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
60 dB(A)
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
Why choose French brushless tools?
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 Which machine for your job site?
The machines below are selected for this application: brushless motors, dust captured at the source (class H extraction) and anti-MSD design. Quote within 24h.
View product Petit Potam
The Petit Potam XM165 is our compact concrete wall grinder for surface preparation, paint removal, raw concrete grinding, plaster, adhesives and resins. Brushless 1600 W constant-torque motor, vibration measured at 0.35 m/s² (14 times below the 5 m/s² ELV threshold), 60 dB on occupied job sites. Compatible with our Mygale gantries, Gecko balancers and Eland trolleys for ergonomic work on large surfaces. IP65 sealing, x14 motor lifespan vs brushed designs. Built and assembled in France.
View product Gazellomur
The Gazellomur (grinding configuration) is our brushless 3-in-1 combo on gantry: grinding, bush hammering and planing with one machine. In grinding: 60 to 90 m²/h on concrete, 30 to 50 on plaster and adhesives, 20 to 40 on bitumen and resins. 1600 W constant torque, IP65, native ergonomics (the gantry carries the machine, the operator guides). Compatible with Sept Tools class H vacuums. Built and assembled in France.
View product Fouine XB165
The Fouine XB165 is our versatile wall and ceiling grinder, designed for renovation, construction, demolition, asbestos abatement and dismantling. Brushless 1600 W constant-torque motor, 0.35 m/s² vibration, 60 dB(A), IP65. Mounted on a Gazelle Premium or Eland trolley, it grinds concrete ceilings without holding the machine overhead. Ø165 disc for grinding, swappable bush-hammering drum in under 2 minutes. Designed in Roanne, parts in stock, national 48h after-sales.
View product Mygale
The Mygale gantry carries the grinder for wall and ceiling work, taking the load off the operator's arms. 31 kg, stable H frame, adjustable height. Compatible with Petit Potam, Fouine XB165, Gazellomur. RULA measurements: muscular load divided by 5 across 200 m² of walls vs manual grinding. Pairs with the Gecko balancer and Eland trolley for larger surfaces. Roanne, 48h after-sales.
View product Gecko
The Gecko balancer mechanically offsets the weight of the wall grinder (Petit Potam, Fouine, Gazellomur) across all positions. 12.3 kg, generous vertical and lateral travel, no battery. The operator guides the machine without bearing the load, dividing RULA-measured fatigue by 5 across 200 m² of walls. Compatible with the Mygale gantry and Eland trolley. Roanne, 48h after-sales.
View product IU33 Longopac
The IU33 Longopac is our class H construction vacuum for HEPA H13 source capture. 1100 W, 25 kg, 65 l/s flow. Longopac bagging system: continuous sealed bag, emptying without reopening, eliminating dust release on disposal. Compatible with all our grinders, planers, wall chasers and core drills. Compliant with the crystalline-silica OEL of 0.1 mg/m³ (anticipating 0.05 mg/m³ in 2027). EN 60335-2-69 annex AA. Roanne, 48h after-sales.
View product Turbo7
The Turbo7 is our compact construction vacuum for quick interventions: wall grinding, grooving, drilling. 1600 W, 9.3 kg, easy transport on stairs and floors. Class H filtration compatible, source capture via standard 50 mm hose. Ideal for apartment renovation, offices and sensitive sites where the IU33 Longopac is too bulky. Roanne, 48h after-sales.
View product IU40
The IU40 is a universal bypass motor cyclonic dust extractor designed for fine dust extraction on site. Its compact design facilitates transport and provides stable manoeuvrability. Equipped with a 22 m Longopac system, a ULPA+PTFE cartridge filter (18,500 cm2 filtration area) and an airflow of 340 m3/h, it is the ideal extraction solution for the Petit Potam and Fouine grinders.
View product IU51
The IU51 is a dual universal bypass motor cyclonic dust extractor. Extremely compact for easy transport and excellent handling, it is ideal for confined spaces. Its patented automatic filter cleaning system guarantees continuous maximum efficiency. Equipped with 2 ULPA+PTFE cartridges (22,000 cm2), an airflow of 340 m3/h and the 22 m Longopac system. Compatible with the Petit Potam, Fouine and Castor.
View product IU81
The IU81 is a triple-motor cyclonic dust extractor, the market reference in terms of durability. Its enhanced filter protection against abrasive materials and improved cyclonic effect make it the high-performance solution for demanding sites. Automatic filter cleaning (also available in manual mode). Equipped with 3 ULPA+PTFE cartridges (36,000 cm2), an airflow of 510 m3/h and the 22 m Longopac system. Compatible with the Petit Potam, Fouine and Castor.
View product IU200
The IU200 is a patented industrial dust extractor with automatic filter cleaning and a multi-filter system. Designed for continuous 24/7 operation with no maintenance, it offers exceptional durability. Industrial extraction of fine dust for a clean and safe working environment. Equipped with 5 ULPA+PTFE cartridges (100,000 cm2), a turbine delivering 1,100 m3/h and a large-capacity drum. Compatible with the Petit Potam, Fouine and Castor.
Challenges and solutions
Which challenges, and how to solve them?
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.
Contact us
Free quote, no obligation, reply within 24h. Equipment guaranteed 24 months.