G4003 Inspection Report · Mar 4, 16:00
For those of you looking to purchase a standard G4003 12×36lathe from Grizzly, you may be wondering about its accuracy from the factory.
Here’s our inspection report: (units is MM, NOT inches!)
Tailstock Way Alignment 0.016
Spindle Center Runout 0.01
Spindle Nose Runout 0.01
Spindle Taper Runout 0.02 (indicator reading at end of 12” test bar) 0.006 (at end of spindle nose)
Headstock Alignment Vertical 0.015
Headstock Alignment Horizontal 0.01
Tailstock Spindle Alignment Horizontal 0.01
Tailstock Spindle Alignment Vertical 0.021
Tailstock Taper Alignment Horizontal -0.01
Tailstock Taper Alignment Vertical 0.02
Vertical Aligment of Head and Tail Centers 0.05
Face Plate Runout 0.02 (on diameter) 0.05 (on face at normally diameter)
Chuck Runout 0.05 (face and periphery) 0.05 (face of steps) 0.06 (bar test 75mm from end of jaw bar diameter same as hole)
Lathe Must Turn Round With Work Mounted In Chuck (0.01)
Lathe Must Turn Cylindrical On A 6 Inch Length Of Work Piece Mounted In A Chuck 0.02
Lathe Must Turn Cylindrical On A 6 Inch Length Of Work Piece Mounted On Centers 0.015
That’s pretty darn good!
Here are the scans from our report (click on image to enlarge):
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