Airtac MAC Stainless Steel Mini Air Cylinder MAC20X155SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X155SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 155mm 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
- Stroke155 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 MAC20X155SU
Behind the hard-chrome plated 8 mm rod sits a rolled, riveted stainless-steel barrel with aluminium covers, so this 155 mm stroke MAC resists the corrosion that wrecks painted mini cylinders in wet or outdoor corners. Double acting on a 20 mm bore, it delivers 157.0 N forward and 131.9 N on the return at 0.5 MPa, and 219.8 N with 184.7 N at 0.7 MPa. Budget about 94 N as the honest working force at 0.5 MPa - enough to raise roughly 8 kg against gravity with margin.
Variable air cushions at both ends, set by needle screws, let the rod coast at up to 800 mm/s yet land without metal-to-metal slam. The U back cover offers a flat rear face for direct frame fixing, and because the magnet is standard equipment, CMSG, DMSG or EMSG switches can be parked anywhere along the travel.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X155SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X155SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 155 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 MAC20X155SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×155 | 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 MAC20X155SU Is Used
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Pushes finished pill trays out of their forming nests on a small thermoformer so the next cycle can load.
Connector crimp assist
Drives the ram of a bench-top fixture that presses terminals onto cable ends in low-volume assembly.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X155SU the Right Cylinder?
Below 157 N, a 16 mm bore does the job with 100.5 N; above it, a 25 mm bore gives 245.3 N at 0.5 MPa. Feed it 0.15-1.0 MPa (22-145 psi) via the 1/8 inch ports, and use the male M8x1.25 rod thread for tooling attachment. The rod is free to move when the valve sits in neutral or air is lost, so a pilot check valve or rod lock is the answer for held positions. If the flat U rear face does not suit the frame, add an FA flange or LB foot; the standard magnet covers all CMSG, DMSG and EMSG sensing. On a 155 mm stroke, guide any off-axis load externally to protect the 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 MAC20X155SU FAQ
At 0.5 MPa, 157.0 N on the extend stroke and 131.9 N retracting; at 0.7 MPa, 219.8 N and 184.7 N respectively. Theoretically the bore reaches about 32 kgf at 1.0 MPa.
The stainless barrel is rolled into aluminium covers and the 8 mm rod carries a hard-chrome layer of about 20 um, so coolant mist, condensation and rain cause little trouble. It operates from -20 to +70 C on air filtered to 40 um.
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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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