Airtac MAC Stainless Steel Mini Air Cylinder MAC25X40SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC25X40SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø25mm bore and 40mm 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
- Stroke40 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 MAC25X40SU
Flat at the back and busy in front, the MAC25X40SU uses its U flat-end cover for direct face mounting to a plate or frame. The 25 mm bore works double acting with a variable air cushion at both ends; expect 245 N of push at 0.5 MPa, 206 N of pull, and 343 N of push at 0.7 MPa.
Inside the riveted stainless barrel, heterogeneous piston seals hold their own grease, so lubrication chores stay minimal in dusty plants. Treat about 147 N as the practical force available for real work at 0.5 MPa; the standard piston magnet lets CMSG, DMSG or EMSG switches read position anywhere on the 40 mm stroke.
Airtac MAC Stainless Steel Mini Air Cylinder MAC25X40SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC25X40SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 40 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 MAC25X40SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×40 | 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 MAC25X40SU Is Used
Flap tucker on a case packer
The flat U cover face-mounts to the packer frame; 245 N at 0.5 MPa folds cardboard flaps in a 40 mm move while the air cushion keeps the fold from banging home.
Position flag actuator on a CNC jig
A pin pushed by the rod trips a limit flag on a machining jig; the standard magnet and a DMSG switch confirm extension and retraction without external proxies.
Bench press for small bushings
At 0.7 MPa the bore reaches 343 N, enough to seat light bushings on a workbench press; the hard-chrome rod resists the metal dust such benches generate.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X40SU the Right Cylinder?
If 245 N at 0.5 MPa is far more than the job needs, the 20 mm bore at 157 N saves air; if the load grows, the 32 mm bore delivers 402 N. This bore uses 1/8 in ports and an M10x1.25 male rod thread. Remember the rod is free to move whenever air is removed - position holding calls for a rod lock or pilot check valve. The U flat-end cover suits fixed, face-mounted frames, with FA flange or LB foot options when the layout demands them.
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 MAC25X40SU FAQ
At 0.5 MPa: 245 N extend, 206 N retract. At 0.7 MPa: 343 N extend, 289 N retract. Theoretical ceiling at 1.0 MPa is 50 kgf. Proof pressure is 1.5 MPa (215 psi) and the working range is 0.15-1.0 MPa (22-145 psi).
Both ends carry a variable air cushion with its own needle screw. Back the screws fully off before the first strokes, then close them gradually until end-of-stroke impact disappears. Within the 30-800 mm/s speed band this lets heavier loads arrive softly without hammering the covers.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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