Airtac RMH Magnetic Coupling Rodless Cylinder RMH20X450S
Genuine AirTAC magnetic rodless cylinder, order code RMH20X450S from the RMH range. The options this code selects are decoded below; series data follow the official AirTAC catalog.
- BoreØ20 mm
- Stroke450 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 RMH20X450S
This AirTAC RMH variant stretches the Dia 20 mm bore to a 450 mm stroke while keeping the magnetically driven, rail-guided slide: the piston is isolated from the carriage, the tube stays sealed, and the extra rail raises accuracy and load capacity. Adjusting screws give fixed cushions at both ends, and hydraulic shock absorbers can be ordered separately for harder stops.
AirTAC rates the Dia 20 bore at 220 N holding force with a 3.6 / 6 kg permissible load up to 500 mm stroke, so 450 mm is close to the end of that full-load window. It runs 50 to 400 mm/s on 40 um-filtered air at 0.2 to 0.7 MPa from -20 to +70 C, takes PT1/8 ports on one side, and fits CMSH, DMSH or EMSH switches in its groove.
Airtac RMH Magnetic Coupling Rodless Cylinder RMH20X450S Technical Specifications
| Order code | RMH20X450S |
|---|---|
| Product | Magnetic Rodless Cylinder |
| Bore | Ø20 mm |
| Stroke | 450 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
RMH20X450S is the stroke to pick over RMH20X400S when the last 50 mm matters and over RMH20X500S when you want to remain comfortably inside the 500 mm full-load table for the Dia 20 bore. Travel beyond 500 mm, as on RMH20X800S, carries a reduced permissible load, so staying at 450 mm preserves the 3.6 / 6 kg rating. The supplied thread is PT1/8; the ordering code adds G for G threads or T for NPT, giving RMH20X450SG and RMH20X450ST.
Applications
Tote handling in deep racking
Reach 450 mm into shelving to push or pull light totes; the magnetic coupling withstands 220 N, and the sealed tube keeps shelf dust out of the piston chamber.
Case blank squaring
Square case blanks across a 450 mm span before sealing; the guide rail resists rotation so the squaring fence stays parallel without separate guides.
Test bench positioning
Set a specimen or fixture at any point in 450 mm of travel; EMSH, DMSH or CMSH switches in the groove give repeatable stop positions on 0.2 to 0.7 MPa air.
FAQ
What are the main specifications of the RMH20X450S?
Dia 20 mm bore, 450 mm stroke, double-acting magnetic coupling with guide rail, 220 N holding force, 3.6 / 6 kg permissible load to 500 mm, PT1/8 ports, 0.2 to 0.7 MPa operating pressure (proof 1.2 MPa / 175 psi), 50 to 400 mm/s, -20 to +70 C.
Is the load rating affected at 450 mm of stroke?
No. AirTAC's Dia 20 load table allows 3.6 / 6 kg up to 500 mm of stroke and reduces it on longer builds, so 450 mm keeps the full rating; confirm the exact derated values beyond 500 mm from the datasheet.