Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-807 - Portable power tools › Section 296-807-099 - Definitions

Current through Register Vol. 24-14, July 15, 2024
Abrasive wheel.
A grinding tool consisting of
				bonded abrasive grains. This includes diamond and reinforced wheels.
Blind hole.
A hole drilled in an object, such as
				an abrasive wheel, that does not go all the way through.
Blotter.
A compressible disc or washer, usually of
				blotting paper, plastic, cardboard, or gasket material, that is used between
				the wheel and the flanges to evenly distribute flange pressure on the
				wheel.
Cone and plug wheels (Types 16, 17, 18, 18R, and
				19).
Abrasive wheels manufactured with blind hole threaded bushings.
				They may be used on all surfaces except the flat mounting surface (D). Specific
				characteristics of the different cone and plug wheels are:
(a) Type 16 cones have a curved side with a nose radius;
(b) Type 17 cones have straight sides with or without a nose
				radius;
(c) Type 18 and 18R plug wheels are cylindrical in shape with
				either a square or curved grinding end;
(d) Type 19 cone wheels are a combination of cone and plug
				shapes.
Cutting-off wheels.
Abrasive wheels used to cut
				material such as masonry, pipe, etc.
Designated person.
A person selected or assigned
				by the employer or the employer's representative as competent to perform
				specific duties.
Discharge opening.
An opening in a mower housing
				for discharging grass.
Flanges.
Collars, discs, or plates between or
				against which wheels are mounted. There are four types of flanges:
(a) Adaptor;
(b) Sleeve;
(c) Straight relieved;
(d) Straight unrelieved.
Grass catcher.
Parts or a combination of parts to
				collect grass clippings or debris.
Guard (abrasive wheels).
An enclosure designed to
				restrain the pieces of an abrasive wheel and furnish protection to the operator
				if the wheel is broken during operation.
Guard.
A part or assembly to prevent accidental
				contact with hazardous machine parts or to protect persons from other hazards
				created by the machinery.
Inorganic bonded wheel.
Abrasive wheels that are
				bonded by means of inorganic material such as clay, glass, porcelain, sodium
				silicate, magnesium oxychloride, or metal.
Jack.
A portable hand- or power-operated mechanism
				for lifting, lowering, or moving horizontally a load by applying a pushing
				force.
Modified Types 6 and 11 wheels (terrazzo).
Similar
				to Type 6 "straight cup" wheels and Type 11 "flaring cup" wheels except for the
				bottom of the cup. The bottom of the cup is flat in Type 6 and 11 wheels. The
				modified wheels have bottoms that are sloped downwards towards the mounting
				hole. These modified wheels need to be mounted using a special tapered flange
				furnished by the tool manufacturer. These wheels are used in the terrazzo
				trade.
Mounted wheels.
Bonded abrasive wheels of various
				shapes, usually two inches diameter or smaller, that are secured to plain or
				threaded steel mandrels.
Normal service (jacks).
Raising or lowering axial
				loads that are eighty-five percent or less of the rated load under controlled
				conditions.
Organic bonded wheels.
Abrasive wheels that are
				bonded by means of organic material such as resin, rubber, shellac, or other
				similar bonding agent.
Rated load.
The maximum load that the jack is
				designed to lift or support.
Reinforced wheels.
Organic bonded abrasive wheels
				which have webbing, fabric or filament to provide resistance to complete
				breaking of the wheel should it become cracked or damaged.
Terrazzo.
A material of stone chips, such as
				marble, set in mortar and polished.
Threaded hole wheels.
Abrasive wheels that have
				one central threaded bushing, securely anchored in place. They are mounted by
				being screwed onto a threaded machine spindle so that the wheel back seats
				firmly against an unrelieved flat back flange.
Tuck pointing wheels.
Tuck pointing abrasive
				wheels are Type 1 reinforced, organic bonded wheels and have diameter,
				thickness and hole size dimensions. They are used to remove cement, mortar, or
				other nonmetallic jointing material.
Type 1 wheel.
An abrasive wheel shaped like a disc
				with a mounting hole in the middle. Sometimes called a "straight wheel." It has
				diameter (D), thickness (T), and hole size (H) dimensions. Grinding is normally
				done on the periphery (outside curve) of the wheel (T dimension). Can be used
				for grinding, cutting-off, and tuck pointing.
Type 2 wheel.
An abrasive wheel shaped like an
				open-ended, hollow cylinder. Sometimes called a cylinder wheel. It has diameter
				(measured from the outer wall of the cylinder), wheel thickness (height of the
				cylinder), and rim thickness (thickness of the cylinder wall). Grinding is done
				on the end of the cylinder (rim thickness dimension).
Type 6 wheel.
An abrasive wheel shaped like a
				straight-sided cup or bowl with a mounting hole in the bottom of the cup.
				Sometimes called a "cup wheel." It has diameter (D), thickness (T), hole size
				(H), rim thickness (W), and back thickness (E) dimensions. Grinding is normally
				done on the cup rim (W dimension).
Type 11 wheel.
An abrasive wheel shaped like a cup
				or bowl with a mounting hole in the bottom of the cup. The sides of the cup are
				not straight-sided but are angled outward. Sometimes called a "flaring cup
				wheel" since the sides are "flared" out. It has double diameter dimensions (top
				D and bottom J). It also has thickness (T), hole size (H), rim thickness (W),
				and back thickness (E) dimensions. Grinding is normally done on the cup rim (W
				dimension).
Type 16, 17, 18, 18R, and 19 wheels.
See cone and
				plug wheels.
Type 27 wheel.
An abrasive wheel similar to a Type
				1 wheel, but the center of the wheel around the mounting hole is pushed back
				(depressed). Sometimes called a "depressed center" wheel. It has diameter (D),
				thickness (U) and hole size (H) dimensions. The depressed center allows
				grinding on the flat surface of the wheel without interference from the flange
				or mounting hardware.
Type 27A cutting-off wheel.
Similar to a Type 27
				wheel. Specifically designed for use on cutting-off machines.
Type 28 wheel.
An abrasive wheel similar to a Type
				27 wheel, but the face of the wheel is angled upward and away from the mounting
				hole. The face of a Type 27 wheel is flat and perpendicular to the mounting
				hole. A Type 28 wheel is also called a "depressed center" wheel. It has
				diameter (D), thickness (U), and hole size (H) dimensions. The depressed center
				allows grinding without interference from the mounting. A Type 28 wheel has a
				saucer-shaped grinding rim and is designed for corner grinding and side
				grinding.
Type 29 wheel.
An abrasive wheel that has
				reversed, saucer-shaped grinding rims (similar to a partially opened
				umbrella).