Airtac MARF Stainless Steel Mini Air Cylinder MARF50X90S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF50X90S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø50mm bore and 90mm 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
- Stroke90 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 MARF50X90S
Need just under 100 mm of travel? The MARF50X90S covers 90 mm on a 50 mm stainless round body with the front flange built into the cover - nothing extra to bolt on. Air works both sides of the 16 mm hard-chrome rod, giving 981 N out and 881 N back at 0.5 MPa, and adjustable cushions at each end let you tune the stop to the load. Outdoors, in washdown zones or near coolants, the stainless barrel outlasts coated mini cylinders by years.
Think in working numbers, not peak ones: about 589 N of usable push at 0.5 MPa keeps duty cycles honest. For vertical work the bore will lift roughly 100 kg, or about 50 kg at a 2:1 safety factor. The magnet fitted as standard means CMSG, DMSG or EMSG switches signal end positions without any special piston order.
Airtac MARF Stainless Steel Mini Air Cylinder MARF50X90S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF50X90S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 90 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 MARF50X90S
| 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. |
| ×90 | 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 MARF50X90S Is Used
Drum-lid seating press
Seats lids on 20 litre pails at a paint-filling station; 981 N at 0.5 MPa seats gasketed lids without crushing the rim.
Conveyor end stop gate
Stops arriving heavy totes at the lane end; the cushion absorbs the impact that a rigid stop would pass into the frame.
Chute diverter actuator
Swings a grain-depot diverter chute between two silo lines; the 90 mm stroke gives the linkage the throw it needs.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF50X90S the Right Cylinder?
If 981 N of push at 0.5 MPa is more than your load needs, the 40 mm bore at 628 N frees up space; if you are stalling below it, the 63 mm bore at 1558 N is the next step. On a 90 mm stroke the rod is more exposed to bending, so support the load in linear guides rather than letting it cantilever off the rod. Air loss equals motion here - the piston is not locked and will drift under load, which a rod-lock cylinder prevents. Air ports are 1/4 inch on this bore, with PT, G or NPT thread options.
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 MARF50X90S FAQ
Design to 981.3 N push and 880.8 N pull at 0.5 MPa, or 1373.8 N push and 1233.1 N pull at 0.7 MPa. Peak theoretical force reaches 200.1 kgf at 1.0 MPa. Supply pressure spans 0.15-1.0 MPa (22-145 psi) with a 1.5 MPa (215 psi) proof rating; speed range is 30-800 mm/s.
Yes. The barrel is stainless steel rolled and riveted into aluminium covers, and the rod is carbon steel with a 20 um hard-chrome plating. In washdown zones, coolant mist or outdoor air this pair resists the surface rust that swells painted-steel mini cylinders, keeping rod seals and bearings cleaner for longer.
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