Airtac MARU Stainless Steel Mini Cylinder MARU50X20S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU50X20S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø50mm bore and 20mm stroke, 1/4" 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.
- BoreØ50 mm
- Stroke20 mm
- Port size1/4"
- Acting typeDouble acting + cushion (up mount)
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
About the Airtac MARU Stainless Steel Mini Cylinder MARU50X20S
Short throw, serious muscle: the MARU50X20S squeezes a full 50 mm bore and 981.3 N of push at 0.5 MPa into just 20 mm of travel, double acting with adjustable air cushions and an up-mount bracket formed into the front cover.
The rolled stainless-steel body resists the splash zones and coolant mist that chew through painted minis, and the hard-chrome 16 mm rod keeps seal wear low. With a 20 mm stroke the piston reaches full force almost instantly - ideal for clamps and kickers. Practically, budget around 589 N of working force at 0.5 MPa; that is enough to hold sheet-metal parts through a weld cycle.
Airtac MARU Stainless Steel Mini Cylinder MARU50X20S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU50X20S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 20 mm |
| Acting type | Double acting + cushion (up mount) |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 881 N |
| 0.7 MPa | 1374 N | 1234 N |
| Max (@1.0 MPa) | 200 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 MARU50X20S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| U | Front-cover mount: U = up (top) mounting. |
| 50 | Bore size in mm. |
| ×20 | 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 MARU50X20S Is Used
Pneumatic clamp on a tube-bending fixture
Clamps the tube against the form die in 20 mm of travel; 981.3 N at 0.5 MPa keeps the pipe from creeping during the bend.
Part stopper on a rotary indexing table
Pops up to arrest the dial plate at each station; the 20 mm stroke clears the carrier rail without stealing cycle time.
Kicker on a PCB magazine loader
Flicks loaded magazines onto the elevator conveyor; the short stroke keeps the unit compact inside tight SMT line layouts.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU50X20S the Right Cylinder?
Against neighbours, the 40 mm bore manages 628.3 N at 0.5 MPa while the 63 mm jumps to 1557.9 N, so 981.3 N sits right in the mid-force band. Supply air at 0.15-1.0 MPa (22-145 psi), plumb the 1/4 in. ports, and mate the M14x1.5 rod thread to a Y or I knuckle if the load pivots. The built-in magnet pairs with CMSG, DMSG or EMSG switches out of the box. Like any double-acting cylinder without a lock, it will creep if air pressure falls - fit a rod lock for positive holding. Keep the short stroke dead square to the workpiece; even a small misalignment shows up as rod bushing wear over millions of cycles.
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 MARU50X20S FAQ
Push is 981.3 N and pull 880.8 N at 0.5 MPa; at 0.7 MPa you get 1373.8 N push and 1233.1 N pull. Theoretical top force is 200.1 kgf at 1.0 MPa. Around 589 N at 0.5 MPa is a safe working figure for fixture design.
The barrel is stainless steel with aluminium covers rolled on and a hard-chrome plated rod, so it handles coolant mist, splash zones and periodic hose-down far better than painted-steel mini cylinders. Avoid standing caustic pools on the covers and it will serve for years.
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