Airtac MAC Stainless Steel Mini Air Cylinder MAC20X145SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X145SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 145mm 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
- Stroke145 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 MAC20X145SU
The MAC20X145SU stretches AirTAC's stainless mini cylinder format to 145 mm of travel on a 20 mm bore, staying double acting throughout with a variable air cushion guarding both ends. Rated figures are 157 N push and 131.9 N pull at 0.5 MPa, climbing to 219.8 N at 0.7 MPa, with a theoretical ceiling of 32 kgf at 1.0 MPa. The 145 mm rod travel is long relative to the body, so plan guides or a steady bracket if side loads exist.
The stainless barrel and hard-chrome plated 20 um rod are the argument here: unlike painted or bare-aluminium minis, they tolerate rinse-down, humidity and outdoor dust without flaking. A practical sizing habit is to spend only 94 N - 60 percent of the 157 N push rating - and keep the rest as margin. The U flat-end back cover gives a clean fixed mounting face, and the standard magnet accepts CMSG, DMSG or EMSG switches out of the box.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X145SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X145SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 145 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 MAC20X145SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×145 | 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 MAC20X145SU Is Used
Nesting stop on a machining bench
Positions and stops bar stock in a bench-top cut-off station; 145 mm of travel gives room to clear the saw swing between parts.
Level probe lift
Lowers a level probe into a mixing vat between readings; the stainless barrel shrugs off the humid, rinse-prone conditions around the vessel.
Tote batching door
Sequences totes from a gravity lane into a picking station by opening a light counterweighted door at full cycle speed.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X145SU the Right Cylinder?
Sandwich the choice: bore 16 at 100.5 N push and bore 25 at 245.3 N (both at 0.5 MPa) bracket this 20 mm unit's 157 N, so size down when force is spare and up when it is not. Long strokes like 145 mm reward attention to rod alignment - misalignment multiplies side load and shortens seal life.
The standard magnet means CMSG, DMSG and EMSG switch points can be set anywhere along the stroke. Operating window is 0.15-1.0 MPa (22-145 psi) with proof pressure at 1.5 MPa (215 psi).
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 MAC20X145SU FAQ
At 0.5 MPa it pushes 157 N and pulls 131.9 N; at 0.7 MPa, 219.8 N push and 184.7 N pull; theoretical maximum 32 kgf at 1.0 MPa. The stroke is 145 mm, under the 500 mm standard limit, on 1/8" ports with an 8 mm hard-chrome plated rod.
No. A double-acting MAC cylinder has no spring, brake or lock inside, so a centred valve or lost supply lets the piston drift under gravity or load. If the fixture must stay clamped, add a rod-lock cylinder or a pilot check valve on the ports.
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