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Optimized for Swiss-Type Automatic Lathes Dia. ⌀ 8 .315 ~ 20 .787 mm

Designed for high-precision machining in compact, small-diameter applications.
Delivers stable performance and superior surface finish through indexable efficiency and compact design.
Features
  • Achieves excellent surface finish down to Rz 1 μm with wiper inserts
  • Tool indexing is simple—no re-adjustment required
  • Supports small corner radius down to 0.05 (.002“) for precision machining
  • Compatible with 20 mm(.787″) / ER16 collet system
  • Enables both D-cutting and ramping with center-cutting inserts
Tooling application
  • Swiss-type automatic lathes
  • Small-diameter precision components
  • Finishing and semi-finishing operations
  • High surface quality requirements

REZ Series

REZ-1R / 1 Insert type

Diameter(DC): ⌀ 8 .315 / ⌀ 10 .394
Lead angle(KAPR): 90 degrees
Insert: CZH04/05 type

REZ-2R / 2 Insert type

Diameter(DC): ⌀ 10 .394 / ⌀ 12 .472 / ⌀ 14 .551
Lead angle(KAPR): 90 degrees
Insert: CZH04 type

REZ-2R D-CUT 45 degree / 2 Insert type

Diameter(DC): ⌀ 10 .394
Lead angle: 90 degrees
Insert: CZH04 / CZH04..-C45 type

REZ-3R / 3 Insert type

Diameter(DC):  ⌀ 15 .590 / ⌀ 20 .787
Lead angle(KAPR): 90 degrees
Insert: CZH04 type

- - - Scroll the table - - -
ISOWork materialvc (m/min) (SFM) Axial feed (mm/rev) (IPR) Trvarse feed (mm/rev) (IPR) ap
(mm)
(inch)
Width of Cut
(mm) (inch)
Steel 80 ~ 120 260 ~ 400 ~0.03 ~.001 ~0.05 ~.002 3.0 .118 ~50% of cutter diameter
Stainless Steel 40 ~ 60 130 ~ 200 ~0.02 ~.0008 ~0.04 ~.0015 2.0 .079 ~50% of cutter diameter
Valve parts
Material :
SUS304L
Holder :
REZ200M3R320 ( ⌀10 ⌀.394″ shank)
Insert :
DM4 CZH0402CFR-BL
Cutting specification :
⌀20 ⌀.787″ ×3 teeth (REZ)
⌀10 ⌀.394″ ×2 teeth (Competitor’s carbide end mill)
Work Diameter :
⌀30.5 ⌀1.201″
Spindle speed :
1,500 rpm
Flat width:
Around 15 mm .5906 inch (REZ) 10 mm .394 inch ×2 pass (Competitor’s carbide end mill)
Feed speed (V f):
150 mm/min 5.9055 IPM (REZ) 100 mm/min 3.937 IPM (Competitor’s carbide end mill)
Feed per tooth (f z) :
0.03 mm/rev .0012 IPR
DOC (ap) :
Max 1.75 mm .070 inch

Using a ⌀10 ⌀.394″ two-flute end mill required two passes, causing step marks and longer machining time.
The NTK ⌀20 ⌀.787″ end mill enables one-pass machining, eliminates steps, and improves efficiency by ~3×.

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