IEC 60745-1 6mm Steel Ball

Steel Ball 6mm diameter as per IEC60745-1 Sub-clause 21.37 Air intake shall not enable the ingress of foreign bodies that could impair the safety.

Compliance is checked by the following test: It shall not be possible to insert a steel ball of 6 mm diameter through the air intake openings other than those adjacent to the fan.

Standard:
IEC 60745-1 “Hand-held motor-operated electric tools – Safety – Part 1: General requirements” clause 21.37