About Us

Large-Size DTH Specialists Since 1999

Topdrill is a South Korean manufacturer of large-size DTH hammers and bits, with manufacturing capability up to 40 inches — one of the widest large-diameter ranges in the industry.

Since 1999, we have focused on one thing: drilling tools for large holes in hard rock. That focus has taken our hammers into foundation piling, construction, and deep well projects across more than 100 countries.

Our Services

Specialized Manufacturing

Large hammers are not scaled-up small ones. Air volume, tolerances, and heat treatment behave differently at size — our production is built around this.

`25+ Years of Field Experience`

Every hammer design carries lessons from nearly three decades of real drilling conditions — hard rock, deep holes, and demanding schedules.

Global Track Record

Trusted by contractors in over 100 countries, from Middle East infrastructure to Asia-Pacific piling and mining projects.

40

Inches — Max Hammer Size

100+

Countries Served

1999

Founded in Korea

25+

Years of Manufacturing

Our Manufacturing

Built In-House, Start to Finish

CNC Machining

Precision turning of large hammer cylinders and pistons

MCT Machining

Multi-axis machining centers for complex components

Precision Grinding

Fine surface finishing for tight internal tolerances

Performance Testing

Every hammer air-tested before shipment

Quality Commitment

Every Hammer Leaves Tested

A large hammer failure in the field costs far more than the tool itself. That is why every Topdrill hammer is machined, ground, and performance-tested in-house before it ships.

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