Airtac MAC Stainless Steel Mini Air Cylinder MAC40X400SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC40X400SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø40mm 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.
- BoreØ40 mm
- Stroke400 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 MAC40X400SU
Hard-chrome plated 16 mm rod inside a rolled stainless round barrel: the MAC40X400SU is aimed at humid plants and outdoor rigs where painted mini cylinders rust through. This 40 mm bore, 400 mm stroke version is double acting with a variable air cushion at each end, pushing 628.3 N at 0.5 MPa and 879.6 N at 0.7 MPa.
For vertical work that matches a payload of about 32 kg with a 2:1 margin at 0.5 MPa. Open the cushion needle screws fully at first commissioning, then close them gradually until the top 800 mm/s speed stops slamming. The U flat-end back cover bolts flat against a fixed face with no pivot hardware, and the standard magnet takes CMSG / DMSG / EMSG switches.
Airtac MAC Stainless Steel Mini Air Cylinder MAC40X400SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC40X400SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 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 MAC40X400SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | 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 MAC40X400SU Is Used
Machine-hatch lifter
Raises a 30 kg machine hatch on the flat-end U mount, keeping a 2:1 margin against its roughly 32 kg vertical capacity at 0.5 MPa.
Food-tray ejector
Ejects filled trays from a forming station on the 400 mm stroke; the riveted stainless body survives daily brine washdown.
Duct damper linkage
Drives an HVAC damper linkage through 400 mm of travel, with the air cushion easing the slam at each limit.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC40X400SU the Right Cylinder?
For lighter work the 32 mm bore delivers 402.2 N at 0.5 MPa; for heavier jobs the 50 mm bore reaches 981.3 N - this 40 mm model splits the pair at 628.3 N. Once air is lost the rod coasts with the load, so a rod lock or check valve is the answer wherever mid-stroke position matters. The U cover presents a flat rear mounting face for direct bolting, while FA flange, LB foot and SDB pivot brackets remain available. Because a 400 mm stroke magnifies side-load bending, align the payload axis and support any long linkage.
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 MAC40X400SU FAQ
Double acting: 628.3 N push and 527.8 N pull at 0.5 MPa, rising to 879.6 N push and 738.9 N pull at 0.7 MPa; peak theoretical force is 128.1 kgf at 1.0 MPa. Pressure range is 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-800 mm/s.
The U cover presents a flat, fixed rear face that bolts directly against a machine wall with no pivot hardware. The magnet is fitted as standard, so CMSG, DMSG or EMSG switches signal end positions without a special-order piston.
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1-Year Warranty
Covers non-human-caused product damage.
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