Pneumatic standard cylinder SMC CD85KN25-160-B

The standardised C85K pneumatic cylinder, by SMC, adds an anti-rotation rod to the standard C85 range, available in double-acting or single-acting versions (spring return), across a bore range from Ø 8 mm to Ø 25 mm. Its angular accuracy reaches ±0.7° on the largest diameters, an advantage for assemblies requiring stable load orientation.

Features:
The rod of this cylinder remains rotation-guided throughout the stroke, which stabilises the orientation of a driven part without adding any supplementary guiding accessory. The series is available in a double-acting version, with controlled movement in both directions (extension and retraction), and in a single-acting spring-return version, rod retracted or rod extended depending on the model. An elastic cushion absorbs shocks at end of stroke and limits vibrations transmitted to the frame. Each configuration is available without a magnet or with a magnet integrated into the piston (CD85K), allowing, where required, position detection by an external sensor, to be mounted with a special mounting bracket. No lubrication is required for normal operation, which reduces periodic maintenance tasks.

Several mounting fixings are also available as options, including a bracket (single or double), a flange, a trunnion or a joint, as well as rod-end accessories such as a spherical rod end or a rod clevis, although these options are not developed here since the version offered remains the base configuration.

Specifications:
- Designation: C85KN for the base version, CD85KN with integrated magnet as an option (C = pneumatic cylinder prefix, D = integrated magnet as an option, 85K = anti-rotation rod series, N = standard rear end with integrated joint).
- Type: pneumatic.
- Action: double-acting, single rod, with anti-rotation rod (the series is also available in a single-acting spring-return version, rod retracted or rod extended, not detailed in this datasheet).
- Fluid: air.
- Available bores: Ø 8, Ø 10, Ø 12, Ø 16, Ø 20 and Ø 25 mm.
- Proof pressure: 1.5 MPa.
- Maximum operating pressure: 1.0 MPa.
- Minimum operating pressure: 0.1 MPa (Ø 8 and Ø 10), 0.08 MPa (Ø 12 and Ø 16), 0.05 MPa (Ø 20 and Ø 25).
- Ambient and fluid temperature: from -20 °C to 80 °C without position sensor (no freezing), from -10 °C to 60 °C with position sensor (no freezing).
- Lubrication: not required (oil-free operation).
- Piston speed: from 50 to 1,500 mm/s.
- Cushioning: elastic cushion.
- Permissible kinetic energy: 0.02 J (Ø 8), 0.03 J (Ø 10), 0.04 J (Ø 12), 0.09 J (Ø 16), 0.27 J (Ø 20), 0.4 J (Ø 25).
- Anti-rotation accuracy: ±1.5° (Ø 8 and Ø 10), ±1° (Ø 12 and Ø 16), ±0.7° (Ø 20 and Ø 25).
- Stroke tolerance: +1.0/0 mm (Ø 8 to Ø 16), +1.4/0 mm (Ø 20 and Ø 25).
- Standard strokes: from 10 to 100 mm (Ø 8 and Ø 10), from 10 to 200 mm (Ø 12 and Ø 16), from 10 to 300 mm (Ø 20 and Ø 25); a maximum stroke of 1,000 mm remains available on request for the larger bores.
- Base weight without magnet, standard model with integrated joint (C85KN): 39 g (Ø 8), 41 g (Ø 10), 82 g (Ø 12), 95 g (Ø 16), 189 g (Ø 20), 257 g (Ø 25).
- Additional weight per 10 mm stroke increment: 2.3 g (Ø 8), 2.5 g (Ø 10), 4.5 g (Ø 12), 5.5 g (Ø 16), 8.7 g (Ø 20), 12.2 g (Ø 25).

Standards:
ISO 6432: this standard defines the connection and mounting dimensions of single-rod, small-bore pneumatic cylinders. It guarantees mechanical interchangeability with cylinders from other manufacturers complying with the same dimensional reference.
RoHS: this directive limits the use of hazardous substances such as lead, mercury or cadmium in the manufacture of electrical and electronic components. It facilitates the integration of the cylinder into equipment subject to this European regulation.