Airtac MARF Stainless Steel Mini Air Cylinder MARF20X300S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF20X300S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø20mm bore and 300mm 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
- Stroke300 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 MARF20X300S
A 300 mm reach from only a 20 mm bore makes the MARF20X300S a slim long-throw pusher. Air works both ways - it is double acting - and the variable cushion at each end soaks up stop shock. The F code brings a front-flange mount formed into the head, pushing 157 N and pulling 131.9 N at 0.5 MPa (22-145 psi).
At 0.5 MPa this bore can lift about 16 kg against gravity on paper; halve that for a 2:1 margin and you can plan vertical lifts of roughly 8 kg. The magnet is installed as standard, so CMSG / DMSG / EMSG switches clip on for stroke-end sensing without a special piston.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X300S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X300S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 300 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 MARF20X300S
| 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. |
| ×300 | 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 MARF20X300S Is Used
Flap tucker on a benchtop case sealer
Folds bottom flaps of small cartons at up to 800 mm/s, with the air cushion easing each tuck.
Part clamp on a rotary drilling fixture
About 94 N of practical clamp force holds aluminium brackets against a drill bushing plate.
Metering gate on a powder dosing hopper
Long 300 mm travel opens and closes the slide fully, and DMSG switches flag the open and closed ends.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X300S the Right Cylinder?
Compare upward: the 25 mm bore doubles the push to 245 N and the 32 mm bore reaches 402 N, both at 0.5 MPa. Over a 300 mm stroke the 8 mm rod is slender, so guide side loads in slides or links rather than on the rod itself. If the load must stay put with air off, this cylinder will not hold it on its own - spec a rod lock alongside. The integrated flange replaces a separate mounting accessory; only I or Y knuckles are needed on the rod.
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 MARF20X300S FAQ
Push at 0.5 MPa is 157.0 N and pull is 131.9 N; at 0.7 MPa push reaches 219.8 N and pull 184.7 N. The 1.0 MPa theoretical ceiling is 32.0 kgf. Ports are 1/8", the rod thread is M8x1.25, and the working band runs 0.15-1.0 MPa (22-145 psi) at 30-800 mm/s.
No. Every MA-series cylinder including the MARF20X300S ships with the magnet built in, so CMSG, DMSG and EMSG switches detect the piston without any special-order option. The cushion needles at both ends are adjustable too, so you can soften the stops during first run-up.
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