电动工具一般确实是标空载转速, 但标准没有强制要求标:
8.6 If units or technical data are expressed by symbols, the following symbols shall be used:n0 ............................ no-load speed
8.1 Tools shall be marked with:
– the year of manufacture.
– rated voltage(s) or rated voltage range(s), in volts. Tools for star-delta connection shall be
clearly marked with the two rated voltages (for example 230 Δ/ 400 Y);
– symbol for nature of supply, unless the rated frequency is marked. The symbol for nature
of supply shall be placed next to the marking for rated voltage;
– rated input, in watts or rated current, in amperes. The rated input or current to be marked
on the tool is the total maximum input or current that can be on circuit at the same time. If
a tool has alternative components which can be selected by a control device, the rated
input or rated current is that corresponding to the highest loading possible;
– name or trade mark or identification mark and address of the manufacturer or any other
agent responsible for placing the tool on the market;
– model or type reference;
– symbol for class II construction, for class II tools only;
– IP number according to degree of protection against ingress of water other than IPX0. If
the first numeral for the IP numbering is omitted, the omitted numeral shall be replaced by
the letter X, for example IPX5;
– “WARNING – To reduce the risk of injury, user must read instruction manual” or the sign
M002 of ISO 7010 F
8).
If used, the word “WARNING” shall be in capital letters not less than 2,4 mm high and
shall not be separated from the cautionary statement.
If used, the statement shall be verbatim except the term “operator’s manual” or “user
guide” may be used for the term “instruction manual”;
Additional markings are allowed, provided they do not give rise to misunderstanding. 如果是电动机或motor，标的是理论转速。一般鼠笼式电动机有转速差，即转子转速滞后定子内的磁场转速。电动类器械的实际空载输出转速比理论转速只差一点点。作为一个机械设计人员，电动类器具铭牌上的转速是通过其它参数决定的。如所需的整体功率，所要输出的转速。再来决定所需要电动类器械的原始输入转速。但一部机械的设计，设计人员应最关心的是电动类器械的输出功率和转矩，其次才是转速。 标准没有要求说一定要显示转速
名牌上的转速 大部分都是标明空载转速
但是也看过一些 是标明最高转速
看厂家而异 带额定负载时的额定转速.
