Impact profile
A 3-sided roller and a 5-sided roller provide different polygonal contact sequences. Geometry is reviewed with energy class, travel speed, route and material response.
Polygonal roller geometry guide
Use this guide to make the project discussion more precise.
A 3-sided or 5-sided impact roller changes the number of impacts and the working profile along a route. The choice belongs in a complete working-system review, not a simple geometry ranking.
Use this page to prepare the site inputs CMG needs before discussing roller geometry, energy class and tow configuration.
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Guide contents
Questions a technical buyer should resolve before selection.
Project context
Working area, turning space, access, available tow equipment and programme determine whether a geometry can be operated safely and practically.
Selection evidence
CMG currently publishes source-matched technical data for the 32 kJ and 35 kJ impact roller pages. Other geometry or model combinations remain selection-led until a matching source is approved.
Verification
Geometry does not define project acceptance. The project inspection or testing route remains the final acceptance authority.
Evidence boundary
A useful guide is clear about what it does not prove.
CMG uses this resource to organise a project conversation. It does not replace site investigation, geotechnical design, equipment documentation or the project acceptance specification.
- Do not select geometry from a label or image alone.
- Do not transfer one model-data set to an unconfirmed geometry.
- Keep roller geometry, power unit and site controls in the same RFQ.
Buyer checklist
Prepare these inputs before sending an RFQ.
- Required energy class or model discussion
- Material, moisture and working area
- Available tow tractor and turning space
- Access, gradient and route planning
- Project acceptance and delivery requirements
Decision record
Turn the research question into a reviewable equipment brief.
Use the following record as a handover between procurement, site engineering and the equipment supplier. Empty fields are signals to investigate, not assumptions to fill with a generic machine claim.
Inputs to evidence
- Required energy class or model discussion
- Material, moisture and working area
- Available tow tractor and turning space
- Access, gradient and route planning
Decision to make
- Impact profile
- Project context
- Selection evidence
Documents to request
- Source-matched model specification and configuration
- Operating and maintenance guidance for the quoted scope
- Project-specific verification and handover requirements
Related equipment
Move from the question to a CMG equipment review.
35kJ Impact Roller
High-energy polygonal roller for demanding subgrade and ground improvement projects.
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32kJ Impact Roller
A high-energy impact roller for embankment, subgrade and foundation treatment.
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30kJ Impact Roller
Balanced high-energy compaction for road base, fill and infrastructure construction.
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Video centre
Use video as context, not as unsupported proof.
Review available CMG equipment footage, then bring your project inputs to the technical discussion.
Visit the CMG video centreResource FAQ
Further questions for the project team.
What is the practical difference between 3-sided and 5-sided impact rollers?
The working profile and impact sequence differ. The suitable geometry is reviewed with energy, speed, route, tow equipment and material response.
Can CMG recommend one geometry for all projects?
No. Geometry selection depends on the working system and site conditions.
Which geometry data is currently published?
The CMG 32 kJ and 35 kJ pages publish source-matched technical parameters. Other combinations remain selection-led.
How should the geometry choice be verified?
Through project planning and the specified inspection or testing route.