This standard applies to electric hand-held tapping machines for internal threads and specifies requirements for safe
GOST R 50637-1994 history
2010GOST R IEC 60745-2-9-2010 Hand-held motor-operated electric tools. Safety and test methods. Part 2-9. Particular requirements for tappers
1994GOST R 50637-1994 Electric hand-held tools. Particular safety requirements and methods of testing tappers
GOST R 50637-1994 Electric hand-held tools. Particular safety requirements and methods of testing tappers was changed to GOST R IEC 60745-2-9-2010 Hand-held motor-operated electric tools. Safety and test methods. Part 2-9. Particular requirements for tappers.