Calculation formula of turning
- 1. Processing time T [sec]Back to calculator
- Types
- Outer diameter
- End face
- Grooving
- Cut off the
- Constant speed Tc
- 60 x L
- f x n
- Tc
- =
- 60 x （D1-D2） x N
- 2 x f x n
- Tc
- =
- 60 x （D1-D2）
- 2 x f x n
- Tc
- =
- 60 x D1
- 2 x f x n
- Tc
- =
- Constant cutting speed T1
- 60 x π x L x Dm
- 1,000 x f x vc
- T1
- =
- 60 x π x（D1+D2） x（D1-D2） x N
- 4，000 x f x vc
- T1
- =
- 60 x π x（D1+D2） x（D1-D2）
- 4，000 x f x vc
- T1
- =
- 60 x π x（D1+D3） x（D1-D3）
- 4，000 x f x vc
- T1
- =
- fFeed rate[mm/rev]
- nSpindle speed[min-1]
- LProcessing length[mm]
- DmProcessing diameter[mm]
- D1Maximum processing diameter[mm]
- D2Min processing diameter[mm]
- D3Maximum speed time diameter[mm]
- nmaxMaximum spindle speed[min-1]
- Constant cutting speed：Maximum speed
- 60 xD3
- 2 x f x nmax
- T2
- =
- T1
- +
- 2. Required power Pc [kW]
- Pc
- =
- vc x f x ap x kc
- 60 x 1,000 x (Ƞ ÷100)
- PcRequired power[kW]
- vcCutting speed[m/min]
- fFeed rate[mm/rev]
- apCut deep[mm]
- KcSpecific cutting resistance[MPa]
- ȠMechanical power[%]（70~85）
- 3. Cutting speed VC [m/min]
- vc
- =
- π x Dm x n
- 1,000
- 4. Spindle speed n [min-1]
- n
- =
- vc x 1,000
- π x Dm
- 5. Feed rate f [mm/rev]
- f
- =
- I x π x Dm
- vc x 1,000
- =
- I
- n
- 6. Theoretical surface roughness h [μm]
- h
- =
- f2 x 1,000
- 8 x RE
- 7. Horsepower required H [HP]
- H
- =
- Pc
- 0.75
- 8. Chip discharge Q [cm3/min]
- Q
- =
- vc x f x ap
- 9. Cutting resistance P [kN]
- P
- =
- Kc x f x ap
- 1,000
Specific cutting resistance Kc Approximate value
- P
- Non-alloy steel1,500 MPa
- Low-alloy steel2,000 MPa
- High alloy steel3,000 MPa
- M
- Austenite system2,000 MPa
- Ferritic system2,500 MPa
- K
- Malleable cast iron900 MPa
- Gray cast iron1,200 MPa
- Nodular cast iron1,500 MPa
- N
- Aluminum alloy500 MPa
- Copper alloy900 MPa
- S
- Ti base1,400 MPa
- Fe base2,500 MPa
- Ni base2,800 MPa
- Co base3,000 MPa
- H
- High hardness steel 50-55HRC 3,300 MPa
- High hardness steel 60-63HRC 4,500 MPa
- High hardness cast iron3,500 MPa
- vc
- Cutting speed[m/min]
- n
- Spindle speed[min-1]
- Dm
- Processing diameter[mm]
- f
- Feed rate[mm/rev]
- I
- Processing length per minute[mm]
- h
- Theoretical surface roughness[μm]
- RE
- Tool nose radius[mm]
- H
- Horsepower required[HP]
- Pc
- Required power[kW]
- Q
- Chip discharge[cm3/min]
- ap
- Cut deep[mm]
- P
- Cutting resistance[kN]
- Kc
- Specific cutting resistance[MPa]
- ※ π ≒ 3.14
- FcPrincipal force
- FfFeed force
- FpBack force
Consulting
