Airtac MARF Stainless Steel Mini Air Cylinder MARF20X225S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF20X225S is a genuine double acting + cushion (front 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 (front mount)
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X225S
For gated or indexing machines that need a quarter-metre reach, the 225 mm stroke on this 20 mm front-flange MAR keeps the body compact. Air works both directions: 157.0 N out and 131.9 N back at 0.5 MPa, 219.8 N and 184.7 N at 0.7 MPa, with the cushions tamed by twin needle screws.
Long strokes magnify side load, so the hard-chrome 8 mm rod and stainless barrel matter here: they hold alignment and survive washdown that would corrode painted minis. In vertical use the 157.0 N push corresponds to about 16 kg; halve it and you can lift around 8 kg parts with a 2:1 margin. A built-in magnet feeds CMSG, DMSG or EMSG switches at no extra cost.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X225S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X225S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 225 mm |
| Acting type | Double acting + cushion (front 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 MARF Stainless Steel Mini Air Cylinder MARF20X225S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| F | Front-cover mount: F = front-flange 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 MARF Stainless Steel Mini Air Cylinder MARF20X225S Is Used
Case push-off at a carton erector
Clears a formed case from the erecting station; 225 mm of travel and 157 N of push shift empty corrugated blanks with ease.
Probe retract on a weld fixture
Pulls a sensor probe clear of the weld head each cycle; 131.9 N of retract force at 0.5 MPa handles the spring-loaded arm.
Lane-change diverter on a roller conveyor
Steers small totes between two lanes; run near 800 mm/s and let the twin cushions kill the end-of-stroke shock.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X225S the Right Cylinder?
At 225 mm this is a long, slender cylinder: keep the load guided so the 8 mm rod sees thrust, not bending. If 157.0 N at 0.5 MPa is marginal, the 25 mm bore pushes 245.3 N under the same pressure. Position holding on air loss is not part of the design, so specify a rod lock. The integrated front flange plus standard magnet (CMSG / DMSG / EMSG) cover mounting and sensing in one unit.
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 MARF Stainless Steel Mini Air Cylinder MARF20X225S FAQ
Push 157.0 N and pull 131.9 N at 0.5 MPa; push 219.8 N and pull 184.7 N at 0.7 MPa; 32 kgf theoretical maximum at 1.0 MPa. Speed 30-800 mm/s, temperature -20 to +70 C, air filtered to 40 um, working pressure 0.15-1.0 MPa (22-145 psi).
No: the bore-20 barrel keeps its 1/8 ports and M8x1.25 male rod thread, and the front flange is already part of the cover. Cushions are adjustable at both ends, and a separate flange or foot is unnecessary since the integrated bracket does the mounting.
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