Airtac MARF Stainless Steel Mini Air Cylinder MARF50X25S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF50X25S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø50mm bore and 25mm stroke, 1/4" 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.
- BoreØ50 mm
- Stroke25 mm
- Port size1/4"
- Acting typeDouble acting + cushion (front mount)
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
About the Airtac MARF Stainless Steel Mini Air Cylinder MARF50X25S
Short-travel pressing is the natural job for the MARF50X25S: a 50 mm bore, 25 mm stroke, front-flange MAR whose riveted stainless barrel and hard-chrome plated 16 mm rod laugh at damp or washdown conditions that would pit painted minis. It is double acting, cushioned at both ends, and delivers 981 N on extend with 881 N on the return at 0.5 MPa.
Used vertically at 0.5 MPa the bore can lift roughly 100 kg; keeping a 2:1 margin brings that to about 50 kg, a handy yardstick when matching real part weights. The magnet comes built in, so CMSG, DMSG or EMSG switches bolt on without any special-order piston.
Airtac MARF Stainless Steel Mini Air Cylinder MARF50X25S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF50X25S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 25 mm |
| Acting type | Double acting + cushion (front mount) |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 881 N |
| 0.7 MPa | 1374 N | 1234 N |
| Max (@1.0 MPa) | 200 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 MARF50X25S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| F | Front-cover mount: F = front-flange mounting. |
| 50 | Bore size in mm. |
| ×25 | 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 MARF50X25S Is Used
Lug riveting on harnesses
The 25 mm stroke suits a bench riveter closing terminal lugs with about 589 N of usable push.
Vial rejection kicker
Flicks off-spec vials aside at a filling line; the short stroke fits the tight pitch beside the starwheel.
Lens-holder clamping
Clamps optical holders during CNC deburring, where the 50 mm bore grips firmly without over-force.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF50X25S the Right Cylinder?
Compare forces before committing: a 40 mm MAR makes 628 N at 0.5 MPa and a 63 mm one makes 1558 N, so pick 50 mm when the load sits between those bands. At 25 mm stroke there is no long-rod side-load concern, but the variable cushion still earns its keep on fast presses approaching 800 mm/s. On air loss the piston simply drifts - this is not a holding cylinder - so add a rod lock where position must persist. The flange is moulded into the front cover rather than bolted on afterwards, and no separate foot accessories apply to MAR.
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 MARF50X25S FAQ
At 0.5 MPa it pushes 981.3 N and pulls 880.8 N; at 0.7 MPa the extend force is 1373.8 N, and the theoretical maximum for the 50 mm bore is 200.1 kgf at 1.0 MPa. Operating range is 0.15-1.0 MPa (22-145 psi) with 1.5 MPa (215 psi) proof pressure, speed 30-800 mm/s, and the 25 mm stroke is a standard one within the 500 mm cap.
Its round body is a stainless-steel tube riveted to aluminium-alloy covers, with a hard-chrome plated 16 mm rod - a build that shrugs off the humidity and mild splash that corrode painted-steel minis. It runs on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi) and from -20 to +70 C.
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