Electric cutting tools are electrically powered devices driven by alternating or direct current, used to cut, slice, grind or shear materials. These tools are available in portable and stationary types, for consumer or industrial applications in construction, manufacturing, metalworking, woodworking, demolition and other sectors. UL 60745 is the US standard for electric cutting tools.

UL 60745 covers the following electric saws: band saws, chain saws, cutoff saws, circular saws, concrete saws, cut-off saws, door frame saws, jigsaws, miter saws, pole pruners, radial arm saws, reciprocating saws, scroll saws, table saws and tile saws. Other covered products include angle grinders and polishers, hand-held grinders, laminate trimmers, log splitters, sanders, shears and nibblers.

UL 60745 does not cover fuel-powered tools, pneumatic tools, hand cutting tools, or standalone accessories sold separately without the electric tool.

General Requirements of UL 60745

1. Electrical Safety:

   • Insulation system: Class I (earthed/grounded) / Class II double insulation; cold-state insulation resistance, hot-state insulation resistance; dielectric withstand voltage test;

   • Earth continuity: The resistance of the earth circuit for Class I tools ≤0.1Ω, and shall not fail when subjected to 25A current;

   • Leakage current: ≤0.25 mA for Class II double-insulated tools;

   • Temperature rise and locked-rotor test: The temperature rise of windings and enclosures under normal load and locked-rotor conditions shall meet the limits of insulation classes, with no ignition;

   • Power cord: Tensile, torsion and bending endurance; requirements for North American power cord types and plugs.

2. Mechanical Safety:

   • Spring impact test on enclosure, 1 m drop test onto concrete;

   • Guarding for moving parts; hazardous moving parts shall not be accessible by test finger;

   • Switch endurance, prevention of unintended start-up;

   • Handle strength; auxiliary handles are required for heavy-weight tools;

   • Inspection of fasteners and internal wiring construction.

3. Marking, Instructions and Warnings:

   • Nameplate: rated voltage, power/current, model number, classification marking, UL mark; the instruction manual must contain warnings against misuse, maintenance instructions, and safety notices for consumable replacement (sand belts, sanding pads).

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