Airtac MAC Stainless Steel Mini Air Cylinder MAC20X265SU
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X265SU is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 265mm 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
- Stroke265 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 MAC20X265SU
Two hundred sixty-five millimetres of travel on a cushioned 20 mm body makes the MAC20X265SU a natural for gates, pushers and ejectors needing that extra reach. The riveted stainless barrel resists corrosion in washdown zones, and the hard-chrome plated 8 mm rod keeps friction low over the full travel. Double-acting air power plus variable cushions at both ends keep the cycle smooth from 30 to 800 mm/s.
Push force is 157 N and pull 131.9 N at 0.5 MPa; step the supply to 0.7 MPa and push reaches 219.8 N. Working to roughly 94 N leaves headroom, and the same figure translates to about 8 kg of vertical lift at a 2:1 margin. The magnet is standard fitment, so CMSG, DMSG or EMSG switches report end positions without modification.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X265SU Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X265SU |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 265 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 MAC20X265SU
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×265 | 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 MAC20X265SU Is Used
Press-bench bracket ejector
Ejects stamped brackets upward off a press die; 265 mm clears tall nests and the top cushion quiets the return bounce.
Parcel lane diverter
Swings a diverter blade across a parcel sorter lane; the long stroke covers the full lane width and 157 N push at 0.5 MPa deflects boxes within the 94 N working band.
Paint-booth door slide
Slides a paint-booth access door; the stainless barrel and chrome rod resist solvent-laden air, and the magnet-driven DMSG switch interlocks the spray pump.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X265SU the Right Cylinder?
Sizing ladder at 0.5 MPa push: 100.5 N for bore 16, 157 N here on bore 20, and 245.3 N from bore 25. The piston floats when the valve centres or supply fails - mount a rod lock or pilot check valve if the load has to hang. FA flange, LB foot and SDB pivot brackets, plus CA, U or CM rear covers, let one body fit almost any frame. At 265 mm, run the load on guides or a dual rail so the 8 mm rod never sees 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 MAC20X265SU FAQ
Push 157 N and pull 131.9 N at 0.5 MPa; push 219.8 N and pull 184.7 N at 0.7 MPa; 32.0 kgf theoretical at 1.0 MPa. Operating window 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-800 mm/s, 1/8" ports, M8x1.25 rod thread, 265 mm stroke on a 20 mm bore.
Guide the load externally so side loads stay off the 8 mm hard-chrome rod, which can bend if pushed sideways at full extension. Back the cushion needle screws off on first run-up and open them gradually, and mount with the FA flange, LB foot or SDB pivot bracket to suit the frame.
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