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  • Monitor your spindle load when running a high feed rate 
  • Running your spindle load too high may result in a damaged spindle
  • Always start with your feed at 50% or below
  • Gradually bring the feed rate up while monitoring chatter and spindle load
  • Always feed in and feed out when reaming
  • Always use the correct drill size when drilling the hole before you ream it. 
  • Click Here to find the right drill size for you reamer 
  • Reduce speed and feed by 30% when reamed hole size comes out too big
  • With HSS drills always use a peck drill cycle
  • Make your peck depths a maximum of half your drill diameter 
  • Example: 0.250 in drill diameter pecking at 0.125 depths
  • For extra long drills reduce speeds and feeds by 30%-50%

304 Stainless Steel

Coated Carbide Endmills 

Endmill Diameter (inches)

Surface Speed (SFM)

Feed Per Tooth (IPT)

1/8"
1/4"
1/2"
5/8"
3/4"
1"
180-225 SFM
180-225 SFM
180-225 SFM
180-225 SFM
180-225 SFM
180-225 SFM
0.0002
0.0006
0.0012
0.0015
0.0018
0.0024

304 Stainless Steels

High Speed Steel Drills (HSS)

Tool Diameter (inches)
Surface Speed (SFM)
Cutting Feed (IPR)
0-1/8"
1/8-1/4"
1/4-1/2"
1/2-3/4"
3/4-1"
45 SFM
45 SFM
45 SFM
45 SFM
45 SFM
0.001-0.002
0.002-0.003
0.003-0.006
0.006-0.007
0.007-0.008
  • With Carbide drills always look up wether to peck or not
  • Make your peck depths a maximum of half your drill diameter 
  • Example: 0.250 in drill diameter pecking at 0.125 depths
  • For extra long drills reduce speeds and feeds by 30%-50%
Tool Diameter (inches)
Surface Speed (sfm)
0-1/8
1/8-1/4"
1/4-1/2"
1/2-3/4"
3/4-1"
Cutting feed (IPR)
180-195 SFM
180-195 SFM
180-195 SFM
180-195 SFM
180-195 SFM
Tool Diameter (inches)
Surface Speed (sfm)
0-1/8
1/8-1/4"
1/4-1/2"
1/2-3/4"
3/4-1"
40-90 SFM
40-90 SFM
40-90 SFM
40-90 SFM
40-90 SFM
.004-.008
Cutting Feed (IPR)
.001-.003
.003-.006
.006-.009
.007-.010
0.001-0.003
0.003-0.005
0.005-0.007
0.007-0.009
0.009-0.011