
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ16X80-20S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø16mm bore and 80mm stroke, M5×0.8 air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
Small machines gain a flexible actuator in the MAJ16X80-20S: 80 mm of double-acting travel with a 20 mm field-trimmable extend stroke, plus fixed anti-impact pads that soften arrival at both ends. AirTAC's MA construction rolls aluminium covers onto a stainless-steel barrel around a 20 um hard-chrome rod, so the riveted body stays sealed and compact.
At 0.5 MPa expect 100.5 N on extend and 86.4 N on retract; about 60 N of that is a sensible continuous workload, enough to shift or lift roughly 5 kg parts with a 2:1 margin. Standard M5x0.8 ports feed 0.15-1.0 MPa (22-145 psi) air, speeds run 30-800 mm/s, and the standard magnet accepts CMSG, DMSG and EMSG switches out of the box.
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ16X80-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø16 mm |
| Stroke | 80 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | M5×0.8 |
| Rod thread | M6×1.0 |
| 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 | Fixed anti-impact bumper pads |
| Max standard stroke | Up to 300 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 101 N | 86 N |
| 0.7 MPa | 141 N | 121 N |
| Max (@1.0 MPa) | 21 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 16 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -20 | Adjustable stroke window (mm the extend stroke can be shortened on site). |
| -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.
Ejecting a circuit board from a test fixture, where the 20 mm trim handles fixture height changes between board types.
Tamping a small flap on a carton coder or inkjet line, with the bumper pads quieting each cycle at stroke end.
Actuating a sliding latch or interlock door on a machine guard, where a light 60 N class push is all that is needed.
If 100.5 N at 0.5 MPa is marginal, the next bores up offer 157.0 N (bore 20) and 245.3 N (bore 25) at the same pressure - useful checks before committing to this 16 mm frame. The 20 mm trim window allows occasional product changeovers without re-plumbing. Treat the stop screw purely as an extend-stroke limit; it will not hold a load if air pressure drops. Mount with FA flange or LB foot, add I or Y knuckles as needed, and rely on the built-in magnet with CMSG / DMSG / EMSG switches for position feedback.
Quick checklist
At 0.5 MPa: 100.5 N push, 86.4 N pull. At 0.7 MPa: 140.7 N push, 120.9 N pull. Theoretical peak is 20.5 kgf at 1.0 MPa. Ports are M5x0.8 on the covers; the rod thread is M6x1.0 and the rod is 6 mm hard-chrome steel.
Choose FA flange or LB foot mounting, with I or Y rod knuckles for linkages; the adjustable-stroke version has no SDB or back-cover options. The riveted stainless round body takes 0.15-1.0 MPa (22-145 psi) air at 30-800 mm/s, and the standard magnet works with CMSG / DMSG / EMSG switches.
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