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Tapered-stub End-mills, PCB Traces-isolation Bits (EM2E8, EM3E8) - 1/8 in. (0.125 in. shank )


Specifications

  • Geometry - 2 & 3-flute, 15° taper, P-stub tip
  • Length - 1.42 in. (36mm) 0.010 in
  • Tip angle - 15°  +0.0°, -2.0°
  • Diameter Tolerance - 0.0002" (0.005mm)
  • Shank dia. - 0.1250 in. (3.18 mm) +0.00, -0.0002 in.
  • Max runout (TIR) - < 0.0002 in.
  • Max. depth of cut - varies with tip diameter
  • Material - solid submicrograin carbide
  • Ring Set - 0.800 in. 0.004 in. (custom depth available)
  • Operating RPM - CNC certified operation 20k RPM to 100k RPM

Benefits

  • Optimized for trace isolation and copper rubout on printed circuit boards
  • 15° taper angle minimizes cut width variation due to poor substrate flatness
  • Spiral geometry insures efficient debris removal
  • Cutting edge geometry virtually eliminates chatter at high feed rates

Applications

  • Print circuit trace isolation
  • Copper rubout on printed circuit boards
  • Engraving plaques, awards, medallions, and labels
  • Custom jewelry fabrication and marking

Notes

  • What is a "Depth Ring"?
  • LPKF and T-Tech users must specify the make and model number of their CNC routers to insure that the rings are properly positioned!

Tutorials

Compatibility


Application Data (tool description for CAM software)

  • Tool Type: Tapered End-Mill
  • Diameter (D) = tip diameter
  • Included Angle (A, total angle) - 15°
  • Stepdown = Depth per Pass, Pass Depth - 1 tip dia. max.
    Minimum plunge depth = 0.0025" (0.064mm)
  • Depth of Cut (DOC):
    • 0.0039 in. dia. - 0.010 in. (0.25mm)
    • 0.0051 in. dia. - 0.010 in. (0.25mm)
    • 0.0071 in. dia. - 0.015 in. (0.38mm)
    • 0.0100 in. dia. - 0.020 in. (0.51mm)
    • 0.0150 in. dia. - 0.030 in. (0.76mm)
    • 0.0200 in. dia. - 0.030 in. (0.76mm)
    • 0.0250 in. dia. - 0.035 in. (0.89mm)
  • Stepover (for final cleanup pass) = 10% tip dia.
  • Stepover (for roughing, clearance pass) = 40% tip dia.
  • Spindle RPM (SPEED) = 5 KRPM to 60 KRPM
  • Feedrate (IPM) = Depends on the material being cut.
  • Plunge rate = 5 IPM to 25 IPM (again depending on material being cut)

Feeds / Speeds

  • To determine the feed rate (in INCHES PER MINUTE, IPM):
    • 0.0039" (0.10mm) dia - multiply your peak spindle RPM by 0.00012 (dry) or 0.00016 (with ME Lube ) with 5 IPM z-axis plunge rate
    • 0.0051" (0.13mm) dia - multiply your peak spindle RPM by 0.00069 (dry) or 0.00131 (with ME Lube ) with 10 IPM z-axis plunge rate
    • 0.0071" (0.18mm) dia - multiply your peak spindle RPM by 0.00180 (dry) or 0.00233 (with ME Lube ) with 10 IPM z-axis plunge rate
    • 0.0100" (0.25mm) dia - multiply your peak spindle RPM by 0.00254 (dry) or 0.00328 (with ME Lube ) with 20 IPM z-axis plunge rate
    • 0.0150" (0.38mm) dia - multiply your peak spindle RPM by 0.00381 (dry) or 0.00492 (with ME Lube ) with 20 IPM z-axis plunge rate
    • 0.0200" (0.51mm) dia - multiply your peak spindle RPM by 0.00508 (dry) or 0.00656 (with ME Lube ) with 20 IPM z-axis plunge rate
    • 0.0250" (0.63mm) dia - multiply your peak spindle RPM by 0.00634 (dry) or 0.00820 (with ME Lube ) with 20 IPM z-axis plunge rate

    For example. Using a 0.0051" dia bit at 24,000 RPM with ME Lube would allow a feed-rate as high as: (24,000 RPM X 0.00131) =31.4 IPM

Carbide 3-flute tapered stub end mills for engraving and PCB trace isolation and milling
Carbide 3-flute tapered stub end mills for engraving and PCB trace isolation and milling

Engraving / Metal Cutting
Micro-Engraving
(0.005 in. tip)
Tapered-stub
3-Flute Fish-tail
Engraving V-tip
(0.015 in. tip)
Signage V-tip
(0.029 in. tip)
Stub
End-mills

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Updated 10/10/2016 10:40:29 AM