The STR40 hammer adopts rock drilling theory to design the internal structure size of the hammer, so that the hammer can obtain ideal energy transmission, 

with large single impact energy, high impact frequency and lower air consumption; Selection of high-quality raw materials and advanced processing technology, 

more stable performance, longer life. The domestic advanced heat treatment process is adopted to ensure the good mechanical properties of the hammer.

STAROCKDRILL’S’ DTH hammers are all simple structure, easy to assemble and disassemble, as well as reliable quality and long service life. 

STAROCKDRILL has various hammer models suitable to drill holes from 64mm to 1000 mm (2-1/2” ~ 39-3/8”) in diameter; and come with three kind: 

low pressure (5 ~ 7 bars), middle pressure (7 ~ 15 bar) and high pressure ­­(7~ 30 bars).

STAROCKDRILL’S  DTH hammers mainly be produced with shank type of DHD, QL, NUMA, COP, Mission, SD, BR, CIR,TD.40 MACH44 and STR series, 

Diameter ranging from 2” to 8” for mining and quarrying, and 6” to 32” for water-well drilling, oil-well drilling and foundation and so on.

How to order?

Hammer shank + Inches

(If you are not knowing the sizes, we can give you suggestions on hammers and bits)