Airtac MAC Stainless Steel Mini Air Cylinder MAC40X55SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC40X55SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø40mm bore and 55mm 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
- Stroke55 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 MAC40X55SU
AirTAC's MAC40X55SU pairs a 40 mm bore with a short 55 mm stroke in a riveted round body - double acting, with a variable air cushion at both ends. At 0.5 MPa it pushes 628.3 N and pulls 527.8 N, so a realistic working figure is around 377 N; for vertical work that equals about 64 kg of lift, or 32 kg if you keep a 2:1 margin.
The barrel is precision stainless steel with the aluminium-alloy covers rolled on, and the 16 mm carbon-steel rod carries a 20 um hard-chrome plating - a combination that tolerates damp shop air and mild washdown far better than painted mini cylinders. At 0.7 MPa output climbs to 879.6 N push. Speed spans 30-800 mm/s across a 0.15-1.0 MPa (22-145 psi) supply, proof tested at 1.5 MPa (215 psi).
Airtac MAC Stainless Steel Mini Air Cylinder MAC40X55SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC40X55SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 55 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 MAC40X55SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×55 | 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 MAC40X55SU Is Used
Die ejection
Kicking stamped brackets clear of a punch die: the 628.3 N push at 0.5 MPa clears part and scrap in a 55 mm move, cushioned at both ends so the die face is not hammered.
Weld fixture clamp
A hold-down on a welding jig: roughly 377 N of usable force at 0.5 MPa keeps a steel tube seated against its stop while the torch passes.
Carton pusher
A divert pusher on a packaging conveyor: the U flat-end cover bolts flush to the frame plate, and the standard magnet trips a CMSG switch at stroke end.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC40X55SU the Right Cylinder?
Compare by push force at 0.5 MPa: the MAC25 bore makes 245.3 N if the load is lighter, while MAC50 jumps to 981.3 N when it is not. With the U flat-end back cover the cylinder bolts flush against a fixed face; FA flange, LB foot and SDB pivot brackets, plus I or Y rod knuckles, cover the rest. Air leaves through 1/8" ports and the rod ends in an M12x1.25 male thread. When air is removed the piston drifts freely - the cushion damps arrival but is not a lock - so a pilot check valve or rod lock is required wherever the load must stay put.
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 MAC40X55SU FAQ
At 0.5 MPa the 40 mm bore pushes 628.3 N and pulls 527.8 N; at 0.7 MPa that rises to 879.6 N push and 738.9 N pull. The theoretical ceiling is 128.1 kgf at 1.0 MPa. It runs on 0.15-1.0 MPa (22-145 psi), is proof tested at 1.5 MPa (215 psi) and moves at 30-800 mm/s.
Each end has a variable air cushion with its own needle screw. Back the screws fully off for the first run, then close them gradually until end-of-stroke knock disappears - over-tightening slows the piston unnecessarily. The magnet built into the piston works with CMSG, DMSG and EMSG switches.
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