Airtac MAC Stainless Steel Mini Air Cylinder MAC20X420SCA
The AirTAC Airtac MAC Stainless Steel Mini Air Cylinder MAC20X420SCA is a genuine double acting + cushion standard round-body mini air cylinder with a Ø20mm bore and 420mm 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
- Stroke420 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 MAC20X420SCA
Where short minis run out of travel, the MAC20X420SCA stretches to 420 mm on the same compact 20 mm bore - still within the 500 mm standard stroke limit for this size, so it ships as a catalogue item. Double acting with a variable cushion at both ends, it develops 157 N push and 131.9 N pull at 0.5 MPa.
Long strokes expose side loads, so guide the load on external rails or a bushing rather than letting the rod carry lateral force. The CA pivot back cover suits a long linkage arm or lever, and the stainless barrel with its hard-chrome rod keeps corrosion in check even with the rod fully exposed for most of the cycle. For planning, count on about 94 N of real work at 0.5 MPa - the 60 percent figure that leaves headroom in the rating.
Airtac MAC Stainless Steel Mini Air Cylinder MAC20X420SCA Technical Specifications
| Model | Airtac MAC Stainless Steel Mini Air Cylinder MAC20X420SCA |
|---|---|
| Series | MAC mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 420 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 MAC20X420SCA
| MAC | Standard round-body mini cylinder (double-acting, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×420 | 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 MAC20X420SCA Is Used
Long-reach lid opener
Swings a long lever arm to open machine guards across a wide arc, pivoting directly on the CA rear cover.
Cross-conveyor kicker
Kicks product across a wide belt between two narrow conveyors, with external guides holding the long rod straight at speed.
Rack locating pin
Pushes a locating pin into rack slots on an ASRS shuttle, with DMSG switches confirming full extension 420 mm out.
Is the Airtac MAC Stainless Steel Mini Air Cylinder MAC20X420SCA the Right Cylinder?
For lighter duty the 16 mm MAC gives 100.5 N at 0.5 MPa; for more muscle the 25 mm MAC delivers 245.3 N. A 420 mm rod moving at up to 800 mm/s magnifies any misalignment, so add external guides and keep the thrust axis true to limit rod bending. When the valve is de-energised the piston simply coasts to wherever the load takes it - a pilot check valve or rod lock keeps it parked. SDB pivot bracket, FA flange and LB foot mounts all catalogue for this bore, with 1/8" ports at each end.
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 MAC20X420SCA 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 kgf theoretical maximum at 1.0 MPa. Pressure range 0.15-1.0 MPa (22-145 psi), proof 1.5 MPa (215 psi), speed 30-800 mm/s.
No - with air removed or the valve centred, the piston drifts wherever the load pushes it, and the end cushions are no brake. For a held or vertical load, fit a rod lock or a pilot check valve in the line so the rod stays where you left it.
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