Tramming a Rong-Fu Drill/Mill - Home Metal Shop Club

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Supporting <strong>Drill</strong> Chuck Nice For Tapping.• I like T shaped tapwrenches with a centerpost that fits in drillchuck.• Less likely to break tapsthis way.
• Attempt to tap 8-32 threadsresulted in broken tap.• Investigation revealed #29 drillwas too small by 0.004 inches…cheap drills ($75).• Only 10% of numbered drillscorrect. Most too small by0.002 to 0.004 inches.• Only 4 of 26 alphabetic drillscorrect. Errors of 0.006 andmore.• None of the fractional drillswere correct.• ½ inch drill was too small by0.015.Tapping problems
Page 1 and 2: TRAMMING A RONG FUMILL/DRILLbyNorm
Page 3: The Rong Fu Mill/Drill• 1.5 horse
Page 7 and 8: • Placing carefullyselected shims
Page 9 and 10: Tramming with a dial indicator• L
Page 11 and 12: • Made a ¾ mild steelmandrel wit
Page 13 and 14: An alternative to shimming• Cut f
Page 15 and 16: Realities of jam nuts• Preliminar
Page 17 and 18: Future Things To Try• Spindle squ
Page 19 and 20: Adjustable Parallel Drawing
Page 21 and 22: Setup with adjustable parallel• I
Page 23 and 24: Setup with adjustable parallel• I
Page 25 and 26: Why two vises?• I prefer to use a
Page 27 and 28: Making an adjustable parallel• Us
Page 29 and 30: Milling a parallel to correct heigh
Page 31 and 32: Milling a parallel to correct heigh
Page 33 and 34: • Setup workpiece.• Drill two h
Page 35 and 36: • Setup to mill notch with ¼inch
Page 37 and 38: Setup to drill set screw hole• Pu
Page 39 and 40: Making a lead dimple• Use center
Page 41: Drilling final hole before tapping
Page 45 and 46: Hard learned lessons about drilling
Page 47 and 48: • I tend to forget whichway the w
Page 49 and 50: Tapping Operations in Review
Page 51 and 52: Setup For Case Hardening• Neycraf
Page 53 and 54: • Polishing the adjustableparalle
Page 55 and 56: Result: A Box of Adjustable Paralle
Page 57 and 58: Where The Tools Came FromSource•

Tramming a Rong-Fu Drill/Mill - Home Metal Shop Club

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