Airtac MAC Stainless Steel Mini Air Cylinder MAC25X425SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC25X425SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø25mm bore and 425mm 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
- Stroke425 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 MAC25X425SU
Double acting with a variable air cushion at both ends, the MAC25X425SU moves its 10 mm rod 425 mm on filtered air at 0.15-1.0 MPa (22-145 psi). A riveted stainless round barrel paired with a hard-chrome plated carbon-steel rod shrugs off mild corrosion and washdown, an edge painted-steel minis lose quickly in damp food plants or outdoor machines.
At 0.5 MPa this 25 mm bore pushes 245 N and pulls 206 N; at 0.7 MPa push rises to 343 N, with a 50 kgf theoretical maximum at 1.0 MPa. Because the magnet is built in as standard, CMSG, DMSG or EMSG switches drop on without a special-order piston. Plan on roughly 147 N of real work at 0.5 MPa rather than the full rating, which is about 12.5 kg lifted vertically with a 2:1 margin.
Airtac MAC Stainless Steel Mini Air Cylinder MAC25X425SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC25X425SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 425 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 MAC25X425SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×425 | 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 MAC25X425SU Is Used
Lane divider on a bottling conveyor
The 425 mm stroke sweeps single-file PET bottles into two lanes, and the flat-end U cover bolts flush against the pusher plate.
Carton reject pusher on a case packer
With about 147 N of usable push at 0.5 MPa, misfolded cartons tip off the belt before they reach the case erector.
Cross-slide feeder on a bench drill line
Feeds timber blanks 425 mm under the bit, with the variable cushion stopping each return without hammering the end cover.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X425SU the Right Cylinder?
Sizing check: a 20 mm MAC delivers 157 N at 0.5 MPa, while the next step up, a 32 mm bore, gives 402 N - so this 25 mm barrel suits mid-range pushes between those two. Like every double-acting MAC, it drifts if air pressure is lost or the valve centres, so fit a rod lock or pilot check valve when a load must stay put. The U flat-end back cover bolts straight to fixed plates; add an FA flange, LB foot or SDB pivot bracket, and I or Y rod knuckles, as the machine needs. Over 425 mm of stroke, guide the load or keep side forces low, because the 10 mm chrome rod will bend under lateral abuse.
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 MAC25X425SU FAQ
This 25 mm bore pushes 245.3 N and pulls 206.1 N at 0.5 MPa; at 0.7 MPa push reaches 343.4 N, and the theoretical maximum is 50 kgf at 1.0 MPa. The 10 mm hard-chrome rod carries M10x1.25 male thread, ports are 1/8", rod speed spans 30-800 mm/s, and proof pressure is 1.5 MPa (215 psi).
Both end cushions are variable: back the needle screws fully off on the first run, then close them gradually until end-of-stroke shock disappears. Dialled in properly, the cushion lets you run faster or move heavier loads without hammering the aluminium covers.
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