Servo Electric tapping machine-Manuals Instruction-10
ADJUSTING flexible arm tapping machine TAP HOLDER TORQUE SETTINGS
The torque adapters are factory preset near the standard break torque limits developed for each tap size. The break torque limit protects the tap when blind or bottom holes in mild steel (approximately 229 BHN or 25RC) When the tap reaches the bottom of the hole, resistance will cause the torque holders safety clutch to ratchet and stop the tap from turning, over-torquing and ultimately breaking.
When flexible arm tapping machine tapping hardened steel (above 40 RC), stainless steel, or other tough alloys, an increase in the factory torque settings may be required in order to drive the tap the full depth of the hole. When using the torque adapters to tap soft materials or plastics, a decrease in factory torque setting prevents the tap from over torquin after it reaches the bottom of the hole (see "Torque Requirements for Tapping' page of this manual).
There are two lock positions (see holes at positions A and B in the diagram) on the outside diameter of the adapter designed to hold the tail of the snap ring. These two positions permit on adjustment range from one half to a full notch on the threoded ring. The tail of the snop ring must be inserted in the hole at either position and through a notch on the thread ring in order to lock in the adjusted torque setting.
CAUTION: Never adjust the flexible arm tapping machine torque setting more than one (1) notch at a time. Adverse tapping conditions and broken taps may result.
NOTE: AFTER TURNING THE THREAD RING A FULL NOTCH, REINSERT THE TAIL OF THE SNAP RING IN THE ORIGINAL
HOLE (POSITION A). IF A LESSER ADJUSTMENT IS NEEDED, TURN THE ADJUSTING THREAD RING HALF THE DISTANCE
BETWEEN THE THREAD RING'S NOTCHES. ROTATE THE SNAP RING AND INSERT THE TAIL IN THE HOLE LOCATED AT POSITION B.