Airtac MAC Stainless Steel Mini Air Cylinder MAC20X400SCM
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X400SCM is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm 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.
- BoreØ20 mm
- Stroke400 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 MAC20X400SCM
Position feedback comes free here: every MAC20X400SCM ships with the magnet built into the piston, so CMSG, DMSG or EMSG reed switches bolt straight onto the barrel without a special-order cylinder. The double-acting piston also carries a variable air cushion at each end to soften the 400 mm travel.
The bore 20 stainless body pushes 157 N at 0.5 MPa and 219.8 N at 0.7 MPa, pulling 131.9 N at the lower pressure. Count on about 94 N of dependable push at 0.5 MPa, near enough to raise an 8 kg part vertically with a 2:1 margin. Proof pressure is rated at 1.5 MPa (215 psi).
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X400SCM Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X400SCM |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 400 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 MAC20X400SCM
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | 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 MAC20X400SCM Is Used
Positioned slide on test rig
Feeds a small fixture into a leak-test station and reports both end positions via bolt-on CMSG switches; the standard magnet makes the feedback wiring trivial.
Reject push-off
Tips off-spec bottles from a filling line lane; 94 N of practical push at 0.5 MPa is ample for empty PET bottles, and twin cushions stop the paddle softly.
Lid-lowering press
Presses snap-on lids onto about 8 kg containers over a 400 mm descent, the height the rod lifts vertically within a 2:1 margin at 0.5 MPa.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X400SCM the Right Cylinder?
If under 100 N at 0.5 MPa suffices, bore 16 (100.5 N) costs less air; beyond 245 N, move to bore 25 (245.3 N) in the same family. Since air loss leaves the piston free to drift, add a rod lock or check valve where a mid-stroke position must persist. The CM round-end cover accepts a pivot pin without adapters, and the standard magnet pairs with CMSG, DMSG or EMSG switches. Long strokes like 400 mm punish side load, so guide the payload separately.
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 MAC20X400SCM FAQ
Push is 157.0 N and pull 131.9 N at 0.5 MPa; at 0.7 MPa push climbs to 219.8 N and pull to 184.7 N, with about 32 kgf theoretical peak at 1.0 MPa. Fluid ports are 1/8 inch, the rod thread is M8x1.25, and the 400 mm stroke is a standard offering up to 500 mm for this bore.
Yes. The variable cushioning at both stroke ends is set by needle screws; start with them backed off, run the cylinder slowly, then open the restriction gradually until end-of-stroke impact disappears. Air must be filtered to 40 um, and the proof pressure is 1.5 MPa (215 psi).
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