Airtac MARU Stainless Steel Mini Cylinder MARU25X20S
The AirTAC Airtac MARU Stainless Steel Mini Cylinder MARU25X20S is a genuine double acting + cushion (up mount) standard round-body mini air cylinder with a Ø25mm bore and 20mm 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.
- BoreØ25 mm
- Stroke20 mm
- Port size1/8"
- Acting typeDouble acting + cushion (up mount)
- Rod threadM10×1.25
- CushionVariable air cushion, both ends
About the Airtac MARU Stainless Steel Mini Cylinder MARU25X20S
Compact clamping and positioning jobs in tight spots are the natural home of the MARU25X20S: a 20 mm stroke double-acting mini cylinder from AirTAC's MA range, with the up (U) mounting bracket already built into the front cover. The riveted stainless body seals without fasteners through the barrel, and both ends carry a variable air cushion you can trim on commissioning. Air supply 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s.
Force output is 245 N pushing and 206 N pulling at 0.5 MPa, rising to 343 N on extension at 0.7 MPa. Treat about 147 N as the honest working force at 0.5 MPa - enough to clamp or eject small parts with a proper margin. The magnet is fitted as standard, so a CMSG or EMSG switch snaps on for end-of-stroke confirmation, and the hard-chrome 10 mm rod plus stainless tube stand up to coolant mist and washdown better than painted minis.
Airtac MARU Stainless Steel Mini Cylinder MARU25X20S Technical Specifications
| Model | Airtac MARU Stainless Steel Mini Cylinder MARU25X20S |
|---|---|
| Series | MAR mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 20 mm |
| Acting type | Double acting + cushion (up mount) |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 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 MARU25X20S
| MAR | Standard round-body mini cylinder (double-acting, integrated mount, variable cushion). |
|---|---|
| U | Front-cover mount: U = up (top) mounting. |
| 25 | 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 MARU25X20S Is Used
Clamp on a small pneumatic jig
Squeezes a bracket against a locater pin in a drill jig; 245 N at 0.5 MPa holds the part while drilling and the 20 mm stroke clears for loading.
Connector push-fit on an assembly bench
Seats a small DIN connector home with 147 N of working force at 0.5 MPa, using the short stroke to avoid over-travel damage to the housing.
Presence confirm on a fixture door
Confirms a fixture lid is fully closed by probing a striker plate; the standard magnet drives an EMSG switch the instant the 20 mm stroke bottoms.
Is the Airtac MARU Stainless Steel Mini Cylinder MARU25X20S the Right Cylinder?
For a 20 mm stroke you are usually clamping, not lifting, but if you do need vertical pull, this bore will lift about 12 kg at 0.5 MPa with a 2:1 margin. A 20 mm bore would cut force to 157 N push at 0.5 MPa, while a 32 mm bore raises it to 402 N - move only if your load is far from the middle. Keep in mind the rod drifts if air pressure is lost; the cushion trims the stroke ends but does not lock anything, so fit a rod lock when position must be kept. No separate bracket is needed - the integrated top mount bolts straight down - and the rod thread is M10x1.25 with 1/8 inch ports.
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 MARU25X20S FAQ
Double acting, 25 mm bore, 20 mm stroke, 10 mm hard-chrome rod, 1/8 inch ports, M10x1.25 rod thread, up (U) mount integrated in the front cover. Push 245.3 N and pull 206.1 N at 0.5 MPa; 343.4 N and 288.5 N at 0.7 MPa; 50 kgf theoretical maximum at 1.0 MPa.
Yes - the magnet is standard equipment on every MA-series cylinder, not an option. CMSG, DMSG and EMSG switches all clip to the stainless barrel for stroke-end signalling. The variable cushions at both ends are trimmed with the needle screws during commissioning.
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