Airtac MAC Stainless Steel Mini Air Cylinder MAC25X140SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC25X140SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø25mm bore and 140mm 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
- Stroke140 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 MAC25X140SU
Machines that bolt their actuators flat to a plate get a clean fit from the MAC25X140SU, whose U flat-end back cover mounts flush over a 140 mm stroke. At 0.5 MPa the 25 mm bore extends with 245.3 N and retracts with 206.1 N, and because it is double acting with a variable cushion at each end, faster cycles do not have to mean battered covers.
The riveted stainless round barrel, alloy covers and 20 um hard-chrome rod make this a mini cylinder that keeps sealing and sliding where washdown mist or condensation would pit a coated body. The piston magnet comes standard, so CMSG, DMSG or EMSG switches drop on without a special order. For sizing, expect about 147 N of true working push at 0.5 MPa and a vertical lift capability near 12 kg once a 2:1 margin is applied.
Airtac MAC Stainless Steel Mini Air Cylinder MAC25X140SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC25X140SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 140 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 MAC25X140SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×140 | 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 MAC25X140SU Is Used
Hopper slide-gate opener
Pulling open a 140 mm slide gate beneath a plastics hopper, the flat U mount bolting straight to the gate plate and the cushion softening the closing slam.
Fixture clamp on a CNC jig
Clamping aluminum extrusions in a machining jig at 245 N and 0.5 MPa, a DMSG switch telling the control the clamp is fully seated before the cycle starts.
Die ejector on a small press
Ejecting shallow stamped parts from a die with the extend stroke, then retracting at 206.1 N with a cushioned return so the ejector plate is not hammered.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X140SU the Right Cylinder?
Between the 20 mm bore at 157.0 N and the 32 mm bore at 402.2 N of 0.5 MPa push, this 25 mm model fits mid-duty fixtures that need 140 mm of reach. Loss of air leaves the rod free to drift, so add a pilot check valve wherever a parked position must be kept. LB foot or FA flange hardware adapts the flat U end to frame rails, and with a stroke this long, external guides should carry any side load so bending stays off the rod.
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 MAC25X140SU FAQ
Output is 245.3 N push and 206.1 N pull at 0.5 MPa, or 343.4 N push and 288.5 N pull at 0.7 MPa, peaking at a theoretical 50.0 kgf at 1.0 MPa. It runs on 0.15-1.0 MPa (22-145 psi), withstands 1.5 MPa (215 psi) proof, cycles the rod at 30-800 mm/s and connects through a 1/8" port.
The barrel is stainless steel rolled and riveted to the alloy covers, and the carbon-steel rod carries 20 um of hard chrome - together they shrug off condensation, splash and periodic washdown that corrode painted or bare-aluminium minis, extending service life in food, outdoor and damp industrial settings.
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