| Size | 40 | ||
| Stroke | 0 mm ... 2.250 mm | ||
| Max. initial tension | 5% of nominal length | ||
| Repetition accuracy muscle | <= 1% of nominal length, cyclical | ||
| Permissible angle tolerance | ≤ 1 deg | ||
| Design | Contracting diaphragm | ||
| Operating pressure | 0 bar ... 6 bar | ||
| Approval | German Technical Control Board (TÜV) | ||
| Note on operating and pilot medium | Lubricated operation possible (in which case lubricated operation will always be required) | ||
| Ambient temperature | -5 °C ... 60 °C | ||
| Theoretical Fluidic Muscle force at max. operating pressure | 6.000 N | ||
| Pneumatic connection | G3/8 | ||
| Material flange | Wrought aluminium alloy Colourless anodised | ||
| Material membrane | AR CR |
| Diameter increase with max. contraction | 80 mm | ||
| Max. contraction | 25% of nominal length | ||
| Nominal length | 120 mm | ||
| Permissible parallelism tolerance | ± 0.5% up to nominal length of 400 mm | ||
| Mounting position | optional | ||
| Symbol | 991.121 | ||
| Mode of operation | Single-acting Pulling | ||
| Operating medium | Compressed air to ISO 8573-1:2010 [7:-:-] | ||
| Corrosion resistance class CRC | 2 - Moderate corrosion stress | ||
| Max. working load freely suspended | 250 kg | ||
| Theoretical force at 0.6 MPa (6 bar, 87 psi) | 6.000 N | ||
| Note on materials | Contains paint-wetting impairment substances RoHS-compliant | ||
| Material sleeve | Wrought aluminium alloy Colourless anodised | ||
| Material nut | Steel Galvanised |
