Airtac MAC Stainless Steel Mini Air Cylinder MAC20X275SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X275SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 275mm 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
- Stroke275 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 MAC20X275SU
Fixed, flush mounting comes naturally to the MAC20X275SU, whose U flat-end back cover bolts flat against a machine face while the rod travels 275 mm. Push force at 0.5 MPa is 157 N and pull 131.9 N; at 0.7 MPa expect 219.8 N forward. This is a double-acting cushioned cylinder - air retracts as well as extends - with needle-adjustable cushions at both ends running 30-800 mm/s on 0.15-1.0 MPa (22-145 psi).
The barrel is precision stainless steel rolled against aluminium covers, paired with a hard-chrome 8 mm rod that tolerates splash, humidity and light washdown. A magnet sits in the piston as standard, so CMSG / DMSG / EMSG switches drop straight on for position feedback. Match it to part weight rather than raw force: a 2:1 margin lets it raise roughly 8 kg vertically, and keeping the real workload near 94 N at 0.5 MPa stretches seal life.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X275SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X275SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 275 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 MAC20X275SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×275 | 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 MAC20X275SU Is Used
Slide bolt on a crate-nailing jig
Clamps the crate against the jig fence with a 275 mm bolt stroke; the U cover bolts flat to the jig rail and 157 N at 0.5 MPa holds the boards square under the nailer.
Metering-valve pusher on a water treatment skid
Strokes a pilot valve lever through 275 mm of travel; the stainless barrel and chrome rod stand up to the humid, splashed atmosphere around dosing skids.
Cap-press head on a bench capper
Presses caps home on bottles as the head descends; the flat U back cover mounts directly to the head plate, and a 2:1 margin covers roughly 8 kg of vertical lift.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X275SU the Right Cylinder?
Forces sit between bores: the 16 mm version manages 100.5 N push at 0.5 MPa while the 25 mm reaches 245.3 N, so this 20 mm unit owns the middle ground at 157 N. It will not lock itself - expect drift whenever supply pressure drops - so a rod lock or pilot check valve protects any held load. Long 275 mm travel makes side load the enemy of the 8 mm rod; use external guides and match the frame with FA flange, LB foot or SDB brackets, plus I or Y rod knuckles.
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 MAC20X275SU FAQ
At 0.5 MPa: 157 N out and 131.9 N back. At 0.7 MPa: 219.8 N out and 184.7 N back. Maximum theoretical force is 32 kgf at 1.0 MPa. Ports are 1/8" and the rod thread is M8x1.25; operate on 0.15-1.0 MPa (22-145 psi) of 40 um filtered air at 30-800 mm/s.
It cannot. The MAC20X275SU is double acting with nothing to block internal flow, so when supply pressure fails or the valve centres, the piston drifts with the load. The cushions only soften the last part of the stroke - for a held position, fit a rod lock or a pilot check valve in the lines.
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