Airtac MAC Stainless Steel Mini Air Cylinder MAC20X550SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X550SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 550mm 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
- Stroke550 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 MAC20X550SU
For fixed mounting against a machine plate, the U flat-end back cover on the MAC20X550SU needs no pivot hardware - bolt it flat and the 550 mm stroke does the reaching. This 20 mm bore unit is double acting with a variable air cushion at both ends, delivering 157 N of push and 131.9 N of pull at 0.5 MPa. In round numbers, plan on roughly 94 N of usable push force (about 60 percent of rating) so seals and cushions keep their service life.
The riveted stainless barrel and hard-chrome plated rod shrug off condensation, cutting fluid mist and outdoor exposure better than painted mini cylinders. Every unit carries a built-in magnet for CMSG, DMSG and EMSG switches. Because 550 mm is past the 500 mm standard maximum for this bore, it is produced as a special stroke on request.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X550SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X550SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 550 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 MAC20X550SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×550 | 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 MAC20X550SU Is Used
Tray stacker on a thermoformer line
Pushes stacked trays up a 550 mm guide column; the U flat-end cover bolts straight to the machine frame without adapter plates.
Lane divider on a roller conveyor
Swings a divider into a flowing lane of totes; 157 N at 0.5 MPa moves lightweight totes and the cushion damps the park position.
Sampling arm on a water-test rig
Extends a sample bottle 550 mm into a test channel; the stainless body tolerates splash and an EMSG switch signals full extension.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X550SU the Right Cylinder?
Force ladder at 0.5 MPa: 100.5 N for the 16 mm bore, 157 N here, 245.3 N at 25 mm - choose by the margin you need, not the rating alone. The cushion is not a brake; with air removed or the valve centred the rod will drift, so specify a rod lock or pilot check where the load must hold. LB foot or FA flange brackets plus the U flat-end cover give a rigid fixed mount. At this stroke length, keep side load away from the rod and guide the payload on its own linear bearings.
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 MAC20X550SU FAQ
Push is 157 N and pull 131.9 N at 0.5 MPa; push climbs to 219.8 N at 0.7 MPa, and theoretical maximum output is about 32 kgf at 1.0 MPa. Ports are 1/8", rod diameter 8 mm, rod thread M8x1.25 male. Pressure range is 0.15-1.0 MPa (22-145 psi).
Yes - the magnet is built in as standard, not an option, so CMSG, DMSG and EMSG switches attach to the barrel out of the box. That makes end-of-stroke confirmation cheap even on the 550 mm made-to-order stroke, with cushioning effective across the 30-800 mm/s speed range.
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