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Each type of fully automatic screw locking machine has different requirements for screws, so not all screws are universal.

Multi axis series, turntable series, and fixed fully automatic screw locking machines are generally suitable for M2~M6 screws. During this period, it is required that L>1.2D (L indicates the total length of the screw, D indicates the diameter of the screw cap)

The suitable length of desktop suction type active screw locking machine should not exceed 10mm screws. But screws can be relatively short.

Handheld fully automatic screw locking machines are generally suitable for M1-M8, L>1.2D.

Screw placement machines are generally suitable for M2-M5 screws, with one length not exceeding 20mm.