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PreciseBIT 4-Flute Ball-nose Stub End-mills (MN408) - (0.125" shank )

4-flute stub


  • Geometry - 4-flute stub, 1/8 in. (3.18 mm) shank, end-cutting ball-nose
  • Length - 1.50 in. 0.010 in.
  • Diameter tolerances:
    • 0.1250 in.: +0.0000 in.,  -0.0020 in.
    • 0.0625 in to 0.1200 in.: ±0.0010 in.
    • 0.0010 in to 0.0624 in.: ±0.0005 in.
  • Shank dia. - 0.1248 in. (3.18 mm) +0.0000, -0.0002 in.
  • Max runout (TIR) - < 0.0005 in.
  • Max. depth of cut - DOC varies by diameter 0.005 in. typically 1.5X dia.
  • Anticipated Life - material and cutting environment dependent
  • Material - solid submicrograin carbide
  • Ring Set - 0.800 in. 0.002 in. (optional)
  • Operating RPM - CNC certified operation 2k RPM to 100k RPM



  • End-cutting ball-nose support high plunge rates and full profile cutting
  • Positive cutting geoometry at center eliminates bottom artifacts in 3D profiling
  • High flute volume supports high feed rates / chip loads
  • Cutting edge geometry virtually eliminates chatter at high feed rates
  • Flute geometry enhances rigidity for more accurate, single pass cutting at high chip loads


  • Machining mild steel, tool steel and stainless steel (with cutting fluid)
  • Machining non-ferrous and precious metals for jewelry fabrication
  • Machining steel counter-plates for steel-rule dies(with cutting fluid)
  • Cutting and shaping cast iron (with cutting fluid)


4-flute stub mill tip

Metal Cutting - Stub Length End-mills
2-Flute Fish-tail
Copper Rubout
2-Flute Fish-tail
3-Flute Fish-tail
4-Flute Fish-tail
2-Flute Ball-nose
4-Flute Ball-nose

If your purchase is over US$50,
you save $5 in shipping!
    Sales Items    
Item # Description Unit Price Depth Ring Enter Qty.
MN408-1250-019B  1/8 in. (0.1250 in., 3.175 mm) PreciseBIT 4-flute ball-nose stub end-mill, 0.191 in. max DOC, 1.50 in. OAL   $24.95    Sale Price: $18.15   
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Updated 10/10/2016 11:33:23 AM