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SKU: LM520NSDP
Membrane / Disc Packs
LM.520 Non Spark Disc Pack
£250.20
ex. VAT · £300.24 inc. VAT
JS9 Tight Fit Anti-Roll
H7 Precision Transition Fit
ISO 9001 Quality Assured
Technical Specifications
Rated Torque Nm
3343
Maximum Speed RPM
4200
Outer Diameter D (mm)
197
Hub Diameter H (mm)
132
Min Bore (mm)
32
Max Bore Type 2 Adapter (mm)
115
Max Angular Misalignment
0.5 deg
Disc Pack Material
AISI 304 Stainless Steel
Weight (kg)
24.04
Torsional Stiffness (MNm/Radian)
2.775
Weight
0.01kg
Standards & Fit
JS9
JS9 Keyway
Tight fit anti-roll standard
H7
Precision Transition Fit
Precision bore fit
ISO
ISO 9001:2015
Quality Assured
| Parameter | Value | Notes |
|---|---|---|
| SKU | LM520NSDP | Aroflex part number |
| Rated Torque Nm | 3343 | |
| Maximum Speed RPM | 4200 | |
| Outer Diameter D (mm) | 197 | |
| Hub Diameter H (mm) | 132 | |
| Min Bore (mm) | 32 | |
| Max Bore Type 2 Adapter (mm) | 115 | |
| Max Angular Misalignment | 0.5 deg | |
| Disc Pack Material | AISI 304 Stainless Steel | |
| Weight (kg) | 24.04 | |
| Torsional Stiffness (MNm/Radian) | 2.775 | |
| Weight | 0.01 kg | |
| Bore Tolerance | H7 | Precision transition fit |
| Material | Steel / Friction disc | Standard construction |
| Certification | ISO 9001:2015 | Quality assured |
LM.520 Non Spark Disc Pack
ATEX Certified Non-Sparking Disc Pack for Hazardous Environments
The LM.520 Non Spark Disc Pack is a heavy-duty disc pack engineered for use in volatile or hazardous environments where spark-free operation at high torque is essential. The flexible discs are manufactured from a special non-sparking alloy, with bushes and sleeves in phosphor bronze and cap screws in High Tensile Grade 12.9 steel — a material combination specifically chosen to eliminate the risk of arcs, sparks or hot surfaces during operation.
Key Benefits & Features
- ATEX Certified: Fully certified to ATEX Directive 94/9/EC, Group 2 Category 2 equipment, for safe use in explosive atmospheres.
- Non-Sparking Construction: Special alloy discs and phosphor bronze components prevent ignition sources in hazardous areas.
- Wide Operating Range: Rated for ambient temperatures between -40°C and 100°C.
- Heavy-Duty Power Capacity: Rated up to 4,200 RPM maximum speed at high torque levels.
For custom bore and keyway machining, see our in-house engineering service.
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