Airtac RMH Magnetic Coupling Rodless Cylinder RMH20X800S
Genuine AirTAC magnetic rodless cylinder, order code RMH20X800S from the RMH range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- BoreØ20 mm
- Stroke800 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 RMH20X800S
The RMH20X800S reaches the 800 mm maximum stroke listed for the Dia 20 mm RMH bore, the longest travel this size offers without moving up to a larger frame. The piston drives the slide through magnets with no mechanical link, so the tube stays sealed over its full length while the built-in guide rail supplies the anti-rotation accuracy a stroke this long demands.
Check the magnetic holding force of 220 N against your thrust, and remember the loading table allows 3.6 / 6 kg only up to 500 mm stroke with the allowed load falling on longer strokes. The S code includes the magnet for groove-mounted CMSH, DMSH or EMSH switches, PT1/8 ports sit on one side, and both ends carry fixed cushions with adjusting screws that can be swapped for separately ordered hydraulic shock absorbers.
Airtac RMH Magnetic Coupling Rodless Cylinder RMH20X800S Technical Specifications
| Order code | RMH20X800S |
|---|---|
| Product | Magnetic Rodless Cylinder |
| Bore | Ø20 mm |
| Stroke | 800 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
Take the RMH20X800S only when you genuinely need the full travel, since the RMH20X700S and RMH20X750S below it are shorter siblings with no other advantage to trade. If 800 mm is required but the load or side force is high, the RMH25X800S matches the stroke with 345 N holding force and a stronger Dia 25 load table on the same PT1/8 porting. Going down to the RMH16X500S is not an option here, as Dia 16 ends at 500 mm stroke with 140 N holding force.
Applications
Full-width belt transfer
Span the widest conveyor in the line with a single push, using the complete 800 mm travel so no intermediate transfer station is needed.
Vertical tote column
Lift totes between two levels over the full 800 mm travel, keeping the weight inside the derated long-stroke load figures from the catalog.
Adjustable stroke station
Set the adjusting-screw cushions to shorten effective travel when a smaller move is needed, then use the full 800 mm when the layout changes.
FAQ
What are the key figures of the RMH20X800S?
Dia 20 mm bore, 800 mm maximum stroke (tolerance +1.5 / 0 mm), double-acting magnetic coupling with built-in guide rail, holding force 220 N, PT1/8 ports, built-in magnet (S), 0.2-0.7 MPa air filtered to 40 um, speed 50-400 mm/s, -20 to +70 C, sensors CMSH / DMSH / EMSH, fixed cushions with adjusting screws.
Is 220 N holding force enough at this stroke?
The catalog advises keeping the load force below the magnetic holding force, and the Dia 20 loading case of 3.6 / 6 kg applies only up to 500 mm stroke with lower values beyond, so verify both thrust and derated load against the datasheet for an 800 mm application.