Airtac MAC Stainless Steel Mini Air Cylinder MAC20X55SCA
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X55SCA is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 55mm 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
- Stroke55 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 MAC20X55SCA
Short and pivot-ready, the MAC20X55SCA covers quick 55 mm moves with a 20 mm bore that pushes 157 N and pulls 131.9 N at 0.5 MPa. It is double acting with a variable air cushion at each end, so even 800 mm/s cycling lands soft on the covers. Read it as a cylinder that lifts about 8 kg vertically with a 2:1 safety margin - the raw 0.5 MPa equivalent is 16 kg.
A hard-chrome plated carbon-steel rod runs in a stainless barrel riveted to aluminium covers, a combination that outlasts painted minis where coolant mist or humidity is present. The magnet comes fitted as standard, so CMSG, DMSG or EMSG switches mount without ordering a special piston. The CA pivot back cover swings on a pin, or add FA flange, LB foot and SDB pivot brackets for fixed anchoring.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X55SCA Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X55SCA |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 55 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 MAC20X55SCA
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×55 | 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 MAC20X55SCA Is Used
Small-part ejector on an insert-molding press
Kicks molded inserts out of a shallow nest within 55 mm; the CA pivot cover lets the rod follow a slight linkage arc.
Divert valve on a filling manifold
Cycles a compact divert valve on a filling head; the stainless barrel wipes down easily between product changeovers.
Presence-check probe in a robot cell
Darts a probe 55 mm in to confirm a clip is seated; a DMSG switch reports the extended position straight to the PLC.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X55SCA the Right Cylinder?
Against its neighbours at 0.5 MPa, the 16 mm bore offers 100.5 N and the 25 mm bore 245.3 N; this 20 mm unit lands at 157 N. Note that neither the cushion nor anything else in a plain double-acting cylinder holds position once air is lost - the piston drifts, so use a rod lock or pilot check valve for suspended loads. The 55 mm stroke is well inside the 500 mm standard range, so no made-to-order build is needed. Keep the short stroke aligned square to the load to avoid rod side load.
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 MAC20X55SCA FAQ
At 0.5 MPa the push is 157 N and the pull 131.9 N; at 0.7 MPa push reaches 219.8 N. The theoretical maximum for the 20 mm bore is about 32 kgf at 1.0 MPa. Port size is 1/8" and the 8 mm rod carries an M8x1.25 male thread.
Back both cushion needle screws fully off, run the cylinder slowly, then close them gradually until end-of-stroke impact disappears. The variable cushion works independently at each end and is effective across the 30-800 mm/s speed range; pressure range is 0.15-1.0 MPa (22-145 psi).
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Covers non-human-caused product damage.
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