Sargın Constructıon is Turkish company with Raise Boring specialty.

Full-Scale linear cutting tests using a button cutter and deterministic performance prediction modeling for raise boring machines

Aydın Shaterpour-Mamaghani a, Hanifi Çopur a, Arif Gümüş a, Deniz Tumaç a, Cemal Balcı a,
Tayfun Erdoğan b, Engin Doğan c, Ayhan Koçbay d

a    Mining Engineering Department, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
b    Sargin Construction and Machinery Industry Trade Inc., Ankara, Turkey
c    Mining Engineer, Istanbul, Turkey
d    General Directorate of State Hydraulic Works, Ankara, Turkey

https://www.sciencedirect.com/science/article/abs/pii/S0886779822002498#!