Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø40mm bore and 20mm 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
- Stroke20 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 MAC40X20SU
Short strokes do not mean soft output: at 0.5 MPa this 40 mm bore MAC pushes 628.3 N and pulls 527.8 N over just 20 mm of travel. It is double acting with a variable air cushion at both ends, and runs at 30-800 mm/s on filtered air within 0.15-1.0 MPa (22-145 psi). Derate for real work: about 64 kgf of vertical lift is available at 0.5 MPa, or roughly 32 kg once you keep a 2:1 margin.
The U flat-end back cover gives a clean fixed mounting face without brackets. Its stainless-steel tube and hard-chrome carbon-steel rod shrug off mild corrosion, an edge over painted minis in wet food or outdoor cells. The magnet is already inside every cylinder, ready for CMSG / DMSG / EMSG switches.
Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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 MAC40X20SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 MAC40X20SU Is Used
Weld jig gate lift
Lifts a 30 kg jig gate the final 20 mm on an automotive fixture - about 64 kgf of lift at 0.5 MPa leaves a clear margin over the gate weight.
Coffee pouch seal press
Presses heat-seal jaws closed for short-clamp packaging cycles, with the variable cushion easing jaw contact instead of hammering the front cover.
Extrusion drill clamp
Clamps aluminium extrusion blanks against a drill jig; 377 N of practical working force at 0.5 MPa handles the recoil without slipping.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC40X20SU the Right Cylinder?
Size by force, not feel: a 32 mm bore yields 402.2 N at 0.5 MPa, this 40 mm bore 628.3 N, and a 50 mm bore 981.3 N. The 20 mm stroke keeps the body compact for clamps and kickers where travel is minimal.
The U flat-end back cover bolts flush to a fixed face; add FA flange, LB foot or SDB pivot brackets to suit the frame. When the valve centres, the rod is free to move, so hold loads with a rod lock or pilot check valve instead. The built-in magnet reads through CMSG / DMSG / EMSG switches for position feedback.
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 MAC40X20SU FAQ
On 0.5 MPa supply: 628.3 N extending, 527.8 N retracting. At 0.7 MPa: 879.6 N extending and 738.9 N retracting. The 1.0 MPa theoretical ceiling is 128.1 kgf. For vertical lifts that is about 64 kgf, or 32 kg with a 2:1 safety margin.
The barrel is stainless steel and the 16 mm rod is carbon steel hard-chrome plated to 20 um, so mild corrosion and washdown-style damp are handled better than by painted minis. Ports are 1/8"; G or NPT thread can be ordered in place of PT.
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Covers non-human-caused product damage.
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