1. Match Bit Size to Hole Diameter

The first rule of how to choose DTH hammer bits:

(1) 90-110mm holes: Use HW412A compatible bits

(2) 110-138mm holes: Require HW-452 special bits

(3) Custom bits for non-standard sizes

This is the foundation of how to choose DTH hammer bits

2. Consider Power Compatibility

When learning how to choose DTH hammer bits, never ignore:

(1) 162kW HW421T needs high-torque bits

(2) 191kW HW-452 handles heavy-duty bits

(3) Low-power rigs require lightweight designs

This how to choose DTH hammer bits tip is often overlooked

3. Adapt to Working Conditions

How to choose DTH hammer bits for different environments:

(1) 25° slopes: Standard bits suffice

(2) 30° steep slopes: Anti-slip tooth bits

(3) Dusty sites: Dry dust-collection bits

This how to choose DTH hammer bits method works best in mines

4. Match Drill Pipe Specifications

Complete how to choose DTH hammer bits solutions include:

(1) φ60mm pipes for 90-127mm bits

(2) φ76mm pipes for 110-138mm bits

(3) Pipe length (2m/3m) affects bit selection

5. Select Wear-Resistant Materials

Advanced how to choose DTH hammer bits knowledge:

(1) Tungsten alloy bits for granite

(2) Surface-hardened bits for sandstone

(3) Composite bits for mixed formations

Hengwang DTH Rig Recommendations

From technical specifications:

1. Budget Option: HW412A

(1) Hole diameter: 90-110mm

(2) Weight: 3.35 tons

(3) Ideal for small projects

2. All-Rounder: HW421T

(1) 30° climbing ability

(2) Dry dust collection standard

(3) Dual-speed travel system

3. Heavy-Duty Choice: HW-452

(1) Max torque 2500N.m

(2) 191kW power

(3) Supports 138mm large holes

Buying Advice:

(1) Determine hole size before selecting rig

(2) Choose HW421T for complex environments

(3) Contact Hengwang for bulk custom orders

Remember: Proper how to choose DTH hammer bits boosts efficiency by 30%!