Airtac MAC Stainless Steel Mini Air Cylinder MAC25X400SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC25X400SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø25mm bore and 400mm 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
- Stroke400 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 MAC25X400SU
Long reach in a round body: the MAC25X400SU stretches the 25 mm bore across 400 mm of travel while staying within the standard stroke range for this size. It is double acting with a variable air cushion at each end, pushing 245 N at 0.5 MPa and 343 N at 0.7 MPa.
The stainless barrel and chrome plated rod resist the corrosion that long, exposed strokes often meet near wash lines and outdoors. Rated at 245 N, the bore equals about 25 kg of theoretical vertical lift, so plan on roughly 12.5 kg with a 2:1 factor. The magnet comes built in, giving CMSG / DMSG / EMSG switch positions along the full travel.
Airtac MAC Stainless Steel Mini Air Cylinder MAC25X400SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC25X400SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 400 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 MAC25X400SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×400 | 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 MAC25X400SU Is Used
Tote picker in a narrow rack aisle
A 400 mm reach pulls totes from deep shelf positions; roughly 12.5 kg of vertical lift at a 2:1 margin suits loaded small bins, and the U cover bolts flat to the carriage.
Reject arm across a wide sorting belt
When the scanner flags a faulty pack, the rod sweeps it off across a 400 mm belt span at up to 800 mm/s; the cushion settles the arm at each end of the sweep.
Gate lift on a bottle rinsing frame
Lifting a rinse gate through 400 mm in a wet zone suits the stainless barrel and chrome rod; keep the gate near 12.5 kg so the 245 N bore holds a 2:1 margin.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC25X400SU the Right Cylinder?
Between the 20 mm bore (157 N) and the 32 mm bore (402 N), the 25 mm sits in the middle at 245 N push at 0.5 MPa. Ports are 1/8 in; rod thread M10x1.25. At 400 mm of stroke, keep side loads off the rod and guide the load externally, since the slender 10 mm rod will bend under lateral force. Air loss means drift, not a hold, so specify a rod lock or pilot check valve where the load must stay. The U flat-end cover plus an FA flange or LB foot handles fixed mounting, and the built-in magnet feeds CMSG / DMSG / EMSG switches anywhere along the barrel.
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 MAC25X400SU FAQ
Stroke length does not change force: 245 N push and 206 N pull at 0.5 MPa, 343 N push and 289 N pull at 0.7 MPa, with a theoretical 50 kgf maximum at 1.0 MPa. Speed stays 30-800 mm/s across the 400 mm travel.
No. The magnet is built into the piston as standard on every MAC, so CMSG, DMSG and EMSG switches clamp straight onto the barrel at any point along the 400 mm stroke without a special order.
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