
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X150-100S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø20mm bore and 150mm 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.
Long travel with generous on-site tuning: this MACJ pairs a 150 mm extend stroke with a 100 mm adjustable window, so one cylinder can be re-trimmed across most of its travel as line layouts change, and it stays double-acting with a variable cushion at each end. The 20 mm bore pushes 157 N at 0.5 MPa; treat about 94 N as the realistic working force when you add up tray weight plus friction.
Over a span this long, the build matters: the stainless-steel round barrel resists corrosion along its full length, and the hard-chrome plated rod keeps the long seal path wearing evenly. The 8 mm rod is sized for thrust, not side load, so guide long or overhanging parts externally. A magnet is fitted as standard for CMSG / DMSG / ESG switch position checks - sorry, EMSG - fitted as standard for CMSG / DMSG / EMSG position checks along the tube.
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ20X150-100S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 150 mm |
| Acting type | Double acting, adjustable stroke + 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 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 | 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.
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×150 | Stroke length in mm. |
| -100 | 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.
The full 150 mm reach pushes empty trays across the gap into a filling nest; the 100 mm window absorbs later guard or guide revisions without swapping the cylinder, with 94 N-class practical force at 0.5 MPa.
Raising a light hopper lid for cleaning is a textbook 8 kg-class vertical job at this bore; cushioned parking keeps the lid from slamming at the top of travel.
A paddle kicks small cartons across a merging gap at up to 800 mm/s; the stainless tube stands up to damp corridor air near wash areas, and the standard magnet signals kick completion.
Bore 16 covers lighter pushes at 100.5 N (0.5 MPa), while bore 25 raises capacity to 245.3 N for stickier slides. At 150 mm stroke, side loads are the usual killer - add an external guide rather than letting the 8 mm rod carry them. The trim stop defines only where extension finishes and offers no holding against air loss. Choose FA flange or LB foot to suit the frame, and run 30-800 mm/s with the cushions set for the load.
Quick checklist
Push is 157 N and pull 131.9 N at 0.5 MPa; at 0.7 MPa those become 219.8 N and 184.7 N. Theoretical maximum output is 32.0 kgf at 1.0 MPa. Supply pressure spans 0.15-1.0 MPa (22-145 psi), proof pressure is 1.5 MPa (215 psi), and the standard stroke ceiling for bore 20 is 300 mm, so 150 mm is well within range.
Use the FA flange for face mounting or the LB foot for base mounting, and keep speed between 30 and 800 mm/s with the end cushions tuned to the load. Every MA-series cylinder ships with a built-in magnet, so CMSG, DMSG or EMSG reed/electronic switches simply snap onto the stainless tube at your retracted and extended check points.
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