Airtac RMH Magnetic Coupling Rodless Cylinder RMH20X700S
Genuine AirTAC magnetic rodless cylinder, order code RMH20X700S from the RMH range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- BoreØ20 mm
- Stroke700 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 RMH20X700S
The RMH20X700S carries the Dia 20 mm bore of the AirTAC RMH series through a 700 mm stroke, close to the 800 mm ceiling this bore allows. Piston and outer slide couple through magnets alone, so the tube stays fully sealed with no rod to snag, while the built-in guide rail raises running accuracy, anti-rotation accuracy and load capacity.
At this long travel the load derate matters: the catalog loading case for Dia 20 allows 3.6 / 6 kg up to 500 mm stroke, and the allowed load falls on longer strokes, so check the derated table before fixing a payload. The S option adds the built-in magnet for position sensing, air at 0.2-0.7 MPa filtered to 40 um drives the slide at 50-400 mm/s, and the fixed cushions with adjusting screws at both ends can be replaced by hydraulic shock absorbers ordered separately.
Airtac RMH Magnetic Coupling Rodless Cylinder RMH20X700S Technical Specifications
| Order code | RMH20X700S |
|---|---|
| Product | Magnetic Rodless Cylinder |
| Bore | Ø20 mm |
| Stroke | 700 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
Pick the RMH20X700S when the move is long but not maximal: the shorter RMH20X600S and below run at higher allowed loads, while the RMH20X750S and RMH20X800S buy extra travel you may not need. Against the Dia 16 sibling, the RMH16X500S stops at 500 mm stroke with 140 N holding force, so anything past that on travel or force points to this Dia 20 code. If the payload or side load is heavy at 700 mm, step up to the RMH25X700S, which raises holding force to 345 N on the same PT1/8 porting.
Applications
Long-travel belt diverter
Push product off a wide conveyor in one sweep, using the 700 mm stroke to clear the full belt width while the guide rail takes the side thrust of off-center packs.
Case transfer pusher
Slide cartons across a packaging lane between infeed and reject lanes, where the sealed magnetic coupling keeps dust out of the piston chamber.
Two-station indexing slide
Move a fixture or sensor bracket between stations roughly 700 mm apart, with CMSH or DMSH switches in the groove confirming each end position.
FAQ
What are the key figures of the RMH20X700S?
Dia 20 mm bore, 700 mm 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 (code S), 0.2-0.7 MPa air filtered to 40 um, speed 50-400 mm/s, temperature -20 to +70 C, sensors CMSH / DMSH / EMSH, fixed cushions with adjusting screws.
How much load can it carry at a 700 mm stroke?
The catalog load table for Dia 20 gives 3.6 / 6 kg up to 500 mm stroke and states that the allowed load falls on longer strokes, so at 700 mm you must confirm the derated value from the datasheet load tables before committing a payload.