Airtac MARU Stainless Steel Mini Cylinder MARU20X125S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU20X125S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø20mm bore and 125mm 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
- Stroke125 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 MARU20X125S
AirTAC built the MARU20X125S for light pushing work over 125 mm: expect 157 N forward and 131.9 N back at 0.5 MPa, with 219.8 N available at 0.7 MPa and a theoretical ceiling of 32 kgf at 1.0 MPa. The top-mount bracket is part of the front cover itself - a U pattern riveted to the barrel - so installation takes a few bolts and no separate mounting hardware. It runs 30-800 mm/s on air filtered to 40 um at 0.15-1.0 MPa (22-145 psi).
For vertical lifts: 157 N at 0.5 MPa corresponds to roughly 16 kg, so plan on about 8 kg as a comfortable vertical lift with a 2:1 margin. The stainless tube and hard-chrome plated rod resist corrosion in wet or outdoor corners where painted mini cylinders bubble and seize, and the heterogeneous piston seal holds its grease in place for long service intervals. Twin variable cushions and the standard magnet for CMSG, DMSG or EMSG switches round out the package.
Airtac MARU Stainless Steel Mini Cylinder MARU20X125S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU20X125S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 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 MARU20X125S
| 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. |
| ×125 | 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 MARU20X125S Is Used
Sortation gate swing
Actuate a diverter gate that routes small parcels between two conveyor spurs, with the cushion absorbing the gate's momentum at each end.
Fixture slide clamp
Push a sliding clamp jaw over 125 mm onto a machined casting, keeping the clamped position secure with an external lock where needed.
Chute gate extension
Extend a sliding chute or hopper gate to open flow, using about 8 kg of practical vertical capacity for the moving gate weight.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU20X125S the Right Cylinder?
The 1/8" ports and M8x1.25 rod thread match all 20-40 mm MAR bores; a 25 mm bore MAR is the step up if you need 245.3 N of push at 0.5 MPa instead of this cylinder's 157 N. Over a 125 mm stroke, avoid cantilevered or twisting loads on the 8 mm rod - guide them in a bushing or slide. Remember the MAR has no holding function: if air pressure fails, the rod moves with the load, so specify a rod lock for fail-in-place fixtures.
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 MARU20X125S FAQ
Extension: 157 N at 0.5 MPa and 219.8 N at 0.7 MPa. Retraction: 131.9 N at 0.5 MPa and 184.7 N at 0.7 MPa. Maximum theoretical output is 32 kgf at 1.0 MPa. The 125 mm stroke is a standard length for this 20 mm bore.
Anytime. The magnet is fitted on every MA piston as standard, so CMSG, DMSG or EMSG switches slide onto the stainless barrel and clamp wherever you need end-of-stroke or mid-stroke signals - no modified cylinder required.
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