Associated Company


Siam Tone was established in January of 1989 as a foreign base of operations for TONE Boring Co., Ltd. and as a joint venture company through the merger of TONE Boring Co., Ltd., Mitsui & Co., Ltd. and Siam Industrial Corp. The company is active in the fields of large-scale constructions, bridge foundation constructions, well drilling and related constructions and geological survey works. Construction of a factory in 1991 allowed for the manufacture and sales of truck-mounted well-drilling rigs, coring machines, pumps/special bore piling machines, as well as various machinery and equipment such as screw conveyors and similar used in foundation construction, water well drilling and geological survey. In addition to this base of operations in Bangkok THAILAND, our highly qualified engineers and advanced technology together with our ample variety of machinery have enabled us to provide excellent construction works that are internationally competitive. The proven results of our construction projects have garnered lavish praise and allow us to further expand our role in numerous countries around the world.


Head office




Drilling rig

SIAM TONE CO.,LTD.[Company outline]

Office 5/15 MOO 6 (K.M.15) BANGNA-TRAD ROAD,BANGCHA-LONG BANGPLEE SAMUTPRAKARN 10540 BANGKOK THAILAND TEL.(+66)2-312-5281-300(20 LINES) FAX.(+66)2-312-5304 / 2-750-8597
Capital 42.33 million baht
establishment 1989
Employees 325
Factory 700/47 Amata Nakorn Industrial Estate Park 2, Chonburi 20000, Thailand TEL:(+66)38-213-073-7 FAX:(+66)38-213-078
Main Business Groundwater Development Works / Foundation Works / Geo-technical Works / Manufacturing of related equipments and materials