Airtac MAC Stainless Steel Mini Air Cylinder MAC40X250SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC40X250SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø40mm bore and 250mm 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.
- BoreØ40 mm
- Stroke250 mm
- Port size1/8"
- Acting typeDouble acting + cushion
- Rod threadM12×1.25
- CushionVariable air cushion, both ends
About the Airtac MAC Stainless Steel Mini Air Cylinder MAC40X250SU
Twenty-five centimetres of stroke from a 40 mm bore gives this MAC40X250SU the muscle for gate, drawer and ejector moves on medium-duty machines. Air drives the rod both ways and variable cushions at each end tame the stop: 628.3 N of extend thrust and 527.8 N retract at 0.5 MPa, across a 0.15-1.0 MPa (22-145 psi) supply at 30-800 mm/s.
The stainless round barrel rolls straight into the aluminium covers, leaving no protruding hardware to snag in dusty cells, and the hard-chrome plated rod resists rust in damp settings. Expect about 377 N of dependable working push - enough to raise a 32 kg part vertically. Ports are 1/8 inch, the rod thread is M12x1.25, and PT taper is the default.
Airtac MAC Stainless Steel Mini Air Cylinder MAC40X250SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC40X250SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Acting type | Double acting + cushion |
| Port size | 1/8" |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MAC40X250SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 MAC40X250SU Is Used
CNC panel ejector
Ejects finished wood panels from a CNC router table along a 250 mm discharge path, cycle after cycle.
Battery-swap latch
Releases a forklift battery latch in an automated charging bay, the cushion easing the latch home without impact.
Carton flap folder
Folds top flaps on a carton sealer, with travel speed tuned anywhere between 30 and 800 mm/s to match belt timing.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC40X250SU the Right Cylinder?
Downsize to 32 mm for 402.2 N at 0.5 MPa or upsize to 50 mm for 981.3 N if the load grows. A held position is not part of the package - once air is removed the piston moves freely - so pair a rod lock or pilot check valve with loads that must stay put. The U flat ends accept FA flange, LB foot or SDB pivot brackets, and I or Y rod knuckles adapt the tip to your tooling. Long 250 mm strokes want external guides to keep bending loads 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 MAC40X250SU FAQ
Design around 628.3 N push and 527.8 N pull at 0.5 MPa. Raising supply to 0.7 MPa lifts these to 879.6 N and 738.9 N, and 1.0 MPa represents 128.1 kgf in theory.
The barrel is stainless steel and the rod carries a 20 um hard-chrome plate, so splash, humidity and washdown do not attack it the way they would a painted-steel mini. It runs on air filtered to 40 um, between -20 and +70 C.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
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