Airtac MARU Stainless Steel Mini Cylinder MARU20X250S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU20X250S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø20mm bore and 250mm 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
- Stroke250 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 MARU20X250S
A 250 mm stroke from a 20 mm round body makes this MAR one of the longest-reaching up-mount minis in the range, still double acting with adjustable air cushions at each end. Its 157 N push at 0.5 MPa equals roughly 16 kgf of raw lift - budget around half of that, about 8 kg, for a safe vertical job.
Stainless tube and a 20 um hard-chrome rod give it real washdown resilience that painted minis lose quickly, and the rolling-packed covers keep the seal tight over the long travel. The up-facing bracket is already part of the cylinder, and the piston magnet is fitted as standard so EMSG switches drop straight onto the barrel.
Airtac MARU Stainless Steel Mini Cylinder MARU20X250S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU20X250S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 250 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 MARU20X250S
| 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. |
| ×250 | 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 MARU20X250S Is Used
Case-pack flap tucker
Mounted up-facing over the packer, the rod folds the last flap on small cases; 157 N at 0.5 MPa is ample for cardboard, and the cushion prevents the flap snapping shut.
Pharma tray reject pusher
At the inspection station the 250 mm stroke sweeps flagged trays off a cleanroom conveyor; the stainless barrel survives repeated IPA wipe-downs without corrosion.
Pick-module lane stop
The top bracket fixes under the lane edge and the rod pops up a light stop blade; an EMSG switch on the standard magnet confirms blade-down before totes release.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU20X250S the Right Cylinder?
Size up when needed: bore 25 offers 245 N push at 0.5 MPa and bore 40 reaches 628 N. At 250 mm of extension, keep the load guided on its own linear slide - a side load at full extension will bend the 8 mm rod. The cushion adjusts the stop, it does not lock: when air pressure is lost the rod drifts back, so spec a rod lock for fail-safe holding. Air ports are 1/8".
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 MARU20X250S FAQ
The 20 mm bore pushes 157 N and pulls 131.9 N at 0.5 MPa; at 0.7 MPa it reaches 219.8 N push and 184.7 N pull. Theoretical maximum is 32 kgf at 1.0 MPa. Working pressure is 0.15-1.0 MPa (22-145 psi) and speed is adjustable from 30 to 800 mm/s.
Yes. Every MAR ships with the piston magnet installed, so CMSG, DMSG and EMSG switches mount on the stainless barrel without a special-order piston or extra charge.
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1-Year Warranty
Covers non-human-caused product damage.
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