Clay Digger Specifications Guide: Understanding Weight, Stroke, Air Consumption and Performance Factors


A datasheet makes it tempting to choose clay diggers by one figure, as if the lightest tool were the easiest to handle and the highest blow rate the fastest. Neither shortcut is reliable. A tool that looks right on paper can still fall short if the site compressor cannot supply its airflow, the chisels in stock do not fit its shank, or it cannot work in the position the task demands.

Sound pneumatic tool selection starts with the job. When assessing a heavy duty clay digger requirement, buyers should check the documented application range before comparing individual specifications.

What Clay Digger Specifications Tell Buyers

Clay diggers are handheld construction air tools that work by pneumatic percussion. ACE Pneumatics describes them as light tools for renovation, construction, rock breaking and tunnelling work.

These tools are also called clay and trench diggers, pick hammers, utility hammers and handheld pneumatic clay diggers. Inside each one, compressed air drives a piston that strikes a chisel held in the front of the tool.

A specification sheet describes four separate aspects of the tool:

  • Physical size and weight: what the operator carries, and how much space the tool needs.
  • Percussion characteristics: how often the piston strikes and how far it travels.
  • Compressed-air demand: the pressure the tool is rated for and the airflow it uses.
  • Accessory interface: the shank shape and size that decide which chisels fit.

These figures support equipment comparison; they do not establish a tested material-removal rate.

ACE Pneumatics Clay Digger Specifications Compared

The ACE CD222 and ACE CD FL 22 differ in weight, length, blow rate, stroke, air consumption and shank type, while sharing the same piston diameter, pressure rating and inlet size.

Specification ACE CD222 ACE CD FL 22
Weight with silencer 12 kg / 26 lb 11 kg / 24 lb
Weight without silencer 11 kg / 24 lb 10 kg / 22 lb
Listed length 533 mm / 21" 495 mm / 19.5"
Blows per minute 1500 1320
Piston diameter 40 mm / 1.60" 40 mm / 1.60"
Piston stroke 88 mm / 3.46" 44 mm / 1.73"
Listed air pressure 6.2 bar / 90 psi 6.2 bar / 90 psi
Listed air consumption 19 l/s / 40 cfm 21 l/s / 45 cfm
Listed air inlet 19 mm / ¾" 19 mm / ¾"
Shank shape and listed size Hex, 22 × 82.5 mm (7/8" × 3¼") Square, 19 × 82.5 mm (¾" × 3¼")
OEM reference number 8900000121 8900000125

Metric and imperial values are reproduced as published; imperial figures are approximate.

Clay Digger Weight and Length: Handling and Working Access

Each model has two listed weights, one with the silencer fitted and one without. Compare like with like: in either configuration, the ACE CD FL 22 is listed 1 kg lighter. Mixing a with-silencer figure against a without-silencer figure would distort the comparison.

The weight difference is not a reason to remove the silencer. The source gives no noise data for either configuration.

The ACE CD FL 22 is also listed 38 mm shorter, and ACE Pneumatics states that its light weight design allows it to work in tight spaces. No minimum working clearance is published, and the source does not say how length is measured, so check access dimensions on site.

Horizontal, vertical and overhead work each place different handling demands on the operator. Follow the manufacturer's safety instructions for the position the job requires.

Clay Digger Impact Rate and Piston Stroke

Blows per minute describes how often the piston strikes the chisel. Piston stroke describes how far the piston travels on each cycle.

With the same 40 mm piston diameter, the ACE CD222 has twice the stroke and a higher blow rate than the ACE CD FL 22. That does not mean twice the impact energy, faster progress or more material removed, and a shorter stroke does not guarantee finer control.

The published data includes no impact-energy figures or removal tests, so stroke and blow rate cannot establish a performance ranking or equivalence with a paving breaker.

Clay Digger Manufacturer

Our Other Product

Chipping Hammer Steel

Clay Digger Air Pressure Requirement

Both models list an air pressure of 6.2 bar (90 psi), and that is the figure to plan around rather than a setting to raise for more output.

What counts is the pressure at the tool while it runs, not just the compressor setting. Hose length, connections and other equipment on the same supply can all reduce it.

Inquire Now for More Information
Contact Us

Clay Digger Air Consumption and Compressor Planning

Air consumption shows how much compressed air the tool uses, in litres per second (l/s) or cubic feet per minute (cfm).

ACE CD FL 22 lists consumption of 21 l/s compared with 19 l/s for ACE CD222. The source's rounded imperial figures are 45 cfm and 40 cfm respectively.

The ACE CD FL 22 is the lighter, shorter-stroke model, yet it lists the higher figure. Weight, stroke and blow rate do not predict airflow, and lower consumption does not prove greater energy efficiency.

Reaching the rated pressure does not mean a compressor can sustain it: it must also deliver enough volume while the tool draws air. The source does not state how consumption was measured, and the tool's rating is only one part of the site's total air demand, so buyers should confirm:

  • That compressor delivery is stated on a basis compatible with the tool's consumption figure.
  • How many other tools will draw from the same supply at the same time.
  • That hoses, connections and distribution are suitable for the required flow.

Clay Digger Shank Size and Chisel Compatibility

The shank is the end of the chisel that sits in the tool, and its shape and size must match exactly. The ACE CD222 takes a 22 mm hex shank and the ACE CD FL 22 a 19 mm square shank, so their chisels are not interchangeable.

Both shanks share an 82.5 mm figure, but the source does not define what it measures. Confirm its meaning, along with collar and retention requirements, before buying chisels.

ACE Pneumatics lists a matching chisel for each model. That does not confirm that every chisel with similar dimensions will fit and retain correctly.

The air inlet is a separate check from the chisel. Both models list a 19 mm (¾") inlet, but the thread standard is not published.

Pneumatic Tool Selection Based on Application

The two models are documented for different work, so each application belongs to the model it is listed for.

ACE CD222

  • Light demolition.
  • Tunnelling.
  • Overhead work.
  • Mining and construction.
  • Use as both a pick hammer and a clay digger.

ACE CD FL 22

  • Light to medium demolition, trenching, renovation and construction work.
  • Soft tunnelling.
  • Horizontal and vertical use.
  • Rock breaking, within the challenging renovation and construction applications described for this model.

Where a job falls outside these listings, confirm suitability with the supplier before ordering.

Procurement Checks Before Ordering Clay Diggers

Before requesting a quotation, confirm:

  • The intended task and the material to be worked.
  • The working position and any access restrictions.
  • The supplied silencer configuration and applicable noise-control requirements.
  • The air pressure and delivery available at the tool on site.
  • Chisel shape, dimensions and retention requirements.
  • Air inlet connection details.
  • The documentation and model-specific spare parts required.
  • Any performance information the application genuinely depends on.

Distributors should also confirm the exact model name, OEM reference number and accessory configuration before quoting.

Quick Response Guaranteed
Email Us Now!

ACE Pneumatics Clay Digger Range

ACE Pneumatics Pvt. Ltd. manufactures and exports pneumatic tools. Its range includes rock drilling tools, pusher leg rock drills, underground rock drills, DTH hammers, jack hammers, sinker drills, paving breakers, pneumatic breakers, rivet busters, rivet hammers, clay diggers, pick hammers, chipping hammers and scabblers.

The company also supplies drilling and breaking accessories, including taper rods, integral drill rods, contractor tools and pavement breaker steel, chipping hammer steel and pneumatic chisels, and jumbo rivet buster steel and rivet sets. Each clay digger model is supported by a matching hex or square shank chisel, air line lubricators, hose pipes and model-specific spare parts.

Our Other Product

Construction Tools

Conclusion: Choosing the Right Clay Digger

A suitable clay digger is one whose size, percussion design, air demand and accessory interface all fit the same job. To discuss the right model and chisel configuration for your application, contact ACE Pneumatics.

Author Bio

Dilawar Sayyad – Global Business Manager, Ace Pneumatics Pvt. Ltd.

Dilawar Sayyad

Global Business Manager, Ace Pneumatics Pvt. Ltd.

With over 15 years of expertise in international business development, Dilawar Sayyad helps importers, dealers, and contractors grow their businesses with high-quality construction, demolition, and mining tools. At Ace Pneumatics Pvt. Ltd. — a trusted manufacturer and exporter of pneumatic and hydraulic tools with a strong reputation for precision engineering and durability — he plays a key role in expanding the global dealer network and introducing innovative solutions tailored to industry needs.

Ace Pneumatics has been serving diverse sectors for decades, offering products such as rock drills, breakers, chippers, and mining equipment, all designed to deliver performance, safety, and long-term reliability. Dilawar’s focus is on ensuring consistent supply, maintaining international standards, and supporting partners worldwide with the right tools and strategies.

He is passionate about building long-term partnerships, sharing industry insights, and helping businesses succeed by leveraging Ace Pneumatics’ proven expertise and advanced manufacturing capabilities.