Description
H25-R25(R32) Tapered Drilling Rods are engineered specifically for light-duty rock drilling applications in mining, quarrying, and tunneling. Manufactured from high-grade ZK22CrNi3Mo alloy steel, these rods offer an exceptional balance of fatigue strength and toughness.
Designed with a standard 7° taper and featuring either R25 or R32 thread connections, these hexagonal rods (25mm/1″) ensure efficient energy transmission from the rock drill to the bit, significantly reducing energy loss and extending the service life of your equipment.
Key Features
Premium Material: Crafted from ZK22CrNi3Mo, a specialized chromium-nickel-molybdenum alloy steel known for its high impact toughness and superior fatigue resistance.
Precision Taper: Features a standard 7° taper angle for a secure and stable connection with tapered drill bits.
Versatile Threading: Available in both R25 and R32 thread options to match various light-duty drilling requirements.
Optimized Energy Transfer: The 25mm (1″) hexagonal shank (H25) provides maximum rigidity and ensures the percussive energy is delivered directly to the rock face.
Anti-Corrosion Coating: Finished with a protective layer (as seen in the signature orange/yellow finish) to prevent rust during storage and transport.
Specifications
| Product Code | Length (L) mm | Length (L) ft/in | Hex Size (H) | Thread | Taper | Weight (kg) |
|---|---|---|---|---|---|---|
| 246-2510-5207 | 1000 | 3′ 3 3/8″ | 25mm (1″) | R25 | 7° | 3.7 |
| 246-2522-5407 | 2200 | 7′ 2 5/8″ | 25mm (1″) | R32 | 7° | 8.7 |
| 246-2526-5407 | 2600 | 8′ 6 3/8″ | 25mm (1″) | R25 | 7° | 10.1 |
| 246-2528-5407 | 2800 | 9′ 2 1/4″ | 25mm (1″) | R25 | 7° | 10.9 |
Applications
The H25-R25(R32) drilling rod is the ideal choice for:
Small Hole Drilling: Perfect for handheld rock drills in granite and marble quarries.
Mining: Used in underground mining for drifting and bolting.
Construction: Ideal for road construction, foundation reinforcement, and demolition projects.
Trenching: Efficient for light-duty rock excavation in utility installations.
Maintenance & Care
To maximize the lifespan of your ZK22CrNi3Mo drilling rods, follow these maintenance tips:
Lubrication: Always apply high-quality thread grease to the R25/R32 threads before assembly.
Avoid Overheating: Ensure proper flushing (water or air) to keep the rod cool and clear debris.
Straightness Check: Regularly inspect the rod for bending; a bent rod will lead to premature failure and bit damage.
Proper Storage: Store rods in a dry environment to prevent surface pitting and stress corrosion.
How to Choose the Right Taper Rod?
Selecting the correct rod depends on three factors:
Drilling Depth: Match the rod length ($L$) to your required hole depth. For deeper holes, ensure the rod weight is manageable for your handheld drill.
Bit Compatibility: Verify if your drill bits require an R25 or R32 thread connection.
Rock Hardness: The ZK22CrNi3Mo material is excellent for medium-to-hard rock. If you are drilling in extremely abrasive conditions, ensure your flushing pressure is optimized.