Airtac MAC Stainless Steel Mini Air Cylinder MAC20X120SCM
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X120SCM is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 120mm 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
- Stroke120 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 MAC20X120SCM
Pick the CM round-end back cover when the cylinder bolts flush to a flat machine face and no extra bracket is wanted. Double acting with a variable air cushion at both ends, this 20 mm bore pushes 157.0 N at 0.5 MPa over 120 mm of stroke, climbing to 219.8 N at 0.7 MPa.
Instead of a painted body, the stainless round barrel is rolled onto aluminium covers around a hard-chrome 8 mm rod, a real edge in damp food-plant and outdoor air. Derating the 157 N push leaves about 94 N of working force at 0.5 MPa once margin is allowed, and the standard piston magnet accepts CMSG / DMSG / EMSG switches straight from stock.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X120SCM Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X120SCM |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 120 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 MAC20X120SCM
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×120 | 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 MAC20X120SCM Is Used
Clamping housings in a drill jig
About 94 N of derated force at 0.5 MPa holds an aluminium casting against the stop while a 6 mm hole is drilled, with the cushion absorbing clamp-in.
Label-head retract confirmation
A CMSG switch on the standard magnet tells the PLC the head has fully withdrawn before the next carton feeds, cutting jam-stops on the line.
Wire-forming tension arm
The round-end cover anchors the cylinder to the machine face while a guided arm rides the wire; 131.9 N of pull at 0.5 MPa trims slack smoothly.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X120SCM the Right Cylinder?
This 20 mm bore sits between 16 mm (100.5 N push at 0.5 MPa) and 25 mm (245.3 N), so check the band before committing. The round-end cover bolts directly to flat machine faces through its end holes. If a valve centres mid-stroke or supply fails, nothing stops the rod - plan a rod lock or pilot check valve for any held load. The piston magnet is standard, so CMSG / DMSG / EMSG sensing needs no special piston, and FA flange or LB foot brackets remain options on the same barrel.
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 MAC20X120SCM FAQ
Push is 157.0 N and pull 131.9 N at 0.5 MPa. At 0.7 MPa expect 219.8 N push and 184.7 N pull. Theoretical ceiling is 32.0 kgf at 1.0 MPa. The bore uses 1/8" ports, the 8 mm rod takes an M8x1.25 thread, and 120 mm sits well inside the 500 mm standard stroke for this bore.
No. Every MAC cylinder carries a piston magnet as standard, so CMSG, DMSG or EMSG switches mount on the stainless barrel without ordering a special piston. That makes it easy to confirm extend and retract across the full 120 mm stroke.
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