
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF50X350S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø50mm bore and 350mm 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.
With a 350 mm stroke on a 50 mm bore, the MARF50X350S delivers up to 981.3 N of push at 0.5 MPa and 1373.8 N at 0.7 MPa, double acting with a variable air cushion at each end. Its front-flange bracket is formed into the riveted aluminium-alloy front cover, so the cylinder bolts straight to the machine frame without a separate flange or foot. Air at 0.15-1.0 MPa (22-145 psi) drives the rod across 30-800 mm/s.
The body is a high-precision stainless-steel barrel with a 16 mm hard-chrome plated rod (20 um), rolled onto the covers as a sealed round-body unit - this is AirTAC's own MA-series mini cylinder, not an ISO-design clone. In damp, washdown or outdoor spots it shrugs off the mild corrosion that pits painted-steel minis. When planning loads, budget about 589 N of real working force at 0.5 MPa, which is close to 50 kg of vertical lift with a 2:1 margin, and count on the standard piston magnet to run CMSG, DMSG or EMSG switches.
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF50X350S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 350 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.
| 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.
| 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. |
| ×350 | 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.
Drives a product gate on a dairy conveyor CIP line, where the stainless barrel shrugs off daily caustic rinse.
Pushes bread trays off a rack loader; the variable cushion lands each 350 mm throw softly at line speed.
Opens and closes a brewery tank hopper gate, lifting around 50 kg vertically with a 2:1 margin.
Compare with the 40 mm bore (628.3 N push at 0.5 MPa) if the job is lighter, or step to the 63 mm bore (1557.9 N) for heavier thrust; both stay in the same MA family. A 350 mm stroke carries side-load risk: keep the load guided on external rails so the long rod only sees tension or compression. Note also that a plain MAR drifts if air is lost - the cushion only softens the stroke end, so add a rod lock where position must be held. Mounting is the integrated F front flange, I or Y rod knuckles still thread onto the M14x1.5 male rod, and 1/4" ports feed both chambers.
Quick checklist
At 0.5 MPa it pushes 981.3 N and pulls 880.8 N; at 0.7 MPa push rises to 1373.8 N. The theoretical maximum at 1.0 MPa is 200.1 kgf. Ports are 1/4", the rod is 16 mm with M14x1.5 male thread, and the bore is 50 mm with 350 mm stroke.
Adjust the needle screws on both end caps during first run-up to soften the stroke ends across the 30-800 mm/s speed range. The magnet is built in as standard, so CMSG, DMSG or EMSG switches can be clipped on the barrel anytime to signal end positions.
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