Airtac MAC Stainless Steel Mini Air Cylinder MAC20X400SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X400SU 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 MAC20X400SU
With a flat U back cover bolted to a fixed plate, the MAC20X400SU needs no extra bracket to sit square on a machine frame. Inside, air works the piston both directions and twin variable cushions tame the end of its 400 mm stroke; the riveted stainless barrel resists corrosion without paint.
This bore 20 class delivers 157 N push at 0.5 MPa against 131.9 N on retract. Working to about 94 N of push, the rod can raise roughly 8 kg vertically with a 2:1 margin, and at 0.7 MPa the push climbs to 219.8 N. Pressure window: 0.15-1.0 MPa (22-145 psi).
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X400SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X400SU |
|---|---|
| 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 MAC20X400SU
| 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 MAC20X400SU Is Used
Fixed-slide actuator
Bolts flush behind a machine plate to drive a small linear slide; the flat U cover seats on the frame without brackets, keeping the 400 mm stroke true.
Bin-fill gate
Opens a gravity chute gate above a picking bin; the stainless barrel survives dusty, occasionally washed storage areas, and cushioning keeps the gate from slamming.
Spray booth door slide
Slides a lightweight booth window open for part loading; air loss leaves the door free, so plan a check valve if it must park mid-travel.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X400SU the Right Cylinder?
Size down to the bore 16 version (100.5 N push at 0.5 MPa) for smaller loads or up to bore 25 (245.3 N) when you need the next force class; all share the stainless mini build. Nothing locks the rod when pressure is lost, so a pilot check valve or rod lock is the answer for loads that must not sag. The U flat-end cover bolts flush to fixed plates, while FA flange and LB foot mounts and I/Y knuckles cover other arrangements. Keep external guiding on a 400 mm stroke to spare the chrome rod.
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 MAC20X400SU FAQ
At 0.5 MPa it pushes 157.0 N and pulls 131.9 N; at 0.7 MPa those become 219.8 N push and 184.7 N pull, with a theoretical peak near 32 kgf at 1.0 MPa. Ports are 1/8 inch regardless of the U cover, the rod thread is M8x1.25, and 400 mm remains inside the 500 mm standard stroke range.
It can. The U back cover bolts directly to fixed plates, while FA flange, LB foot or SDB pivot brackets and I or Y rod knuckles adapt the same cylinder to pivoting or flanged frames. The built-in magnet and variable twin cushions carry over unchanged.
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Covers non-human-caused product damage.
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