2. Technology
  3. Cutting conditions


Cutting conditions

Cutting condition

First, please enter the specs which you are using, the number of rotations, etc. and calculate the speed of cutting. After that, please compare it with the standards which MRT recommends(please refer to the following chart)

※The speed which MRT recommends is just a standard. It varies from the type of work materials and the performance of the machines. If you would like further informationt in detail, please contact our technical staff.

Please confirm the work material or cutting materials, and try to compare to the table below.

◆Cutting speed V(m/mim)
Work Material Cutting materials
Common material High speed steel Carbide
Iron steel Carbon steel Super soft steel S10C 30~60 60~130
Soft steel S30C 40~60 80~130
Semi-hard steel S40C 35~55 70~110
Hard steel S50C 30~50 60~100
Hardest steel SK5 25~40 50~80
Free cutting steel Lead  Free cutting steel Additional code “L” 45~70 100~150
Sulfur  Free cutting steel Additional code “S” or “SUM” 50~80 110~170
Stainless steel Ferritic Stainless SUS430 30~65 60~130
Martensitic Stainless SUS420J2 20~55 50~120
Austenitic Stainless SUS304 15~50 40~110
Special steel High manganese steel SCMnH21 5~15 15~30
High speed steel SKH51 15~30 35~60
Tool steel SK2 20~30 60~90
Alloy steel SCM430 35~50 70~110
Cast materials Chilled cast iron 5~15
Alloy cast iron 5~15 15~35
Spheroidal graphite cast iron FCD50 15~35 35~60
Standard cast iron FC20 20~50 45~100
Malleable cast iron FCMB32 20~30 40~70
Cast steel SC46 25~40 50~80
Non-ferrous metals Copper alloy Copper C1100 40~100 80~250
Bronze BC2 70~100 150~250
Brass C2600 100~250 200~350
Light alloy Silicon aluminum alloy AC3 25~40 50~80
Aluminum alloy A2017 120~200 250~400
Aluminum A1100S 150~400 300~500
Magnesium alloy MP1 200~600 400~1200
Titanium TR35 10~30 20~60
Cobalt and Nickel alloy Stellite 7~15
Hastelloy X 10~20
Inconel X 15~30
Nickel NNCP-0 10~25
Non-metals Thermosetting plastic 80~130 180~250
Thermoplastic 150~220 300~450
◆Feed per tooth Sz(mm/tooth)
High speed steel screw slotting cutter 0.01mm~0.04mm
Solid carbide metal slitting saw 0.005mm~0.02mm


Vf:Feed speed(mm/min)
Z:Number of teeth
N:Cutting rotation per minute(r.p.m.)

Troubleshooting for cutting use

◆Deciding the cutting speed​
Maintain low speed when....
  • durability of the cutter is required
  • the work material is hard, or it is coated with surfaces resistant to wear
  • the processing is in a primary stage (coarse cutting)
  • the process is new or still unfamiliar for you
  • the wear and the damage of cutting edge are rapid
Maintain high speed when....
  • the work material is relatively easy to be cut
  • finishing process which requires high precision and accuracy
◆Choosing the feed per tooth
Decrease the feed when....
  • the work material can only be set up in an unstable position, or you are handling a thin and irregularly-shaped material
  • the work material must be cut by a thin, fragile cutter
  • the machined surface must be high level accuracy of roughness
  • chipping occurs more than minimum feed condition
  • you are slotting a deep groove
Increase the feed when....
  • the work material set up firmly, heavy duty cutting
  • the work material is relatively easy to be cut, or it is hard only on the surface, and the inside is relatively soft
  • the work material surface has intermittence shape
  • relief angle of the cutter wears rapidly
  • the machinery vibration occurs at cutting process

If you must change the machine set up from the testing stage, please experiment with the cutting speed, feed, depth, independently to find out what causes right / wrong results.

Even if the combination is proven right during the testing stage, it is advisable to gradually increase the limit to reach the highest efficiency possible. Then, adjust the limit to meet the safety guidelines for the best result.

Please reinforce with fix ture equipment if necessary.