Airtac MAC Stainless Steel Mini Air Cylinder MAC20X320SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X320SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 320mm 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
- Stroke320 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 MAC20X320SU
Rolling-packed around a stainless-steel barrel, the MAC20X320SU pairs a hard-chrome plated rod with riveted aluminium covers, so the 320 mm body shrugs off the damp washdown mist that chews painted minis. It is double acting with a variable air cushion at both ends and runs 30-800 mm/s on 0.15-1.0 MPa (22-145 psi) filtered air.
At 0.5 MPa this 20 mm bore pushes 157 N and pulls 131.9 N; at 0.7 MPa push climbs to 219.8 N. Plan on roughly 94 N of usable work rather than the full 157 N rating. The U flat-end cover gives a clean fixed mounting face, and the built-in magnet picks up CMSG, DMSG or EMSG switches with no special-order piston.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X320SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X320SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 320 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 MAC20X320SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×320 | 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 MAC20X320SU Is Used
Tray eject on packaging lines
The 320 mm stroke and 157 N push slide loaded product trays off a conveyor stop plate, and the variable air cushion settles the tray gently at full extension.
Small parts lift station
With about 8 kg of vertical lift at a 2:1 margin, the cylinder raises test fixtures or small bins in an assembly cell without oversizing the bore.
Slide gate actuation
Flat-end U mounting bolts the body to a machine plate, driving a slide gate or hopper diverter across 320 mm of travel.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X320SU the Right Cylinder?
Size both ways: a 16 mm bore gives 100.5 N at 0.5 MPa, while a 25 mm bore reaches 245.3 N - step up if your work exceeds about 94 N. On a 320 mm stroke keep side loads low so the 8 mm rod does not bend. The flat-end U back cover bolts straight to plates; add FA flange or LB foot mounts if the frame needs them. Remember the plain MAC drifts when air is removed - fit a pilot check valve or rod lock if the load must stay put. The magnet is standard, so CMSG or DMSG switches drop on.
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 MAC20X320SU FAQ
At 0.5 MPa it pushes 157 N and pulls 131.9 N; at 0.7 MPa those rise to 219.8 N and 184.7 N. Theoretical maximum is 32 kgf at 1.0 MPa. Ports are 1/8 inch and the rod thread is M8x1.25 on this bore.
No. Every MAC cylinder carries a built-in magnet as standard, so CMSG, DMSG or EMSG reed switches snap onto the stainless barrel without ordering a special piston.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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