Airtac MARF Stainless Steel Mini Air Cylinder MARF20X20S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF20X20S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø20mm bore and 20mm 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
- Stroke20 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 MARF20X20S
A 20 mm bore round-body mini cylinder in one of the shortest strokes of the range: MARF20X20S delivers just 20 mm of travel, driven double acting with an adjustable air cushion at each end and a front flange already riveted into the front cover. Push force at 0.5 MPa is 157.0 N with 131.9 N on retract; at 0.7 MPa it climbs to 219.8 N forward.
The stainless barrel and hard-chrome plated 8 mm rod shrug off washdown and damp plant air, a real edge over painted mini bodies in food or outdoor spots. At 0.5 MPa plan on roughly 94 N of usable push once you keep a working margin, which corresponds to lifting about 8 kg vertically with a 2:1 cushion. The piston magnet is fitted as standard, so CMSG, DMSG or EMSG switches drop on without a special-order build.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X20S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X20S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 20 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 MARF20X20S
| 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. |
| ×20 | 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 MARF20X20S Is Used
Gate latch on a filling line
A 20 mm flick of a lever latch on a beverage filler gate; the 157 N push easily trips the mechanism and the short stroke keeps cycle time down.
Parts-present pusher
Knocks a small bracket off a stop on a PCB magazine loader; the standard magnet plus a CMSG switch confirms the part was ejected.
Sample clamp in a lab tester
Clamps a coupon in a small materials fixture; about 94 N of practical force holds light parts without crushing.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X20S the Right Cylinder?
If 157.0 N at 0.5 MPa feels light for the job, step up to the 25 mm bore MAR, which pushes 245.3 N under the same pressure. Note this cylinder is not a positioning device: if air is lost the rod drifts with the load, so add a rod lock where a held position matters. The 20 mm stroke version mounts by its own built-in front flange; no separate flange or foot bracket is ordered.
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 MARF20X20S FAQ
At 0.5 MPa the bore-20 barrel pushes 157.0 N and retracts with 131.9 N. At 0.7 MPa that rises to 219.8 N forward and 184.7 N back, and the theoretical ceiling of this bore is 32 kgf at 1.0 MPa. Working pressure spans 0.15-1.0 MPa (22-145 psi) with 1.5 MPa (215 psi) proof.
F stands for the integrated front-flange bracket riveted into the front cover, so no separate flange is bought. The magnet is fitted as standard, letting CMSG, DMSG or EMSG switches mount on the barrel out of the box.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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