Airtac MAC Stainless Steel Mini Air Cylinder MAC20X40SCA
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X40SCA is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 40mm 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.
- BoreØ20 mm
- Stroke40 mm
- Port size1/8"
- Acting typeDouble acting + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X40SCA
A round-body mini cylinder with a riveted stainless barrel and a hard-chrome plated carbon-steel rod, the MAC20X40SCA is double acting with a variable air cushion at both ends. At 0.5 MPa it pushes 157 N and pulls 131.9 N; at 0.7 MPa the push climbs to 219.8 N. The CA pivot back cover carries its pivot point in the cover casting itself, so a clevis-style linkage bolts on without extra hardware.
Plan on roughly 94 N of honest working force at 0.5 MPa - about 60 percent of the 157 N rating - and it lifts about 8 kg vertically once a 2:1 margin is applied. The magnet ships inside the piston as standard, so CMSG, DMSG or EMSG switches clamp straight on for end-of-stroke signals. In splashy washdown corners the stainless tube resists rust far better than a painted-steel mini, and the cushion needle screws let you soften landings at cycle speeds up to 800 mm/s.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X40SCA Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X40SCA |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 mm |
| Acting type | Double acting + cushion |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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 MAC20X40SCA
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 MAC20X40SCA Is Used
Toggle clamp actuator
Drives a small toggle or cam clamp on a drilling fixture; 157 N at 0.5 MPa seats thin aluminium plates while the 40 mm stroke clears part loading.
Carton divert pusher
Swings a lightweight pusher arm on a packaging conveyor to shunt small cartons off the main lane at up to 800 mm/s.
Sample rack lifter
Raises an 8 kg sample rack in a lab autosampler, with the cushion easing the descent and CMSG switches confirming top and bottom.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X40SCA the Right Cylinder?
Step down to the 16 mm MAC when 100.5 N at 0.5 MPa covers the job, or up to the 25 mm MAC at 245.3 N for heavier clamping - size by load, not habit. The rod drifts if air is lost or the valve centres, so fit a rod lock or pilot check valve wherever a load must stay put. The CA pivot pairs naturally with an SDB pivot bracket or Y rod knuckle; FA flange and LB foot are also catalogue options. Bore 20 ports are 1/8" and 40 mm sits well inside the 500 mm standard stroke for this bore.
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 MAC20X40SCA FAQ
At 0.5 MPa it pushes 157 N and pulls 131.9 N; at 0.7 MPa, 219.8 N push and 184.7 N pull. Theoretical maximum is 32 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), and speed range 30-800 mm/s.
The pivot is built into the rear cover, so linkage arms and lever joints attach directly without a separate clevis. If you later need a fixed mount, FA flange, LB foot or SDB pivot brackets and I or Y rod knuckles all suit this 20 mm bore.
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