Airtac MAC Stainless Steel Mini Air Cylinder MAC20X155SCA
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X155SCA 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 MAC20X155SCA
For linkages and swing arms that must articulate rather than bolt flat, the CA pivot back cover swings freely with the moving member - no extra clevis needed. The 20 mm bore is double acting: 157.0 N out and 131.9 N back at 0.5 MPa, rising to 219.8 N and 184.7 N at 0.7 MPa, and needle-adjustable air cushions at each end tame the stop even at high speed. Count on about 94 N of realistic push at 0.5 MPa, which lifts roughly 8 kg vertically with margin.
Its riveted stainless barrel and hard-chrome 8 mm rod stand up to condensation, coolant mist and outdoor weather that pit painted mini cylinders. A built-in magnet ships standard, so CMSG, DMSG or EMSG switches read position anywhere along the 155 mm travel, and the whole cylinder runs happily at 30-800 mm/s on air filtered to 40 um.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X155SCA Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X155SCA |
|---|---|
| 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 MAC20X155SCA
| 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 MAC20X155SCA Is Used
Diverter flap actuator
Swings a sorting flap to kick small cartons onto a spur lane where a distribution conveyor splits.
Welding fixture swing clamp
Articulates with a clamp arm that locks thin tube joints into a small welding jig before the torch passes.
Dosing hopper gate
Pivots the slide gate of a minor-ingredient dosing hopper open and closed on a food batching line.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X155SCA the Right Cylinder?
Lighter duty drops to a 16 mm bore at 100.5 N; heavier work steps up to 245.3 N on the 25 mm bore. Supply 0.15-1.0 MPa (22-145 psi) through the 1/8 inch ports. Bear in mind a plain MAC will not park the rod if the valve centres or the air fails - it simply coasts, so add a rod lock or pilot check valve for suspended loads. Combine the CA pivot with an SDB pivot bracket for a two-point swinging mount, and shield the 8 mm rod from lateral forces across the 155 mm stroke.
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 MAC20X155SCA FAQ
With 0.5 MPa you get 157.0 N forward and 131.9 N back; at 0.7 MPa, 219.8 N forward and 184.7 N back. The theoretical ceiling for this bore is about 32 kgf at 1.0 MPa.
A needle screw at each end meters the cushion air. On first start-up back both screws off, then close them gradually until the load stops cleanly; the cylinder accepts speeds from 30 to 800 mm/s throughout.
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