RECOMMENDED CUTTING SPEED (SFM) [For Internal Grooving]

Cutting Speed (SFM)

Work Material Hardness Grade

165 330 490 655 820 985 1310

P VP20RT 260 590

Mild Steel 160HB VP10RT 295 620

NX2525 230 560

VP20RT 195 460

VP10RT230490
160─280HB

MY5015 295 690

Carbon SteelNX2525180440
Alloy SteelVP20RT165360
VP10RT195395
280HB
MY5015260525
NX2525150345
MVP20RT165360
Stainless Steel<270HB
VP10RT195395
KVP20RT195460
Gray Cast IronTensile Strength230490
300MPaVP10RT
MY5015295690
VP20RT165360F
Ductile Cast IronTensile Strength

800MPa VP10RT 195 395

MY5015 260 525

S VP20RT 100 195

Heat Resistant Alloy130 230
Titanium AlloyVP10RT
RT9010130 230
HBC8110195330
Hardened steel50HRC <
MB8025195330
NContent
Aluminum AlloyRT90104901310
Si<5%
Aluminum AlloyContentRT90104901310
5%≤Si≤10%
Aluminum AlloyContentRT9010260525

Si>10% Note 1) VP20RT is the first recommended grade for materials other than hardened steels. Note 2) For RT9010, VP10RT, VP20RT and MY5015, wet cutting is recommended. GROOVING

Note 1) The cutting diameter 100% represents the minimum cutting diameter (DMIN). Note 2) The graph on the left shows the cutting conditions when setting the feed to 100%. 105 : 1st 2.000 recommended area 100 1.500 95 1.250 90 1.000 .750 85 80

0 .002 .004 .006 .008 100 150 200 250

Feed (IPR) Hole diameter (%)