Airtac MARU Stainless Steel Mini Cylinder MARU20X50S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU20X50S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø20mm bore and 50mm 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
- Stroke50 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 MARU20X50S
AirTAC rolls the MAR series into a single riveted round body - barrel, aluminium covers and internal stainless block - and the MARU20X50S adds an upward-facing mount formed into the front cover. Double acting throughout with adjustable air cushions at both ends, it pushes 157.0 N and pulls 131.9 N at 0.5 MPa over a 50 mm stroke.
That 157.0 N works out to about 8 kg of vertical lift with a 2:1 factor, or roughly 94 N of dependable push once derated. The 20 mm bore breathes through 1/8" ports within 0.15-1.0 MPa (22-145 psi) and proof-tests at 1.5 MPa (215 psi). Every MA cylinder leaves the factory magnetized, so CMSG, DMSG and EMSG switches snap onto the barrel without a special piston order.
Airtac MARU Stainless Steel Mini Cylinder MARU20X50S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU20X50S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 50 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 MARU20X50S
| 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. |
| ×50 | 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 MARU20X50S Is Used
Divert paddle on a bakery line
Swings a paddle to route biscuit trays between two conveyors; 94 N of practical force is ample for lightweight trays and the round stainless body wipes clean of flour dust.
Fixture clamp confirm on a welding table
A 50 mm clamping stroke with an EMSG switch riding the standard magnet verifies the fixture closed before the weld robot receives its start signal.
Glue-dot marker on a corrugator
Stamps a small marker at each board joint; the hard-chrome plated rod keeps moving smoothly where adhesive mist would gum up lesser minis.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU20X50S the Right Cylinder?
Look one bore up before committing: at 25 mm the same integrated-mount format raises push force to 245.3 N at 0.5 MPa, and 32 mm reaches 402.2 N. The 50 mm stroke suits indexing and confirm-extend motions; the cylinder will not hold position if supply air fails, since the cushions only damp the stroke ends. For side loads beyond a few newtons add external guidance, and the M8x1.25 rod thread takes I or Y knuckles when the load needs a swivel.
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 MARU20X50S 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 kgf at 1.0 MPa for the 20 mm bore. Working pressure is 0.15-1.0 MPa (22-145 psi) with 1.5 MPa (215 psi) proof pressure, and speed runs 30-800 mm/s.
The barrel on this MAR cylinder is precision stainless steel rolled directly against the aluminium covers, leaving no coating to chip or rust in damp shops, washdown zones or outdoor cells. The hard-chrome plated rod adds a second corrosion barrier, and the variable cushion needles at both ends tune out end-of-stroke shock as your cycle speed changes.
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