Airtac MARU Stainless Steel Mini Cylinder MARU20X65S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU20X65S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø20mm bore and 65mm 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
- Stroke65 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 MARU20X65S
Small, sealed and rolling-packed, the MARU20X65S is a 20 mm bore, 65 mm stroke round-body mini cylinder. The stainless tube resists splash and humidity, the hard-chromed 8 mm rod slides in grease-storing piston seals, and aluminium covers are rolled onto the barrel for a joint that stays tight. It is double acting with a variable air cushion at each end, its top-mount bracket is built into the front cover, and the magnet ships as standard for CMSG, DMSG or EMSG switches.
Force at 0.5 MPa reaches 157 N pushing and 131.9 N pulling; at 0.7 MPa extend force climbs to 219.8 N. Plan on roughly 94 N of real working push at the lower pressure, which in vertical terms lifts about 8 kg with a 2:1 reserve. Dial in both cushion needles on first run-up so the 65 mm stroke ends quietly.
Airtac MARU Stainless Steel Mini Cylinder MARU20X65S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU20X65S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 65 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 MARU20X65S
| 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. |
| ×65 | 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 MARU20X65S Is Used
Test probe retraction on a PCB fixture
Lifting a spring-probe head clear of a board after test: the about-8 kg vertical reserve at a 2:1 margin is ample for a lightweight probe carriage, and the standard magnet feeds position feedback to the PLC.
Carton tab tucker on a small wrapper
Folding a flap needs a fast, short side stroke at around 90 N of working force; the cushion stops the tab tool slamming home even at 800 mm/s cycle speeds.
Guard-door latch actuator on a CNC cell
A stainless barrel survives coolant mist around machine tools, and the integrated top bracket bolts the latch mechanism straight to the guard frame.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU20X65S the Right Cylinder?
If your load needs more than the 157 N this 20 mm bore gives at 0.5 MPa, the next steps are the 25 mm bore at 245 N and the 32 mm bore at 402 N - same mounting style, same cushion behaviour. There is no MAR bore below 20 mm, so this is the entry point of the range. Air supply: 0.15-1.0 MPa (22-145 psi), filtered to 40 um, speed 30-800 mm/s.
A plain cylinder of this type will not park itself when air fails - the piston coasts to wherever the load sends it, because the cushion only damps the ends of travel. Where holding matters, add a rod lock. Ports are 1/8" and the rod carries an M8x1.25 male thread.
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 MARU20X65S FAQ
At 0.5 MPa: 157 N extend, 131.9 N retract. At 0.7 MPa: 219.8 N extend, 184.7 N retract. Theoretical peak at 1.0 MPa: 32 kgf. Proof pressure is 1.5 MPa (215 psi) against a 0.15-1.0 MPa (22-145 psi) working band.
Both stroke ends carry a variable cushion with its own needle screw. On commissioning, close each needle slightly until the load lands without a knock, then back off until the cycle time is right. Set well, the cushion lets you run near the 800 mm/s top speed or move heavier loads without hammering the covers.
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