H22 × 108 mm Drill Steel Compatibility: Match Rock Drill Shank, Rod and Taper Bit

Direct answer: H22 × 108 is primarily a rock-drill-side shank/interface designation for tapered drill steel. It does not, by itself, tell you the rod length, the taper angle at the bit end, the bit diameter, or whether a particular rod is approved for every rock drill that uses an H22 chuck. To avoid a wrong order, match the machine-side shank first, then verify rod length, bit-end taper, bit diameter, flushing arrangement, and the exact rock-drill model as separate checks.

This matters because buyers often compress several different compatibility questions into one phrase—“I need H22 × 108 rods.” That is enough to start an RFQ, but not enough to safely release a purchase order. Atlas Copco, for example, currently lists a pneumatic rock drill with an H22 chuck and an available shank size of Hex 22 × 108 mm, while Sandvik separately lists tapered drill bits in 7°, 11°, and 12° taper options. Those are different interfaces in the same drilling system.

1. What Does H22 × 108 Actually Control?

In practical purchasing language, H22 × 108 should be treated as the machine-side shank family you need to match to the rock drill chuck and striking interface. The safest approach is to use the rock-drill manual, an approved supplier drawing, or an existing correctly fitting rod as the controlling reference rather than relying on the label alone.

The distinction is important. Two rods can both be described as H22 × 108 on the machine side and still be unsuitable substitutes if their bit-end taper, length, collar geometry, flushing details, or approved machine application differ.

2. H22 × 108 Does Not Automatically Mean an 11° Taper

This is one of the most common ordering mistakes. The “H22 × 108” description belongs to the rock-drill side of the drill steel. The taper angle belongs to the bit side. They must be checked independently.

Sandvik’s current tapered-bit range lists 7°, 11°, and 12° taper options, demonstrating why a buyer should never assume one taper angle from the H22 × 108 shank description alone. PerfoMax’s current H22 × 108 mm tapered drill rod page specifically covers an 11° bit-connection option. If your installed system uses another taper, do not substitute the 11° configuration simply because the machine-side shank is H22 × 108.

If the taper is unknown, use the existing rod and bit, equipment records, supplier drawing, or controlled measurement. The separate guide on 7° vs 11° vs 12° tapered drill rod and bit compatibility explains how to keep that interface from being confused with the machine-side shank.

3. The Full Compatibility Chain

A tapered top-hammer drilling system should be checked as a chain rather than as a single part number:

1. Rock drill and chuck: identify the exact make, model, and variant.
2. Machine-side drill-steel shank: confirm H22 × 108 or the exact alternative specified by the machine manual.
3. Rod body and length: confirm the required overall/effective length and the operating space available.
4. Bit-end taper: confirm 7°, 11°, 12°, or another controlled connection.
5. Bit diameter and design: match the intended hole size, rock condition, and approved drill envelope.
6. Flushing path: confirm the water or air path and the rod/bit flushing arrangement.

Each step solves a different failure mode. A rod can fit the chuck but reject the bit. A bit can fit the taper but be outside the practical hole range of the rock drill. A mechanically compatible string can still drill poorly if flushing, feed, or operating conditions are wrong.

4. A 7-Step H22 × 108 Replacement Workflow

For a replacement purchase, use the following sequence before asking suppliers to quote.

1. Read the rock-drill nameplate. Record the manufacturer, model, suffix/variant, and any serial or revision information that affects tooling.
2. Check the machine manual or approved tooling list. Look for the specified shank family. If the documentation explicitly states Hex 22 × 108 mm, use that as the primary interface reference.
3. Inspect the current correctly fitting rod. Photograph the shank end, collar/shoulder area, bit end, and any markings. Do not use a badly mushroomed or damaged rod as your only dimensional reference.
4. Confirm the rod length separately. PerfoMax’s current H22 × 108 inquiry options include 600, 800, 1000, 1200, 1600, 1800, 2000, and 2400 mm. The correct choice depends on working space, hole plan, and handling—not on the H22 × 108 designation itself.
5. Confirm the bit-end taper. State the exact angle in the RFQ. If the existing system is unknown, ask for a drawing-based verification instead of guessing.
6. Confirm the bit diameter and drilling application. Supply target hole diameter, drilling direction, rock condition, and typical hole depth.
7. Lock the quotation to a controlled configuration. Require the quote or attached drawing/data sheet to state the shank, taper, length, bit connection, and any critical inspection requirements.

For length selection specifically, see the H22 tapered drill rod length guide.

5. Can H22 × 108 Be Used with YT28?

For PerfoMax’s current catalog, the YT28 air-leg pneumatic rock drill page uses an H22 × 108 shank reference. That makes H22 × 108 a relevant starting point for this product family. However, the final quotation still needs to follow the exact supplier manual and quoted configuration, especially when a buyer is replacing tooling on an existing machine from another source.

The same caution applies to other pneumatic drills. A generic statement such as “this is an H22 machine” is weaker evidence than an exact model/variant plus a manual or controlled drawing. When the machine is old, rebuilt, or sourced through multiple suppliers, a photo and measurement check is particularly valuable.

6. How Bit Diameter Fits into the Decision

Bit diameter is another separate variable. Sandvik’s current tapered-bit range, for example, spans 28–40 mm and offers multiple taper angles. PerfoMax currently lists H22 tapered button bits in 30–40 mm as an inquiry range. Neither range means every diameter is automatically correct for every H22 × 108 rock drill.

The final diameter should remain within the approved machine/tooling envelope and should suit the actual hole, rock, flushing, and operating conditions. If you know only the shank size but not the target hole diameter, the RFQ is incomplete.

7. Common H22 × 108 Procurement Mistakes

• Assuming H22 × 108 defines the whole rod. It does not specify rod length or bit-end taper.
• Assuming H22 × 108 always means 11°. The taper is a separate connection variable.
• Ordering from a photo alone. Similar-looking collars and shanks can hide dimensional differences.
• Ignoring the exact rock-drill variant. Model families can have different tooling configurations.
• Copying the worn rod’s dimensions without checking wear. Mushrooming, deformation, and wear can distort measurements.
• Choosing the longest rod available. Rod length is constrained by workspace, handling, drilling direction, and practical feed/support.
• Using target hole diameter as proof of interface compatibility. Hole diameter does not tell you the shank or taper.

8. H22 × 108 RFQ Checklist

For a fast technical review, send the following information in one RFQ package:

• rock-drill manufacturer, model, and variant/suffix;
• photo of the machine nameplate;
• required machine-side shank: H22 × 108, if confirmed;
• clear photos of the current rod shank, collar, and bit end;
• existing rod markings or part number;
• required rod length and whether the figure is overall or effective length;
• bit-end taper angle;
• bit type and target diameter;
• typical hole diameter and depth;
• drilling direction and application;
• rock condition if known;
• flushing method;
• quantity and spare-parts requirement;
• inspection, packing, marking, and documentation requirements.

If any of the interface details are uncertain, include scale-reference photographs or a controlled drawing rather than asking the supplier to infer them from the phrase “H22 rod.”

FAQ

What does H22 × 108 mean on a drill rod?

It is best treated as a machine-side shank/interface designation for hexagonal drill steel. It is used to match the rod to the rock drill chuck and striking interface. The machine manual or controlled drawing should define the exact geometry.

Does H22 × 108 mean the rod has an 11° taper?

No. The machine-side H22 × 108 shank and the bit-end taper are separate specifications. Current tapered tooling can use different taper angles, so state the angle explicitly.

Will any H22 rod fit any rock drill with an H22 chuck?

Do not assume so. Confirm the complete shank designation, collar/interface geometry, exact drill model/variant, and the machine manufacturer’s tooling specification.

Does changing rod length change H22 × 108 compatibility?

The machine-side interface can remain H22 × 108 across different rod lengths, but length changes the working envelope, handling, support, and practical drilling setup. It must therefore be selected separately.

What should I photograph if I do not know my rod specification?

Photograph the rock-drill nameplate, the complete rod, the machine-side shank and collar, the bit-end taper, any markings, and the current bit. Include a ruler or caliper reference where appropriate and avoid using a severely worn component as the sole reference.

PerfoMax H22 × 108 Tapered Drilling Tools

PerfoMax’s current product scope includes an H22 × 108 mm tapered drill rod with an 11° connection option, 30–40 mm H22 tapered button bits, and pneumatic rock drills such as the YT28. The written quotation and attached drawing/data sheet should control the final supplied configuration.

For replacement tooling or a new drill–rod–bit package, send PerfoMax the machine model, current tooling photos, shank, taper, rod length, bit diameter, and application details for RFQ review.

Technical Sources

• Atlas Copco — BBC 34-DSI pneumatic rock drill
• Sandvik — Tapered Bits
• Sandvik — Top Hammer Drilling Tools