
Sumitomo Electric has developed „TME“ external threading inserts with pitch ranges of 1,0 ~ 3,0 mm or 10 ~ 24 threads/ inch and „TMI“ internal threading inserts with a pitch range of 1,0 ~ 3,0 mm. The superior features of the new sintered threading inserts include an M-class tolerance and dimple shaped chip breaker. The M-class tolerance reduces insert cost by eliminating the need for expensive grinding. Furthermore, chip control is greatly improved as a result of the specially designed dimple chip breakers.
Pitch (mm) 1,0 1,25 1,5 1,75
with flat wiper edge 2,0 2,5 3,0 LTER
ISO-Metric 60° TME ( 20, 25 mm) (Lever lock system) For
Pitch (mm)
thread 1,0 ~ 2,0 , 1,5 ~ 3,0 STER
without flat wiper edge TWE ( 12, 16 mm) (Screw on system) Whitworth 55°
Number of threads / inch without flat wiper edge 14 ~ 10 , 24 ~ 16
Pitch (mm) For 1,0 1,25 1,5 1,75
| with flat wiper edge | 2,0 2,5 3,0 | STIR | ||
| internal | ISO-Metric 60° |
thread TMI ( Ø 16, Ø 20 mm )
(Screw on system) Pitch (mm) without flat wiper edge 1,0 ~ 2,0 , 1,5 ~ 3,0