The H22 Tapered Drill Rod (Hex 22mm) is the most widely used drill steel in the world. Topking H22 rods are manufactured from premium hollow alloy steel and undergo a rigorous Carburization process. This ensures the rod has a hard surface to resist wear and a tough core to absorb the high impact energy from rock drills.
Featuring a standard Hex 22mm x 108mm shank, this rod is the perfect partner for handheld pneumatic rock drills such as YT24, YT27, YT28, and Y19A. It is the go-to solution for granite quarrying, small-scale mining, and tunneling projects.
| Comparison Item | H22 (Universal) | H25 (Heavy Duty) |
|---|---|---|
| Application | General Tunneling/Quarry | Deep Holes / Large Diameter |
| Rigidity | Standard | High (Anti-bending) |
| Energy Loss | Standard | Minimal (Better Transfer) |
Step 1: Use H22 Rods + Tapered Bits to drill holes fast.
Step 2: Use Topking Expansive Mortar (HSCA) to split the stone blocks silently and safely.
Product Name: H22 Tapered Drill Rod (Hollow Steel)
Shank Size: Hex 22mm * 108mm (Standard)
Taper Degree: 7°, 11°, 12°
Steel Grade: 95CrMo / Z708 (Premium Drill Steel)
Available Lengths: 0.6m to 4.8m (Customizable up to 8m)
Heat Treatment: Full-length Carburization for high fatigue resistance.
DRILL ROD SPECIFICATIONS & STRUCTURE
Q: What is the difference between H22 and H25 tapered drill rods?
A: H22 (Hex 22mm) is the standard lightweight choice for tunneling and handheld drills. H25 (Hex 25mm) is a heavy-duty version with higher rigidity, designed to prevent bending in deep holes and better transfer energy from heavy YT29A drills.
Q: How to choose between a 7-degree and 12-degree taper for H22 rods?
A: 7-degree is standard for light drills like Y24. 12-degree tapers provide a more secure connection for high-impact air-leg drills (YT28), preventing the bit from detaching under massive stress.
Q: How to effectively prevent rod breakage during tunneling?
A: Always use an oiler (FY250) to lubricate the drill. Avoid 'dry hammering' against rock without sufficient thrust. Topking rods use carburized heat treatment to specifically combat the fatigue stress that causes breakage.
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