Tailstock centre unsteady
Nantong QN6004, combination lathe / drill / mill / shaper
Possible cause
Worn sleeve or hole
What to do
Manufacturer's manual, p. 38Repair hole, fit matching centre sleeve
Other Nantong QN6004 faults
Workpiece turns oval or ends run out; chatter when notchingSpindle bearing clearance too large or bearings wornIrregular ripples on finished surfaceWorn spindle roller bearing raceExcessive axial play of spindleThrust bearing clearance
From the manufacturer's manual “EM-18 -1 UNIVERSAL MACHINE TOOL”. Check against the original on board before work.