Airtac MARU Stainless Steel Mini Cylinder MARU20X225S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU20X225S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø20mm bore and 225mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service. A variable air cushion at both ends lets you tune end-of-stroke deceleration on site.
- BoreØ20 mm
- Stroke225 mm
- Port size1/8"
- Acting typeDouble acting + cushion (up mount)
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MARU Stainless Steel Mini Cylinder MARU20X225S
With a 225 mm stroke and an up-facing top bracket, this MAR gives you a long reach from a slim 20 mm bore in one double-acting unit. Air works the piston both ways, and a variable cushion at each end soaks up end-of-stroke shock, so you can run a light gate or lifter at up to 800 mm/s without hammering the covers. At 0.5 MPa the bore develops 157 N of push, which is about 94 N of practical work once you keep a 40% reserve - enough to lift roughly 8 kg vertically.
The stainless round barrel with a hard-chrome plated rod shrugs off washdown and damp air far better than a painted mini, and the aluminium covers are rolled onto the tube for a sealed riveted body. No separate flange or foot is needed because the U bracket is built into the front cover. Every unit also ships with a magnet already in the piston, so CMSG, DMSG or EMSG switches clip straight on.
Airtac MARU Stainless Steel Mini Cylinder MARU20X225S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU20X225S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 225 mm |
| Acting type | Double acting + cushion (up mount) |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Variable air cushion, both ends |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MA-series datasheet. Barrel: stainless-steel tube (round-body, riveted rolling-packed construction); piston rod: carbon steel with 20µm hard-chrome plating; covers: aluminium alloy. Thread options: PT (blank) / G / NPT. Every MA-series cylinder ships with a built-in magnet for CMSG / DMSG / EMSG position sensors.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MARU Stainless Steel Mini Cylinder MARU20X225S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| U | Front-cover mount: U = up (top) mounting. |
| 20 | Bore size in mm. |
| ×225 | Stroke length in mm. |
| -S | Built-in magnet for CMSG / DMSG / EMSG sensors (standard on MA series). |
MA-family variants: MA / MAC (double acting ±cushion), MSA / MTA (single acting push / pull), MAD / MACD (double rod ±cushion), MAJ / MACJ (adjustable stroke ±cushion), MAR (cushioned with integrated F/U mount). Mounting accessories: FA flange, LB foot, SDB pivot; plus I and Y knuckles. Thread PT (blank) / G / NPT.
Where the Airtac MARU Stainless Steel Mini Cylinder MARU20X225S Is Used
Bakery tray-washer lid lift
The top bracket hangs the cylinder above the washer, and the 225 mm stroke raises stainless tray lids - about 8 kg vertical lift sits comfortably inside the 157 N rating at 0.5 MPa.
Fill-line gate with position check
A DMSG switch on the barrel confirms gate-open before filler nozzles fire; the magnet is already fitted, and the cushion stops the gate slamming across its 225 mm travel.
Wash-station bin lid opener
Mounted up-facing over the cleaning station, the rod tips open a light steel bin cover each cycle; the chrome rod tolerates constant splash without pitting.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU20X225S the Right Cylinder?
Bore 20 is the smallest in the MAR range; if 157 N at 0.5 MPa is tight for the job, step up to bore 25 (245 N push at 0.5 MPa) or bore 32 (402 N). Note that the cushion only softens the stroke end - on air loss the rod drifts, so add a rod lock if the position must hold. Keep side loads off the 8 mm rod over a 225 mm span; guide the load externally if the motion is not straight-line. Ports are 1/8".
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) is standard for sensors
- ✓ Back cover (CA/U/CM) & mount (FA/LB/SDB)
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Do not dismantle the riveted front/back covers.
- check On first run, back off the cushion screws and release gradually.
- check Installation by qualified personnel per AirTAC docs.
Airtac MARU Stainless Steel Mini Cylinder MARU20X225S FAQ
At 0.5 MPa it pushes with 157 N and pulls with 131.9 N; at 0.7 MPa that rises to 219.8 N push and 184.7 N pull. The theoretical maximum for the 20 mm bore is 32 kgf at 1.0 MPa. Running pressure is 0.15-1.0 MPa (22-145 psi) and speed is 30-800 mm/s.
No. The up-facing bracket is riveted into the front cover, so the cylinder bolts straight to your plate, and the piston magnet is standard - CMSG, DMSG and EMSG sensors drop on without an option order. I and Y rod knuckles still fit the 8 mm rod with its M8x1.25 thread.
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