ANSI B175.4:2018 pdf download.Outdoor Power Equipment一Portable, Handheld,Internal Combustion Engine- Powered Cut-Off Machines一Safety and Environmental Requirements.
ANSI B175.4 applies to portable, handheld, internal combustion engine-powered machines, which use a rotating cut-off (abrasive) wheel that is center-mounted on and driven by a spindle shaft, and designed for cutting construction materials such as asphalt, concrete, stone, and metal.
The requirements in this standard apply to machines using up to 16 in (400 mm) nominal cut-off wheels. If the machine is designed for larger than 16 in (400 mm) nominal cut-off wheels, the requirements of this standard shall be considered. The requirements listed may apply to machines designed for larger cut-off wheels.
Cut-off wheel design and safety specifications are not included in this standard.
The effective implementation date of this standard shall be two (2) years after the publication date and shall apply to all products built after that date. Manufacturers may also comply with the requirements of this standard any time after the publication date.
“ANSI/OPEl B1 75.4-2018” and “ANSI B1 75.4-2018” may be used interchangeably wherever referenced or required in this standard.
1.1. Purpose
This standard establishes safety and environmental requirements to reduce the risk of injury associated with the use of portable, handheld. internal combustion engine-powered machines using a rotating cut-off (abrasive) wheel.
2. Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this American National Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ANSI B7.1 -2017, Safety requirements for the use, care, and protection of abrasive wheels
3.1. Abrasive cut-off wheel
An abrasive wheel designed to be used on portable, handheld, cut-off machines with dimensions and provisions as given in this standard.
Speeds of abrasive cut-off wheel(s) used on portable, handheld, cut-off machines in this standard shall correspond to Clause 7 of ANSI B7.1, Special Speeds, for wheel speeds exceeding 80 rn/s (15748 fpm).
NOTE — Tests in this standard should be conducted with wheels that comply with ANSI B7.1 unless otherwise noted.
3.2. Arbor hole
The center hole of the cut-off wheel used for mounting the wheel on the machine spindle.
3.3. Blotter
Compressible discs or washers usually of blotting paper stock, plastic, cardboard or gasket material, used between the cut-off wheel and flanges when mounting.
3.4. Choke control
A control that is used to enrich the carburetor fuel/air mixture to aid starting.
3.5. Clutch
A device for connecting and disconnecting a driven member to and from a rotating source of power.
3.6. Flange assembly
A device provided to clamp and drive the cut-off wheel.ANSI B175.4 pdf download.