Airtac MARF Stainless Steel Mini Air Cylinder MARF25X400S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF25X400S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø25mm bore and 400mm 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.
- BoreØ25 mm
- Stroke400 mm
- Port size1/8"
- Acting typeDouble acting + cushion (front mount)
- Rod threadM10×1.25
- CushionVariable air cushion, both ends
About the Airtac MARF Stainless Steel Mini Air Cylinder MARF25X400S
AirTAC built the MARF25X400S for long travel in tight quarters: a 25 mm double-acting mini cylinder with a 400 mm stroke, a variable air cushion at each end and its own front-flange bracket rolled onto the stainless barrel. At 0.5 MPa it pushes 245.3 N, and the body takes 0.15-1.0 MPa (22-145 psi) of filtered air at 30-800 mm/s.
Plan real work at about 147 N, which is 60 percent of the 0.5 MPa push and still lifts roughly 12 kg vertically with a 2:1 margin. The grease-storing piston seal keeps friction low over that 400 mm sweep, and the standard magnet lets CMSG, DMSG or EMSG switches report position anywhere along the travel.
Airtac MARF Stainless Steel Mini Air Cylinder MARF25X400S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF25X400S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 400 mm |
| Acting type | Double acting + cushion (front mount) |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 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 MARF25X400S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| F | Front-cover mount: F = front-flange mounting. |
| 25 | Bore size in mm. |
| ×400 | 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 MARF25X400S Is Used
Lane-change gate
Swings a divert gate across a conveyor lane; the 400 mm reach crosses a 500 mm belt section and the cushion settles the gate without a bang.
Washdown food slide
Pushes trays off a rinsing conveyor; the stainless barrel and chrome rod shrug off the damp environment that rusts painted minis.
Carton stack lift
Raises carton stacks about 12 kg onto a packing table, matching the safe working figure at 0.5 MPa with margin to spare.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF25X400S the Right Cylinder?
Against neighbours: a 20 mm bore gives about 157 N at 0.5 MPa, while stepping up to 32 mm buys 402.2 N. Stay here if 245 N at 0.5 MPa (343.4 N at 0.7 MPa) covers the job. The rod is 10 mm with an M10x1.25 male thread and 1/8 inch ports.
The F front flange is part of the cylinder, so no separate mounting accessory is needed and MAR does not accept FA or LB feet. On a 400 mm stroke, keep side load off the rod; guide the load externally or the 10 mm rod will bend. Note that this cylinder drifts when air is lost, so add a rod lock if the load must stay put.
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 MARF25X400S FAQ
At 0.5 MPa it pushes 245.3 N and pulls 206.1 N; at 0.7 MPa push rises to 343.4 N. Theoretical maximum output for the 25 mm bore is 50 kgf at 1.0 MPa. Port size is 1/8 inch and the rod thread is M10x1.25.
Yes, every MARF25X400S ships with a built-in piston magnet as standard, so CMSG, DMSG or EMSG switches can be strapped on the barrel for end-of-stroke or mid-stroke signalling without a special-order piston.
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