Airtac MARF Stainless Steel Mini Air Cylinder MARF25X250S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF25X250S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø25mm bore and 250mm 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
- Stroke250 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 MARF25X250S
Long-travel 25 mm duty is the brief here: 250 mm of stroke on AirTAC's round MAR body, double acting with adjustable air cushions at each end and a front flange formed as part of the cover itself. Push is 245 N at 0.5 MPa against a 206 N pull, and the same bore reaches 343 N of push when supplied at 0.7 MPa.
Construction is a riveted stainless tube with a hard-chrome carbon steel rod, so mild corrosion and washdown do not eat it the way they do painted mini cylinders. Treat 147 N as the honest continuous force - about 12 kg lifted vertically with a 2:1 margin - and note the standard piston magnet already suits CMSG, DMSG and EMSG switches without any special build.
Airtac MARF Stainless Steel Mini Air Cylinder MARF25X250S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF25X250S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 250 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 MARF25X250S
| 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. |
| ×250 | 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 MARF25X250S Is Used
Carton flap tucker
Folds the trailing flap on a small carton sealer; the 250 mm stroke reaches across the box width and the cushioned end stops the flap being creased at full line speed.
Inspection camera lift
Lowers a vision camera onto parts on a pharmaceutical blister line; the front flange mounts the cylinder vertically above the station without any bracket set.
Lab sampler actuator
Dips a sample scoop into a process tank every cycle; routine caustic rinse-down is no problem for the stainless barrel and chrome-plated rod.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF25X250S the Right Cylinder?
Compare bores on real force: the 20 mm MAR manages 157 N at 0.5 MPa while the 32 mm MAR jumps to 402 N, so this 25 mm unit (245 N push, 206 N pull) covers the middle ground. Stroke 250 mm stays within the 500 mm catalogue maximum, though side loads should be carried by external guides to protect the 10 mm rod over that span. The integrated flange bolts directly to the machine - separate foot or flange accessories do not exist for MAR - and remember the rod will creep if air pressure is lost; a rod lock is the answer where positions must hold.
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 MARF25X250S FAQ
The 25 mm bore pushes 245.3 N and pulls 206.1 N at 0.5 MPa; at 0.7 MPa those become 343.4 N and 288.5 N. Theoretical peak is 50 kgf at 1.0 MPa. Operating range is 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), temperature -20 to +70 C, and speed 30-800 mm/s.
Each end of the barrel carries a variable air cushion with its own needle screw. On first commissioning, screw the needles in and bleed them out gradually until the load arrives at each end without shock - that lets you push the 30-800 mm/s speed range harder than an uncushioned mini would allow.
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