Airtac RMH Magnetic Coupling Rodless Cylinder RMH20X350S
Genuine AirTAC magnetic rodless cylinder, order code RMH20X350S from the RMH range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- BoreØ20 mm
- Stroke350 mm
- Port threadPT1/8
- ActionDouble acting, magnetic coupling
- GuideBuilt-in guide rail
- Ø10holding force 55 N · strokes to 300 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac RMH Magnetic Coupling Rodless Cylinder RMH20X350S
The AirTAC RMH20X350S is a double-acting, magnetically coupled rodless cylinder with a built-in guide rail. The Dia 20 mm piston drives the outer slide through magnets with no mechanical link, so the tube stays fully sealed, there is no piston rod to seal, and the isolated piston chamber keeps dirt away from the slide.
At 350 mm stroke this code uses a good part of the Dia 20 travel range, which extends to 800 mm. The catalog rates the Dia 20 magnetic coupling at 220 N holding force and 3.6 to 6 kg load up to 500 mm stroke, so this travel still leaves load margin before the longer-stroke derating. PT1/8 ports sit on one side, CMSH, DMSH or EMSH sensors fit the built-in groove, and both ends carry fixed cushions on adjusting screws that can be swapped for separately ordered hydraulic shock absorbers.
Airtac RMH Magnetic Coupling Rodless Cylinder RMH20X350S Technical Specifications
| Order code | RMH20X350S |
|---|---|
| Product | Magnetic Rodless Cylinder |
| Bore | Ø20 mm |
| Stroke | 350 mm |
| Port thread | PT1/8 |
| Action | Double acting, magnetic coupling |
|---|---|
| Guide | Built-in guide rail |
| Ø10 | holding force 55 N · strokes to 300 mm |
| Ø16 | holding force 140 N · strokes to 500 mm |
| Ø20 | holding force 220 N · strokes to 800 mm |
| Ø25 | holding force 345 N · strokes to 800 mm |
| Fluid | Air (filtered by 40 µm element) |
| Operating pressure | 0.2-0.7 MPa |
| Proof pressure | 1.2 MPa (175 psi) |
| Temperature | -20 to +70 °C |
| Speed | 50-400 mm/s |
| Stroke tolerance | +1.0 / 0 mm (≤250), +1.5 / 0 mm (251-800) |
| Cushion | Fixed, adjusting screws |
| Sensors | CMSH, DMSH, EMSH |
| Port | M5×0.8 (Ø10, 16), PT1/8 (Ø20, 25) |
Source: AirTAC Products Catalog 2026A (PDF01-P0612..P0613), RMH series specifications, load tables, strokes and ordering code.
How to choose
Inside the Dia 20 row, RMH20X350S sits between RMH20X300S and RMH20X400S: choose RMH20X300S when travel must stay within the 250 mm band (stroke tolerance +1.0/0 mm), and RMH20X400S when you need another 50 mm. On port thread, Dia 20 orders use a blank code position for PT, G for G and T for NPT, so RMH20X350S with PT1/8 suits the default BSP-style piping. If the 220 N coupling or 3.6/6 kg loading case is tight, step up to RMH25X350S with its 345 N holding force.
Applications
Pick-and-place slides
Move gripped parts over a 350 mm transfer while the guide rail carries the anti-rotation duty, and use a CMSH, DMSH or EMSH sensor in the groove to signal end positions.
Pusher on a conveyor line
Kick parts off a running belt with 220 N coupling force and 50 to 400 mm/s speed, fed through PT1/8 ports on air filtered to 40 um.
Packaging machine feed stroke
Advance cartons or blisters a fixed 350 mm into a sealing or filling station, with adjusting-screw cushions damping the slide at both ends.
FAQ
What are the key figures of the RMH20X350S?
Dia 20 mm bore, 350 mm stroke, double-acting magnetic coupling with 220 N holding force, PT1/8 ports, operating pressure 0.2-0.7 MPa, speed 50-400 mm/s, temperature -20 to +70 C, fixed cushions on adjusting screws, sensors CMSH, DMSH, EMSH. Stroke tolerance for the 251-800 mm band is +1.5/0 mm, and the catalog load case is 3.6/6 kg up to 500 mm stroke.
Does the 350 mm stroke reduce the allowed load on a Dia 20 RMH?
Yes, indirectly. AirTAC lists 3.6/6 kg for Dia 20 up to 500 mm stroke and states that the allowed load falls on longer strokes, so 350 mm is still inside the full-load band. Always keep the actual load force below the 220 N magnetic holding force as well; confirm the exact derated figures from the datasheet load tables.