Points at bolt countersinking 1. Carbon steel Increase the feed rate to fz=0.1 ~ 0.15 (mm/t) for preventing long chips at low feed rates. Chip control is good when setting (Vc=80m/min) for MEF11~MEF25, and (Vc=120m/min) for MEF26~MEF48.

Toolholder descriptionVc(m/min)fz(mm/t)
MEF11~MEF25800.1~0.15
MEF26~MEF481200.1~0.15
2. Sticky materials
Other applicationsOther applicationsStep feed is recommended for good chip controlT-Slot millT-Slot mill
Increase the feed rate to fz=0.1 ~ 0.15 (mm/t) for preventing long chips at low feed rate (fz=0.05mm/t).
Use cover to prevent accidents or injury by thick chips at higher feed rates.
Toolholder descriptionVc(m/min)Step feed (mm) fz(mm/t)
MEF11~MEF4880~1500.5~1.5 0.1~0.15
METS3. Stainless steel
Use a lower cutting speed. high cutting speeds cause chattering.
Cutting performance when shoulderingDescriptionCutting range
MEF bolt countersink end mill is also recommended of shouldering.
MEF11-S12~

ae Vc=80~120m/min MEF14-S12

DCMEF17-S16DC
S55C-0.3-0.1-0-0.1

CW -0.1-0.3 .3 CW-0.1-0.3

DryLU 0-0.2MEF18-S16LU 0-0.2
LFLF
Fig. 1Fig. 2
Overhang length:DCX/6DCX/3DCX/2Cutting width: ae(mm)

Same as LH in the dimension table MEF20-S16 Toolholder dimensions MEF22-S20

  • When shouldering, both side edge and bottom edges function.
  • Both edges wear at the same time depending on ap. The insert uses MEF25-S20
Availa-Dimension (mm)eSpareparts
bilityt holScrewWrench(Torx)
DescriptionRInsertsFlutesA.R.R.R.DCDCONLFLUCWDNCoolan Fig.Applicable inserts
METS21-S25N21212510929910.51SB-2560TRDT-8SDMT060304E-K
25-S25N-1025112321112.51
32-S32N42+932120381415.5No 1SB-3060TRDT-10SDMT080308E-K
40-S32N124032130501820.51SB4085TRDT15SDMT120408EK
50-S32N-50140602226.51---
METS21-S25-HN2121210929910.52SB260TRDT8SDMT060304EK
25-S25-HN-10255112321112.52-5--
32-S32-HN42+932120381415.5Yes 2SB-3060TRDT-10SDMT080308E-K
40-S32-HN124032130501820.52SB4085TRDT15SDMT120408EK
50-S32-HN-50140602226.52---

M DCX/6 DCX/3 DCX/2 Cutting width: ae(mm)

METS...-H has air holes JIS standard of T-slot (Extracted from B0952) (Unit: mm)

A (Nominal size)BCH Max.Min.A
1219 +2 08 +1 02520H
14 1823 +2 0 30 +2 09 +2 0 12 +2 028 3623 30BC
2237 +3 016 +2 04538
2846 +4 020 +2 05648Previous milling groove does not affect.