Общий каталог Yamawa 2021 - страница 405

UH-CT

MS Material Specifi c Series

SP Carbide Taps for Ultra Hard Materials (<63HRC), Coated

HF 5P

SL

COATING

CARBIDE THCHT

SYNCHRO

PO Recommended Tapping Speeds Depending On Materials ISO Vc (m/min)

ST H 1st choice I suitable

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

ROLL

DIN-UH-CT

Process Data

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. 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