Vertical drilling rig for the WPK-4 excavator

WPK-4 mini excavator drilling rig – Reliable equipment from the Polish manufacturer Staltechnika

Mini excavator drilling rig WPK-4 is a professional hydraulic attachment manufactured in Poland by Staltechnika. It is mounted on the machine’s arm and is used for precise drilling in the ground. As an irreplaceable tool in daily work, our hydraulic mini excavator drilling rig has been designed with maximum efficiency, safety, and durability in mind.

Thanks to its well-thought-out design, this attachment is ideal for difficult terrain conditions, and its parameters are categorized by carrier weight, making it easy to perfectly match it to your machine.

Where will a mini excavator drilling rig prove useful?

A mini excavator drilling rig is highly popular equipment with a wide range of applications. The WPK-4 model is used in the following industries:

• Fencing work: Essential for rapid drilling of holes for posts and fence posts.
• Orchards and agriculture: Ideal for erecting support posts for plants, posts for building plant and tree covers, and preparing holes for trees and shrubs.
• Construction: Enables the execution of foundation piles and drilling in dense, demanding soils.

Why is the WPK-4 the optimal drilling rig for your mini excavator?

When choosing earthmoving attachments, compatibility is key. Every mini excavator drilling rig requires matching its weight to the mini excavator’s mass and the oil flow parameters to the pump’s capacity. The WPK-4 model has been optimized for machines weighing from 1 to 3 tons.

A huge advantage of our mini excavator drilling rig is the built-in pressure relief valve limiting the pressure to 180 bar. This intelligent solution effectively prevents damage to the drilling rig caused by excessive pressure from the mini excavator, protecting your equipment against costly breakdowns. You receive a complete drilling rig in the set – with durable hydraulic hoses.

Another advantage of the mini excavator drilling rig is the S-46 drive, which is heat-treated – this significantly extends its lifespan. Applying this technology increases the components’ resistance to abrasion and material fatigue, even under heavy loads. As a result, the mechanism maintains full efficiency for many years of intensive use.

Technical parameters of the WPK-4 drilling rig

Drilling capacity (Diameter and maximum depth):

• Ø 100 mm: max depth 4 m
• Ø 200 mm: max depth 3 m
• Ø 300 mm: max depth 2 m
• Ø 400 mm: max depth 1 m (drilling only with a partial flight auger)
• Ø 500 mm: max depth 1 m (drilling only with a partial flight auger)

Complete the set: Augers, heads, and extensions

The hydraulic mini excavator drilling rig is sold without drilling accessories, however, our offer includes a full range of accessories manufactured by Staltechnika. We offer top-quality 1.2 m long augers (thick-walled main pipe, 8-12 mm flights) in a diameter range from 100 mm up to 500 mm.

We offer augers with cutters:

• Standard – for standard soils.
• Carbide (tungsten carbide) – for difficult and hard soils.

If you need to drill deeper, we offer dedicated extensions for the S-46 connection in lengths of 1 m, 1.5 m, and 2 m.

Mini excavator drilling rig – compatibility with popular brands

Our mini excavator drilling rig WPK-4 has been designed with versatility in mind. Thanks to optimized requirements for oil flow (18-45 l/min) and operating pressure (180 bar), this device perfectly cooperates with carriers weighing from 1 to 3 tons. Customers successfully use this attachment on machines from leading manufacturers. Our hydraulic drilling rig is fully compatible with mini excavators of such brands as:

• Kubota
• JCB
• Yanmar
• Bobcat
• Caterpillar (CAT)
• Takeuchi
• Wacker Neuson
• Volvo
• Kingway and many others.

By choosing the WPK-4 model, you can be sure that the equipment will work smoothly and efficiently with your machine’s hydraulic system.

Simple and safe mounting to the mini excavator arm

We realize that every machine is different, which is why as a manufacturer we provide full flexibility regarding the mount. We precisely tailor the method of attaching the drilling rig to the end of the mini excavator according to your needs and arm specifications.

We offer two main mounting options:

• Custom pin mounting: We manufacture mounting brackets with the appropriate spacing and pin diameter (e.g., popular 25 mm, 30 mm), dedicated directly to the arm of your model.
• Quick coupler adapter plates: If your machine is equipped with a quick coupler (e.g., Lehnhoff MS01, MS03, Verachtert, or pin-grabber systems), we will prepare the appropriate adaptation so that attaching the drilling rig on the construction site takes only a few seconds.

Clockwise and counterclockwise rotation – full control and work safety

In difficult terrain work, it’s impossible to foresee everything, which is why our hydraulic mini excavator drilling rig features two-way operation of the hydraulic motor. The drilling rig supports both clockwise and counterclockwise rotation.

This is an important function from the operator’s perspective. If, while drilling a deep hole, the earth auger gets jammed in hard soil, thick roots, or hits a hidden rock, you just need to change the direction of oil flow on the machine’s control valve. Counterclockwise rotation allows you to smoothly unscrew the jammed drill without having to leave the mini excavator cabin, ensuring work safety and protecting the equipment against mechanical overloads.

Frequently asked questions – mini excavator drilling rig

Will this mini excavator drilling rig fit my model?

Yes, the WPK-4 hydraulic mini excavator drilling rig is universal for most mini excavators weighing from 1 to 3 tons, regardless of the excavator model. Proper mounting to the arm is what’s important.

What oil flow and pressure are required?

The drilling rig operates optimally at an oil flow of 18-45 l/min and a maximum hydraulic system pressure up to 180 bar. The drilling rig can also operate on an excavator with pressure above 180 bar, as the valve protects the motor and automatically regulates the pressure.

Does the drilling rig require an additional hydraulic line?

No, a standard two-way auxiliary line (e.g., breaker line, drain/supply) is sufficient for power. The drilling rig comes complete with appropriate hydraulic hoses.

How long does it take to mount the drilling rig to the mini excavator?

Mounting to the mini excavator is instant. The design with the S-46 hexagonal connection means that changing an auger or extension takes just a few minutes, allowing for seamless work on the construction site.

Does the mini excavator drilling rig have motor overload protection?

Definitely yes. We have applied a pressure relief valve, which limits the pressure to 180 bar, completely protecting the motor against pressure spikes.

What are the maintenance requirements for the mini excavator drilling rig?

The device is almost maintenance-free. You only need to regularly check the condition of hydraulic hoses, keep the connections clean, and check the wear of the cutters (teeth) on the auger, replacing them if they become blunt.

How much does the mini excavator drilling rig + auger set cost?

In order to prepare an individual, best price offer tailored to the auger diameters, please contact us. We provide prices upon request – we will send you a complete catalog.

Is the drilling rig manufactured in Poland?

Yes! We are a Polish manufacturer (Staltechnika). By choosing our equipment, you support the domestic industry.

How long is the warranty and do you have spare parts?

The equipment is covered by a full manufacturer’s warranty. As a manufacturer, we ensure continuous, immediate availability of all spare parts, including extensions, standard and carbide cutters, and replaceable teeth.