Airtac MAC Stainless Steel Mini Air Cylinder MAC25X55SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC25X55SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø25mm bore and 55mm 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
- Stroke55 mm
- Port size1/8"
- Acting typeDouble acting + cushion
- Rod threadM10×1.25
- CushionVariable air cushion, both ends
About the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X55SU
Double acting on air in both directions, this 25 mm bore, 55 mm stroke mini cylinder carries a variable air cushion at each end so end-of-stroke shock can be tuned down instead of hammered into the covers. At 0.5 MPa it develops 245.3 N on extend and 206.1 N on retract; keeping the real workload near 147 N leaves margin for pressure drop and seal drag.
The round barrel is drawn stainless steel rolled onto aluminium covers - a riveted pack that shrugs off washdown and condensation far better than a painted mini. A flat-end U back cover bolts straight to fixed plates without brackets, and the built-in magnet is standard, so CMSG, DMSG or EMSG switches clip on whenever position signalling is needed.
Airtac MAC Stainless Steel Mini Air Cylinder MAC25X55SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC25X55SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 55 mm |
| Acting type | Double acting + cushion |
| 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 MAC Stainless Steel Mini Air Cylinder MAC25X55SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×55 | Stroke length in mm. |
| -S | Built-in magnet for CMSG / DMSG / EMSG sensors (standard on MA series). |
| CA / U / CM | Back-cover type: CA pivot, U flat-end, CM round-end. |
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 MAC Stainless Steel Mini Air Cylinder MAC25X55SU Is Used
Injection bench ejector
Kicks small nylon housings out of a bench-top mold on each cycle; 245 N at 0.5 MPa clears a 55 mm part drop with cushioned stops.
Bottle lane pusher
Pushes misaligned PET bottles off a filling-line lane; the stainless barrel tolerates daily washdown around the filler.
Fixture clamp
Clamps PCB jig lids on an electronics assembly cell; near 147 N of usable force seats lids without crushing connectors.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X55SU the Right Cylinder?
Step down to a 20 mm bore (157.0 N push at 0.5 MPa) for lighter gate work, or up to a 32 mm bore (402.2 N) when the load grows. Like any double acting cylinder it will drift if air is lost or the valve centres, so add a pilot check valve or rod lock where a load must stay put. The SU code pairs the standard magnet with the U flat-end back cover on a 1/8" PT port; G and NPT threads are order options.
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 MAC Stainless Steel Mini Air Cylinder MAC25X55SU FAQ
At 0.5 MPa: 245.3 N push and 206.1 N pull. At 0.7 MPa: 343.4 N push. Theoretical peak is 50.0 kgf at 1.0 MPa. It runs on 0.15-1.0 MPa (22-145 psi) filtered air at 30-800 mm/s, with a variable cushion at both ends and a 1/8" PT port.
The U back cover gives a flat, tapped face that bolts directly to machine plates, so no extra foot or flange is needed for fixed mounts. The stainless barrel and hard-chrome plated rod (M10x1.25 thread) handle damp shop air, and the standard magnet accepts CMSG / DMSG / EMSG switches out of the box.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
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