Airtac MAC Stainless Steel Mini Air Cylinder MAC40X70SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC40X70SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø40mm bore and 70mm 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
- Stroke70 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 MAC40X70SU
Flat-mounted and fixed in line, the SU version of this 40 mm bore MAC still brings 628 N of push and 528 N of pull at 0.5 MPa - nearly 2.5 times the force of a 25 mm unit. Double-acting air works the rod both directions, and needle-adjustable cushions at each end let 70 mm cycles finish quietly even near the 800 mm/s speed ceiling.
The U flat-end back cover gives a clean fixed mounting face without pivot hardware, while the rolled stainless tube and hard-chromed carbon rod resist the corrosion that swells painted mini bodies in wet shops. For sizing real jobs, count on about 377 N of practical working push at 0.5 MPa instead of the headline 628 N. The piston magnet is fitted as standard, ready for CMSG, DMSG or EMSG position switches.
Airtac MAC Stainless Steel Mini Air Cylinder MAC40X70SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC40X70SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 70 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 MAC40X70SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×70 | 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 MAC40X70SU Is Used
PCB rail stopper
A pop-up stopper on an SMT board transfer rail uses the flat U mount for a straight-line block; 628 N at 0.5 MPa halts the carrier rail firmly and the cushion prevents board bounce at the stop.
Mold insert ejection
Ejecting cooled parts from small injection mold inserts needs steady straight push - the 70 mm stroke clears a 60 mm pocket and roughly 377 N of working force at 0.5 MPa breaks parts free without distortion.
Staking press head
A light benchtop staking station pressing pins into plastic connectors draws on the 880 N available at 0.7 MPa, with the stainless body tolerating the occasional coolant mist drifting over the fixture.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC40X70SU the Right Cylinder?
Step down to a 32 mm bore (402 N at 0.5 MPa) for lighter eject work, or up to the 50 mm bore (981 N) where dies or chutes demand more. The U cover suits fixed linear mounts; add FA flange or LB foot hardware, or swap to CA/CM covers for pivoting arms. An unpowered MAC offers no position holding - the rod slides under load when air drops - so fit a pilot check valve on held stations. This bore ports at 1/8" with an M12x1.25 rod thread; pressure 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s.
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 MAC40X70SU FAQ
At 0.5 MPa: 628 N push, 528 N pull. At 0.7 MPa: 880 N push, 739 N pull. Theoretical maximum 128 kgf at 1.0 MPa. Bore 40 mm, 16 mm rod with M12x1.25 male thread, 1/8" ports, 70 mm stroke, pressure 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s.
The rolled stainless tube with a hard-chrome plated carbon-steel rod shrugs off condensation, splash and mild washdown that rust painted-steel cylinders in food, outdoor or coolant-adjacent cells. Aluminium covers and the sealed rolling construction keep the body light without giving up the 628 N output.
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