Page 408 - Yamawa_European_Catalogue_YEU21

Carbide Taps

UH-CT
Intro

MS Material Specifi c Series
SP Carbide Taps for Ultra Hard Materials (<63HRC), Coated

FEATURES
Carbide taps for high hardness steel (55 ÷ 63HRC).
SL HF COATING 5P Specifi c design, ultra fi ne micrograin, suitable coating for
CARBIDE SYNCHRO THCHT long and stable tool life.
5P chamfer length.

Recommended Tapping Speeds Depending On Materials
PO
ISO Vc (m/min)
H1 ≤5 H
H2 ≤5 H
ST H 1st choice I suitable

ROLL

DIN-UH-CT
Process Data
CARBIDE Work-material tool steel, heat-treated (60HRC)
60 holes
DIN Hardness 50HRC UH-CT 60 holes
Size M8x1.25
Tapping length 16mm, through hole
LONG
Machine CNC rigid tapping machine Competitor 8 holes
Tapping speed 1.5m/min (60rpm)
Lubricant non-soluble oil
HAND Number of tapped holes
TAPS
The graph above shows comparison data in tapping heat-treated tool steel by conventional carbide tap and UH-CT. Chipping occurred after 8th
threads with conventional carbide tap. UH-CT can work effi ciently even after 60 threads.
EG (STI)
The graph on the right shows the relation between the number
of tapped holes and the load meter data of the machine on the
tapping test up to 60 holes with UH-CT tap.
SPECIAL
THREADS, Percentage of load meter fi gure tends to increase after tapping
GAUGES 50 holes. This is due to the damage on the tool’s cutting edge. Load meter (%)
Then, tap breakage will happen if the load meter fi gure increases
more and more. Thus for safety purposes, it is better to limit the
number of tapping holes (tool life) when tapping high hardness
THREAD steel materials.
MILLS

Number of holes
DIES

CENTER
DRILLS

Technical
info

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