Airtac MAC Stainless Steel Mini Air Cylinder MAC25X275SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC25X275SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø25mm bore and 275mm 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
- Stroke275 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 MAC25X275SU
The MAC25X275SU swaps the pivot cover for a flat U end, giving a square bolt-on face for fixed mounts while keeping the 25 mm bore's 245.3 N push at 0.5 MPa. The barrel is stainless steel, rolled and riveted onto aluminium covers with a stainless block, so the joint stays sealed through vibration and humidity; the hard-chrome rod resists the scuffing that kills painted rods in gritty plants. A variable cushion at each end absorbs stop shock across the full 275 mm travel.
Two-way piston seals trap grease in their grooves, extending service intervals on long strokes. Practically, that 245.3 N rating means about 147 N of dependable work at 0.5 MPa - enough to lift roughly 12 kg vertically with a 2:1 margin. If your machine later needs position feedback, the standard magnet accepts CMSG, DMSG and EMSG switches without ordering a different piston.
Airtac MAC Stainless Steel Mini Air Cylinder MAC25X275SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC25X275SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 275 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 MAC25X275SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×275 | 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 MAC25X275SU Is Used
Clip ejection from mold fixture
After demold, the flat-end body bolts to the fixture plate and the rod ejects finished clips across 275 mm into a collection bin.
Blank pusher on a small press
One blank per cycle slides into the die; 147 N of working force at 0.5 MPa is ample for thin steel blanks.
Lab test rig actuator
A fatigue test rig uses the 275 mm stroke for slow traverse; the cushion dial keeps specimens from slamming at turnaround.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X275SU the Right Cylinder?
Forces nearby: bore 20 delivers 157 N at 0.5 MPa and bore 32 delivers 402.2 N - drop down for light, fast jobs, move up if 245.3 N feels tight. Note that with the valve centred or air off, the rod is free to drift; a rod lock or in-line check valve is the fix for static loads.
The flat U end bolts to FA flanges or LB feet. 275 mm of travel also means any misalignment multiplies into rod bending, so align the load axis or add external guideways. Port size is 1/8" on this bore.
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 MAC25X275SU FAQ
At 0.5 MPa: 245.3 N push, 206.1 N pull. At 0.7 MPa push reaches 343.4 N, and the theoretical ceiling is 50 kgf at 1.0 MPa. Ports are 1/8" with an M10x1.25 rod thread. Keep working loads near 147 N for a 30% cushion.
The stainless tube plus 20 um hard-chrome rod handle washdown, condensation and mild chemicals that pit painted or bare aluminium bodies - useful in food plants and outdoor machinery alike.
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