TinyTurn – Small Optical Part – SH730


After about 350 pcs of machining, the competitor’s cutting edge wears out. Because of the decrease in the hole diameter, 0.2~0.3mm of hole diameter adjustment is needed. However, TinyMiniTurn maintains an accurate hole diameter until 500 pcs of machining without any adjustment due to a special coating that excels in wear resistance.

Industry Engineering
Component Small Optical Part
Material ISO code P - SteelP - Steel
Work material C70U
Machine(spindle type) CNC Lathe
Tool family Turning
Tool category Internal turning
Product name TinyMini-Turn
TSR No. 128T
Small Optical Part


Tungaloy Competitor
Holder JBBS16-4-7
Insert JBTR04090005-D020 Solid bar
Grade SH730 PVD

Tool life

Tungaloy Competitor
Tool life (pcs/edge) 500 330

Cutting conditions

Tungaloy Competitor
Cutting speed V/c (mm/min) 120 120
Feed f (mm/rev) 0.06 0.06
Depth of cut ap (mm) 0.3 0.3
Coolant Water soluble Water soluble


Tool life1.5 times