Airtac MARF Stainless Steel Mini Air Cylinder MARF20X180S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF20X180S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø20mm bore and 180mm 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
- Stroke180 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 MARF20X180S
In the MAR range the 20 mm bore is the lightest option, and at 0.5 MPa this cylinder extends with 157 N and retracts with 131.9 N through a hard-chrome plated 8 mm rod. The round stainless barrel is rolled onto the aluminium covers, a riveted joint that seals moisture and dust out of the working chamber on damp shop floors. It runs on filtered air at 0.15-1.0 MPa (22-145 psi).
The F code means the front flange is integral to the front cover, so mounting is a simple bolt-down with no accessory bracket. On first run set the cushion needles at each end so 30-800 mm/s travel stops soft; note the piston will not hold position if air is lost, so a rod lock is the answer where that matters. Vertical lift works out to roughly 8 kg with a 2:1 safety margin.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X180S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X180S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 180 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 MARF20X180S
| 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. |
| ×180 | 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 MARF20X180S Is Used
Cosmetic cap pressing
94 N of working force at 0.5 MPa is right for seating pump caps on 50 ml cosmetic bottles at the filler.
Tote lane shifting
Transfers 10 kg plastic totes between conveyor lanes; 180 mm of travel spans the lane gap in a single stroke.
Sorter flap control
Deflects a divertor flap on a parcel sorter; the built-in magnet with a CMSG switch confirms flap position every cycle.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X180S the Right Cylinder?
If 157 N at 0.5 MPa is marginal for the job, the next bore up, 25 mm, delivers 245.3 N push and 206.1 N pull at the same pressure. No separate FA flange or LB foot is ordered with this series - the bracket is part of the cylinder - and I or Y knuckles thread onto the M8x1.25 rod. Sensing is built in from the start, with the standard magnet pairing to CMSG / DMSG / EMSG switches.
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 MARF20X180S FAQ
Extend force is 157.0 N and retract is 131.9 N at 0.5 MPa; at 0.7 MPa expect 219.8 N and 184.7 N. Theoretical peak is 32.0 kgf at 1.0 MPa. The cylinder takes 0.15-1.0 MPa (22-145 psi) of filtered air, tolerates 1.5 MPa (215 psi) proof pressure, and cycles at 30-800 mm/s between -20 and +70 C.
Each end carries a variable air cushion. Turn the needle screws at the covers during commissioning to slow the last part of the stroke, letting you run 30-800 mm/s with heavy or fast-moving loads without impact damage. The cushion softens the stop only - it is not a brake, and the rod still drifts if air pressure is lost.
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