
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X150-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø32mm 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.
With a 32 mm bore and a 150 mm stroke, this MACJ pushes 402 N and pulls 346 N at 0.5 MPa, rising to 563 N and 484 N at 0.7 MPa. The -40 option adds a 40 mm window: an external stop screw shortens the extend stroke anywhere inside that range, while a variable air cushion at each end absorbs the final impact so you can push cycle speed instead of easing it.
The riveted body pairs a precision stainless barrel with a hard-chrome plated 12 mm rod and aluminium covers, an edge over painted minis in damp or washed-down corners. The magnet is built in as standard, so CMSG, DMSG or EMSG switches drop on without a special-order piston. From the force table, keep continuous loads to about 241 N at 0.5 MPa; for lifting, the full push force equates to roughly 41 kg, or about 20 kg once a 2:1 margin is applied.
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X150-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø32 mm |
| Stroke | 150 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | 484 N |
| Max (@1.0 MPa) | 82 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). |
|---|---|
| 32 | Bore size in mm. |
| ×150 | Stroke length in mm. |
| -40 | 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.
A 150 mm reach with a 40 mm trim window suits transfer units placing gearbox or pump housings between two stations, with the cushion softening each set-down.
346 N of holding pull and 402 N of clamping push at 0.5 MPa is enough for jig clamps on small milled parts, and the stop screw sets exact clamp position.
Use the adjustable extend stroke to eject finished blanks off shallow stamping dies, with the 40 mm window matched to different die heights.
Need less or more force? The 25 mm MACJ manages 245 N push at 0.5 MPa and the 40 mm bore reaches 628 N, so the 32 mm sits between them for mid-weight tooling. At 150 mm the stroke is standard for this bore, but support any overhanging end tooling with external guides to protect the rod. Note that the stop screw fixes a shorter extend position only: with air lost the piston can still drift, so it is not a mid-stroke lock. FA flange or LB foot mounting, I or Y rod knuckles, and the standard magnet for switch feedback complete the spec.
Quick checklist
At 0.5 MPa the bore pushes 402 N and pulls 346 N; at 0.7 MPa it is 563 N push and 484 N pull, with a theoretical maximum of 82 kgf at 1.0 MPa. The 150 mm stroke trims within a 40 mm window; supply 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, ports 1/8".
No. Every MACJ ships with the magnet built in, so AirTAC CMSG, DMSG and EMSG switches mount directly on the barrel for end-of-stroke or mid-position signal without a special-order piston.
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