Airtac MARF Stainless Steel Mini Air Cylinder MARF20X30S
The AirTAC Airtac MARF Stainless Steel Mini Air Cylinder MARF20X30S is a genuine double acting + cushion (front mount) standard round-body mini air cylinder with a Ø20mm bore and 30mm 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
- Stroke30 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 MARF20X30S
Short stroke, tight envelope: the MARF20X30S moves 30 mm with a 20 mm bore in a round stainless barrel barely longer than the travel itself. Double acting with an adjustable cushion at each end, it pushes 157 N and pulls 131.9 N at 0.5 MPa (22-145 psi).
The riveted body - stainless tube, aluminium-alloy covers, hard-chrome plated 8 mm rod - needs no tie-rod maintenance and tolerates splashes and humid air that corrode painted minis. Size the job around roughly 94 N of usable push at 0.5 MPa and this small cylinder handles pin-eject and clamp duties all day.
Airtac MARF Stainless Steel Mini Air Cylinder MARF20X30S Technical Specifications
| Model | Airtac MARF Stainless Steel Mini Air Cylinder MARF20X30S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 30 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 MARF20X30S
| 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. |
| ×30 | 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 MARF20X30S Is Used
Pin ejector under a 3D printer build plate
The 30 mm throw lifts finished prints off the plate, with 157 N at 0.5 MPa enough for plates up to 20 cm square.
Sample pusher in a lab autosampler
Stainless barrel and chrome rod cope with routine wipe-downs; the cushion stops vials being jarred at each end.
Swing stop on a small woodworking jig
The front flange bolts flat to the jig fence and the standard magnet feeds a CMSG switch for cycle confirmation.
Is the Airtac MARF Stainless Steel Mini Air Cylinder MARF20X30S the Right Cylinder?
This is the entry bore of the MAR line; when 157 N at 0.5 MPa leaves no margin, move to 245 N (25 mm bore) or 402 N (32 mm bore). At 30 mm stroke rod buckling and side load are non-issues, so focus on cushion setting and speed within 30-800 mm/s. Because the flange is integrated in the front cover, no separate mounting part is ordered - and the rod will not hold position if air drops, so use a rod lock where that matters. The standard magnet pairs with CMSG / DMSG / EMSG switches out of the box.
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 MARF20X30S FAQ
Push 157.0 N and pull 131.9 N at 0.5 MPa; push 219.8 N and pull 184.7 N at 0.7 MPa; theoretical maximum 32.0 kgf at 1.0 MPa. Bore 20 mm, stroke 30 mm, port 1/8", rod thread M8x1.25, operating 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s.
The barrel is stainless steel and the piston rod is carbon steel with a 20 um hard-chrome plate, while the aluminium-alloy covers are rolled on to seal the tube. Nothing relies on paint for protection, so humid food, lab and outdoor corners are fine. The cushion needles let you tune both stroke ends.
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