Historical reference. The source contains unclear technical values or wording and has not been validated as current operating guidance. Refer to the instructions for the specific product and applicable safety requirements.
1. The source states that cutting equipment should be sharp, intact and installed correctly and securely.
2. It refers to grinders operating above 10000r / min and requirements for wheel quality and installation. It calls for checking and securing the wheel and pad without overtightening the nut, rejecting wet, deformed, cracked, broken, chipped or oil/alkali-contaminated wheels, and includes unclear wording about self-drying wet wheels.
3. Handheld tools operate at high speed and vibration while in contact with the body. For damp locations or conductive metal structures, pressure vessels and pipes, the source calls for tools with double or reinforced insulation; its wording is partially unclear.
4. During storage and use, the source says that engineering-plastic housings should be protected from crushing and damp and kept away from petrol and other solvents.
5. Checks before operation should meet the following requirements:
The original article lists these pre-use checks for handheld power tools:
(1) No cracks or damage to the housing and handle.
(2) Intact cables and plugs, normal switch operation and correct, secure protective neutral connections.
(3) Complete, secure guards and reliable electrical protection.
6. The source calls for a no-load run after starting and checking that the mechanism moves freely. It describes steady force without excessive pressure during work.
7. Overloading is prohibited. The source calls for attention to sound and temperature rise and stopping on abnormal operation. Its sentence about extended use, "60 degrees" and natural cooling is unclear; the value and ambiguity are retained rather than corrected.
8. Do not touch cutting tools, dies or grinding wheels during operation. The source describes switching off before repairing or replacing dull or damaged parts.
9. The source describes the risk of losing control of a handheld tool, damaging the workpiece or tool, and causing injury. It then says not to move a machine while it is rotating.
10. The source lists the following for impact drills or hammers:
(1) Hold the handle and place the bit at the work surface before starting. Use moderate force, reduce force when speed drops sharply to avoid overload, and do not press on an operating lever.
(2) Avoid reinforcing bars when drilling concrete.
(3) "40% rotary hammer drill and intermittent working system should be used continuously for a long time" [contradictory source wording retained without correction].
(4) For holes larger than 25mm, the source calls for a stable working platform with surrounding barriers.
