process of finishing a metal surface by contact with another harder metal to improve it. To make smooth or glossy by or as if by rubbing; polish.
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The sharp edge left on metal after cutting or punching.
or
A rotary cutting tool designed to be attached to a drill.
A sleeve or a lining for a bearing or a drill jig to guard against wear.
Chemical name: Zinc chloride
Chemical formula: ZnCl23H2O
See also: Chemical Table.