Independent attachment selection guide
Drill Masts
Excavator-mounted drill masts add a feed beam, drilling head and control system to the excavator boom, allowing the carrier to position a drill accurately on slopes, benches and confined sites where a dedicated drill rig may be less practical.
Quick answer: Best suited to short-run or access-limited drilling where excavator reach and mobility are valuable and a feed mast is needed to control drill alignment. The main reason to choose another attachment is when high-volume production drilling that exceeds the hydraulic, dust-control or rod-handling capability of an attachment-based setup.
What are drill masts?
In practical terms, drill masts are selected when the job calls for short-run or access-limited drilling where excavator reach and mobility are valuable and a feed mast is needed to control drill alignment. They are not simply another name for a neighboring attachment family: the working geometry and duty are different.
You may also see this attachment described as excavator mounted drill mast, drilling attachment, arm mounted drilling module. Terminology varies by region and manufacturer, so compare the working principle, mounting geometry and rated limits rather than the product name alone.
This drill masts guide is manufacturer-neutral. Use it to build a shortlist and a technical question list, then confirm the exact fit and safe operating limits from the carrier and attachment documentation.
At a glance
| Best for | Short-run or access-limited drilling where excavator reach and mobility are valuable and a feed mast is needed to control drill alignment. |
|---|---|
| Less suitable for | High-volume production drilling that exceeds the hydraulic, dust-control or rod-handling capability of an attachment-based setup. |
| Typical carrier groups | Excavators |
| Related applications | Drilling Trenching Foundations |
| Directory categories | Drilling Trenching |
Common types and configurations
Rotary drill mast
Uses a rotary head for soil, anchors or other applications where percussion is not required.
Top-hammer rock drill mast
Adds a percussive drifter for hard rock drilling and often needs dust or flushing systems.
Anchor drilling mast
Configured for self-drilling anchors, casing or grout systems with clamps and feed control suited to geotechnical work.
How to choose the right setup
- Hole diameter and depth
- Feed length, drill head, rod system and mast pullback must suit the required hole.
- Drilling method
- Rotary, top-hammer, down-the-hole or anchor systems have different air, flushing and tooling needs.
- Mast positioning
- Rotation, tilt, side shift and feed foot help establish the hole angle while the excavator remains stable.
- Hydraulic demand
- Drill rotation, percussion, feed and clamps can require multiple functions and substantial cooling capacity.
- Dust and spoil control
- Rock drilling may need dust collection, water mist or air flushing appropriate to the site and method.
For drill masts, carrier weight is only a first filter. Pay particular attention to hole diameter and depth, drilling method and the complete attachment mass. Mounting height, center of gravity, working radius and the material being handled can change the load on the carrier substantially.
Carrier, mounting and hydraulic compatibility
Typical carrier groups for drill masts include excavators. Start with the exact machine make and model, then verify the approved coupler or pin geometry, attachment mass and working envelope. If a quick coupler, tilt unit, rotator or adapter is added, include it in the total geometry and weight calculation.
For powered drill masts, compare the required auxiliary flow and pressure with the carrier’s continuous capability, not just the maximum headline figure. Confirm return-line, case-drain and electrical-control requirements where applicable. A physical connection is not proof that the complete hydraulic and structural configuration is approved.
Practical operating approach
- Level and stabilize the carrier before setting the drill angle.
- Seat the mast foot or support where the design requires it, then start with controlled feed to establish the hole.
- Manage rods, spoil and flushing so the work zone stays clear of rotating and suspended components.
With drill masts, machine position is part of the attachment setup. Work from a stable stance, keep the highest loads as close to the carrier as the task allows, and avoid unnecessary side loading. This improves visibility and reduces leverage through the coupler, boom and attachment frame.
Limits and safety checks
- An excavator drill mast does not automatically provide the guarding and automation of a dedicated production drill rig.
- Drilling close to utilities requires accurate service location and project controls.
- Carrier hydraulic oil temperature can limit continuous drilling if the system is undersized.
The limits for drill masts are model-specific and apply only to the conditions stated by the manufacturer. Combine the attachment instructions with the carrier manual and local site rules, and use an exclusion zone whenever the work can create falling, swinging, rolling, rotating or ejected material.
Maintenance and wear points
- Inspect feed chains or cylinders, slides, clamps, mast structure and drill head mounts.
- Maintain drifter lubrication, flushing and wear components for the chosen drilling system.
- Check hose bundles where the mast rotates or shifts relative to the boom.
A short pre-shift check is particularly useful on drill masts because the working components are exposed directly to the material and environment. Record abnormal play, cracks, heat, leaks, bent components or unusual noise early rather than treating them as normal wear.
Compare related attachments
- Hydraulic Rock Drills — focus on hard-rock drilling; many complete systems are mounted on a drill mast.
- Augers — are simpler for many soil-boring tasks where a rigid feed mast is unnecessary.
- Pile Hammers — install piles by impact rather than drilling a borehole.
If drill masts are only one option for the job, use the attachment directory to compare adjacent tool families. You can also start from the machine-type guides or the application guides when the carrier or job is already fixed.
Before requesting a quote
- Write down the carrier make, model, operating weight and coupler or pin dimensions.
- Record auxiliary flow, pressure, return and electrical connections available on the machine.
- Describe the material, expected duty cycle, working environment and the most demanding part of the job.
- Ask for attachment weight, dimensions, rated limits, hydraulic requirements, wear-part list and service intervals.
- Confirm how the attachment changes machine stability, visibility, transport width and working envelope.
Common questions
Why use a drill mast instead of an auger on the excavator arm?
The mast controls feed and alignment over a defined stroke, which is useful for rock drilling, anchors and other holes where axis control matters.
Can one drill mast handle soil and rock?
Some systems accept different heads and tooling, but the complete rotary, percussion, flushing and feed system must suit each method.
Does an excavator drill mast need compressed air?
It depends on the drilling method. Some rock and down-the-hole systems require air, while other rotary or hydraulic methods may use water or different flushing arrangements.
How this guide should be used
This page places drill masts inside the MachineAttachments.com tool, carrier and application directory. It is an independent selection overview rather than a compatibility approval, product review or substitute for a manufacturer manual. Because model-specific dimensions, interfaces and ratings can change, verify the current technical documentation before ordering or operating equipment.
Last reviewed: 6 October 2026.