Historical reference.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 generally specifies Class II handheld power tools and a leakage protection device with a rated operating current no greater than 15mA and a rated operating time of "less than 0. seconds" [incomplete value in the source]. For Class I tools it additionally specifies "zero-position protection" [source wording]. Operators are described as wearing insulating gloves and boots or standing on an insulating mat.
2. For wet locations or work beneath metal frames, the source specifies Class II handheld power tools with splash-resistant leakage protection and prohibits Class I handheld tools.
3. For confined places such as boilers, metal containers and wastewater pipes, the source specifies Class III handheld tools with an isolating transformer. For Class II portable tools it refers to a leakage protection arrangement. It states that the isolating transformer or leakage protector is installed in the confined place and monitored during work [source wording retained].
4. The load cable is described as a weather-resistant rubber-sheathed copper cable without joints. The source prohibits "plastic yarn" [source wording].
5. The source rejects grinding wheels that are wet, deformed, cracked, broken, damaged at an edge or contaminated with oil or alkali. It states that wet grinding discs must not dry by themselves. Wheels and disc pads are to be firmly installed without overtightening the nut.
6. The source lists the following checks before work:
(1) No cracks or damage to the housing or handle.
(2) Correct and secure protective neutral connections; intact cables and plugs; normal switch operation.
(3) Reliable electrical protection and complete mechanical guards.
7. The source says: "Start air transmission and check that the tool operates flexibly and without obstruction" [unclear source wording].
8. The source refers to portable grinders, angle grinders and a plexiglass cover, then says to maintain balance and avoid excessive force when operating a "reheating furnace" [unclear source wording retained].
9. Overloading is prohibited. The source calls for attention to sound and heat, stopping for inspection on abnormal operation and allowing natural cooling after prolonged use.
10. The source says not to touch cutting tools, dies or grinding wheels during operation and to stop for repair or replacement when dullness or damage is found.
11. "The machine must not run" [source sentence retained without adding an interpretation].
12. Notes on using an electric drill:
(1) The source says the drill bit should work on the workpiece and not be struck while unloaded [unclear source wording].
(2) Avoid reinforcing bars when drilling concrete.
(3) Keep the tool perpendicular to the workpiece and avoid wobbling in the hole.
(4) For impact drilling over 25mm, the source specifies a barrier around the work area and a stable platform for elevated work.
13. The source states a grinding-wheel safe peripheral speed of "80 m / min" and a 15-30 degree angle between the wheel and work surface. It states that the wheel should not be tilted when cutting. The original values are preserved here and have not been validated.
