Page 853 - Ceratizit Catalog

TC - threading
C248
Corrective actions for thread turning problems

Type of problem

Type of wear Work piece problems Chip control

Flank wear Edge chipping Plastic deformation Built-up edge Burr formation at external thread Ø Profile precision Surface quality Chatter marks, vibration Chip cross section too large Chip cross section too small Chip shape (tangled swarf) Corrective measures

⇪ ⇪ ⇧ Cutting speed
⇪
⇪
Cutting values
a) via the flanks
a,b a,b a,b a,b a,b a,b a,b a,b Feed motion
b) alternating via the flanks

⇧ ⇪ ⇪ ⇧ ⇧ ⇧ ⇧ ⇪ ⇪ ≈ Approach (depth of cut)

⇪ ⇧ ≈ ≈ ⇧ ≈ ⇪ ⇪ ⇧ Number of passes
⇧

▢ ▢ ▢ Finish cut (idle cut)

▢ ▢ ▢ ▢ Chip groove Selection of inserts

⇪ ⇪ ⇪ Cutting material wear resistance
toughness
▢ ▢ ▢ Full profile

Partial profile

≈ ≈ ≈ Stability tool - insert

≈ ≈ ≈ Stability - work piece General criteria

Overhang
⇧
⇧
⇧
≈ ≈ ≈ ≈ ≈ ≈ Tip height

▢ ▢ ▢ ▢ ▢ ▢ Cooling lubricant Parting and grooving / Technical information

raise, increase, avoid, reduce check,
⇪ large influence ⇪ large influence ≈ optimise
raise, increase avoid, reduce
⇧ ⇧ ▢ use
low influence low influence