Airtac MARU Stainless Steel Mini Cylinder MARU20X120S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU20X120S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø20mm bore and 120mm 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
- Stroke120 mm
- Port size1/8"
- Acting typeDouble acting + cushion (up mount)
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MARU Stainless Steel Mini Cylinder MARU20X120S
Twelve centimeters of stroke in a stainless round body - the MARU20X120S uses its 20 mm bore to generate 157 N of push and 131.9 N of pull at 0.5 MPa, climbing to 219.8 N at 0.7 MPa, at working pressures of 0.15-1.0 MPa (22-145 psi). Mounting is built in: the U front cover carries the top bracket, so the cylinder bolts straight to the machine frame without an accessory flange or foot.
Every unit ships with the piston magnet already fitted, which means CMSG, DMSG and EMSG position switches can be clipped on the day it arrives. The variable air cushion at each end is tuned by needle screws - dial them in on commissioning and you can run near the top of the 30-800 mm/s range without the covers taking a hammering. For a real-world budget at 0.5 MPa, treat about 94 N as the practical working force rather than the full 157 N.
Airtac MARU Stainless Steel Mini Cylinder MARU20X120S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU20X120S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 120 mm |
| Acting type | Double acting + cushion (up 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 MARU Stainless Steel Mini Cylinder MARU20X120S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| U | Front-cover mount: U = up (top) mounting. |
| 20 | Bore size in mm. |
| ×120 | 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 MARU Stainless Steel Mini Cylinder MARU20X120S Is Used
Tray lane indexing
Advance a food tray one station along a lane with 157 N of push, then verify the index via an EMSG switch on the standard magnet.
Light guard door lift
A vertical lift of roughly 8 kg with margin covers a small polycarbonate machine guard raised and lowered on demand.
Test rig probe advance
Feed a gauge or probe 120 mm into a benchtop test station, where the twin cushions give a repeatable, shock-free approach.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU20X120S the Right Cylinder?
At 120 mm the rod is exposed over a long span, so keep the load guided and side-force free to protect the 8 mm rod. Ports here are 1/8" with an M8x1.25 male rod thread. Should 157 N at 0.5 MPa fall short, bore 25 in the same MAR family gives 245.3 N on the extend stroke. This cylinder does not lock on air loss - the piston floats when supply drops - so pair it with a rod lock if your fixture must stay clamped through a power cut.
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 MARU Stainless Steel Mini Cylinder MARU20X120S FAQ
Push is 157 N at 0.5 MPa and 219.8 N at 0.7 MPa, while pull is 131.9 N at 0.5 MPa and 184.7 N at 0.7 MPa. The theoretical ceiling is 32 kgf at 1.0 MPa. Stroke is 120 mm on a 20 mm double-acting bore with variable air cushion at both ends.
The rolled stainless barrel and the hard-chrome plated 8 mm rod handle splash, humidity and occasional hose-down far better than painted or bare aluminium mini cylinders, which is why the MAR is a common pick near food lines and outdoors.
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