Airtac MARF Stainless Steel Mini Air Cylinder MARF20X500S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF20X500S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø20mm bore and 500mm 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.
- BoreØ20 mm
- Stroke500 mm
- Port size1/8"
- Acting typeDouble acting + cushion (front mount)
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X500S
Long travel meets a compact round body in the MARF20X500S: 500 mm of stroke at a 20 mm bore, the full standard range for this size. Double acting with a variable air cushion at both ends, it delivers 157 N on extension and 131.9 N on retraction at 0.5 MPa, rising to 219.8 N on push at 0.7 MPa. Its integrated front flange bracket means the cylinder bolts straight to a machine frame - no loose flange or foot to order and align.
Translate the thrust into planning numbers: expect around 94 N of practical working force at 0.5 MPa, and treat the cylinder as lifting roughly 16 kg vertically at the raw figure, or about 8 kg once you keep a 2:1 margin. Because the stainless barrel and hard-chrome rod stand up to condensation and light washdown, this long-reach pusher suits damp factory corners, outdoor conveyors and food-adjacent lines. The magnet is built in as standard, so CMSG / DMSG / EMSG switches give end-of-travel signals without a special piston.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X500S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X500S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 500 mm |
| Acting type | Double acting + cushion (front mount) |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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 MARF20X500S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| F | Front-cover mount: F = front-flange mounting. |
| 20 | Bore size in mm. |
| ×500 | 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 MARF20X500S Is Used
Cross-web print pusher
A 500 mm reach sweeps misprinted cartons across a wide inspection conveyor, and the end cushions stop the 8 mm rod snapping the load at 800 mm/s.
CNC guard door slide
The long stroke slides a light aluminium guard across a small lathe enclosure, with the magnet signaling closed position to a CMSG switch.
Bakery tray transfer
Full-width travel shifts trays between conveyor lanes in a humid bakery, where the stainless round barrel outlasts painted-steel pushers.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X500S the Right Cylinder?
At 500 mm the 20 mm bore is at its standard limit, so anything longer becomes a made-to-order stroke. With 157 N at 0.5 MPa, check side loads carefully - on a long stroke even small lateral forces bend the 8 mm rod, so guide the load externally rather than letting the rod carry it. The MAR is not a brake: on air loss the rod moves freely, so a rod lock is the fix when a parked position matters. Compare the 25 mm bore (245.3 N at 0.5 MPa) if loads grow. The F front flange is already on the cylinder, I / Y knuckles fit the rod, and the standard magnet pairs with CMSG / DMSG / EMSG switches; pressure window is 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s.
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 MARF20X500S FAQ
Bore 20 mm, 500 mm stroke (the maximum standard stroke for this bore), double acting. At 0.5 MPa: push 157.0 N, pull 131.9 N. At 0.7 MPa: push 219.8 N, pull 184.7 N. Theoretical maximum force at 1.0 MPa is 32.0 kgf. Rod 8 mm with M8x1.25 thread, 1/8" port, 0.15-1.0 MPa (22-145 psi) working pressure, 1.5 MPa = 215 psi proof, 30-800 mm/s speed, -20 to +70 C. Longer strokes would be non-standard and made to order.
The F code builds a front flange bracket into the cylinder itself, so it bolts directly to the machine without a separate flange or foot. On first run, turn the needle screws at both ends to tune the variable air cushion - on a 500 mm stroke this matters, since an unadjusted end stop at speed hammers the covers. Keep side loads off the rod by guiding the load externally.
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