Airtac RMH Magnetic Coupling Rodless Cylinder RMH20X500S
Genuine AirTAC magnetic rodless cylinder, order code RMH20X500S from the RMH range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- BoreØ20 mm
- Stroke500 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 RMH20X500S
The RMH20X500S pairs a Dia 20 mm bore with a 500 mm stroke in AirTAC's RMH rodless platform. Magnets couple the piston to the outer slide, so the tube stays fully sealed and no piston rod takes up space, while the built-in guide rail raises running accuracy, anti-rotation accuracy and load capacity. Both ends carry fixed cushions on adjusting screws that can be replaced by hydraulic shock absorbers ordered separately.
This 500 mm stroke sits right at the edge of the catalog's Dia 20 loading case of 3.6/6 kg up to 500 mm stroke, so the 220 N magnetic holding force and that load table are the first figures to verify. PT1/8 ports sit on one side, and CMSH, DMSH or EMSH sensors clip into the built-in groove for position feedback at 50 to 400 mm/s on air filtered to 40 um.
Airtac RMH Magnetic Coupling Rodless Cylinder RMH20X500S Technical Specifications
| Order code | RMH20X500S |
|---|---|
| Product | Magnetic Rodless Cylinder |
| Bore | Ø20 mm |
| Stroke | 500 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
Among the Dia 20 family, RMH20X400S keeps extra load reserve if your carriage is heavier, while RMH20X600S runs past the 500 mm loading case and needs a derating check. If your load exceeds 3.6/6 kg or you need more than 220 N holding force, step up to RMH25X500S (345 N, 4.8/8 kg). This code ships with PT threads; the catalog also lists RMH20X500SG (G) and RMH20X500ST (NPT) for Dia 20.
Applications
Sliding gate on packing machines
A 500 mm horizontal slide for gates or diverters where a rod cylinder would overhang the frame; the sealed tube keeps packing dust away from the piston chamber.
Push-off station beside a conveyor
Moves cartons off the belt over a 500 mm throw, with a CMSH sensor in the groove confirming end positions at speeds up to 400 mm/s.
Indexing slide on an assembly fixture
The built-in guide rail carries side loads directly, so a 500 mm index move needs no external linear guides for loads up to 3.6/6 kg.
FAQ
What are the key figures of the AirTAC RMH20X500S?
Dia 20 mm bore, 500 mm stroke, PT1/8 ports, magnetic coupling with 220 N holding force, operating pressure 0.2-0.7 MPa, speed 50-400 mm/s, temperature -20 to +70 C, load case 3.6/6 kg up to 500 mm stroke, stroke tolerance +1.5/0 mm for strokes of 251-800 mm.
Can I run the full rated load at the end of the 500 mm stroke?
The catalog's Dia 20 loading case of 3.6/6 kg is given up to 500 mm stroke, and the allowed load falls on longer strokes, so 500 mm is the boundary of that table. Confirm your moment and overhang against the datasheet load curves, or move up to the Dia 25 RMH25X500S if you need margin.