Vibration and wrist RSI
Le problème
Carbon-brush grinder: 8 to 12 m/s² vibration, ELV exceeded in under 2 h, chronic RSI.
Sept Tools
Petit Potam: 0.35 m/s² measured at handle, x14+ motor lifespan, zero brushes.
Sept Tools
The concrete wall grinder built to last
Wall grinder, long-reach grinder, concrete wall grinder: whatever you call it on site. The Sept Tools wall grinder is compact, made in Roanne and built for intensive renovation work.
On a renovation site, the concrete wall grinder is the tool everyone needs and nobody wants to hold all day. Raw concrete after stripping (laitance, formwork fins, cold joints), paint to remove, degraded plaster, PVC adhesive, wallpaper, resin, bitumen: the Sept Tools concrete wall grinder handles all these substrates. The Petit Potam XM165 weighs under 5 kg, delivers 1600 W of constant torque and integrates with Mygale gantries and Gecko balancers for long runs. A professional wall grinder designed in Roanne, with spare parts in stock and a national 48-hour service network.
Measured performance
0
Brushless sound level
Comfortably below indoor exposure limits on occupied job sites.
0.35m/s²
Hand-arm vibration
Regulatory ELV 5 m/s². Sept Tools brushless: 14 times below the legal threshold.
IP65
Full sealing
Protection against concrete dust and high-pressure cleaning.
x14+
Motor lifespan
4,000 to 6,000 brushless hours versus 600 hours for a brushed motor.
Traditional method vs Sept Tools
×
Traditional method
- Brushed angle grinder at 90 dB(A)
- Vibration above 5 m/s²
- Outstretched arms, RULA threshold reached in 2 h
- Diffuse silica dust, audit difficult
- Monthly service on brushes and commutators
✓
With Sept Tools
- Brushless 60 dB(A) on occupied sites
- Vibration 0.35 m/s² (14x below threshold)
- Mygale plus Gecko: full day without pain
- HEPA H13 source capture at 99 %
- Zero motor service across 4,000 to 6,000 hours
Why Sept Tools
French brushless engineering
Brushless 1600 W
Constant torque across the full speed range, zero loss under load, x14+ lifespan.
Vibration 0.35 m/s²
Measured at the handle to EN 60745. 14 times below the regulatory 5 m/s² threshold.
Built-in ergonomics
Native compatibility with Mygale, Gecko and Eland Grinding Arm depending on the zone.
Made in Roanne
French engineering and assembly. National 48h service network, 2-year warranty.
Our wall grinding process
1
Substrate diagnosis
Concrete hardness measurement and selection of the right diamond pad.
2
Stripping / grinding
Petit Potam, Gazellomur or Fouine depending on surface and access.
3
HEPA H13 capture
IU33 Longopac, 65 l/s, continuous sealed bagging.
4
Surface check
Verification of target CSP profile for the upcoming coating.
5
Finish installation
Surface delivered ready for paint, plaster or decoration.
- 1
Substrate diagnosis
Concrete hardness measurement and selection of the right diamond pad.
- 2
Stripping / grinding
Petit Potam, Gazellomur or Fouine depending on surface and access.
- 3
HEPA H13 capture
IU33 Longopac, 65 l/s, continuous sealed bagging.
- 4
Surface check
Verification of target CSP profile for the upcoming coating.
- 5
Finish installation
Surface delivered ready for paint, plaster or decoration.
Our solutions
View all our products Discover the dedicated range
Challenges and solutions
Technical challenges and answers
Torque loss under load
Le problème
Brushed motor loses torque on dense raw concrete, forcing operator to push harder.
Sept Tools
Brushless 1600 W constant torque: no speed drop even on reinforced laitance.
Surface profile not achieved
Le problème
Without speed control the surface profile is uneven, compromising coating adhesion.
Sept Tools
Variable speed 500 to 4800 rpm with constant torque, calibrated diamond pad for code-compliant profile.
Uncaptured dust in renovation
Le problème
Grinding without extraction: 20 to 40 mg/m³ silica, 200 to 400 times the OEL.
Sept Tools
IU33 Longopac HEPA H13, source capture at 65 l/s, exposure divided by 50.
Noise on occupied sites
Le problème
Angle grinder at 90 dB(A): neighbour complaints, time restrictions, lost contracts.
Sept Tools
60 dB(A) brushless: permanent cohabitation, no time restrictions on sensitive sites.
EU silica OEL 2027
Le problème
Limit dropping from 0.1 to 0.05 mg/m³ in several EU states: unextracted tools will be banned.
Sept Tools
HEPA H13 source capture, IP65 sealed, class H compliant with anticipated 0.05 mg/m³.
Use cases
For which job sites?
Office and residential renovation
Grinding 200 m² of concrete walls per shift in offices, schools and healthcare facilities. Petit Potam delivers 30 m² per operator per shift for paint prep, while Gazellomur reaches 60 m²/h on long runs.
New-build concrete cleanup
Construction sites and civil works: removal of formwork fins and cold-joint correction. Typical rate 25 to 35 m² per shift depending on concrete hardness.
Mechanical stripping before refurbishment
Social housing and office refurbishment: removal of PVC adhesives, wallpaper and degraded coatings. Gantry-mounted Gazellomur clears over 50 m² per day with a single operator.
Hospitality and interior architecture
Progressive multi-grit grinding to reveal aggregates on exposed concrete walls. Hotels, retail, lofts: 10 to 15 m² per shift in premium finish.
Real-world conditions
External concrete wall stripping
civil engineering · raw concrete
Frequently asked questions
Your questions, answered
Which wall grinder for raw concrete?
For surfaces below 50 m², the Petit Potam XM165 is the best balance of power, ergonomics and compactness. For larger areas, the gantry-mounted Gazellomur with load compensator dramatically reduces operator fatigue.
Are your grinders compatible with class H vacuums?
Yes. The entire range works with the IU33 Longopac and the IU40, IU51, IU81 range. All models meet class H requirements with HEPA H14 compatibility for hazardous dust collection including crystalline silica.
What is the standard delivery lead time?
Machines are assembled in Roanne and shipped within 5 to 10 working days depending on stock. Short-term rentals can be offered as a stopgap while waiting.
Can I trial a machine before buying?
Yes. We regularly run on-site demonstrations across France. Contact our team to schedule a trial on your job site with your actual material.
What warranty applies to the brushless motor?
All brushless motors carry a 2-year parts and labour warranty. The brushless design typically delivers fourteen times the lifespan of equivalent brushed motors in real-world use.
Need a quote or a demo?
Our sales team will help you choose your professional tools.