
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X100-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø32mm bore and 100mm 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.
Trim the extend stroke by as much as 40 mm on site and the MACJ32X100-40S still holds its full force class: 402 N forward at 0.5 MPa against 345.6 N on retract, backed by a variable air cushion at both ends that soaks up end-of-stroke shock.
Its round body is a stainless tube rolled together with aluminium covers, so mild corrosion and periodic hose-down are non-events - a real edge over painted minis in bottling halls or outdoor cells. The magnet is inside every piston as standard, pairing directly with CMSG, DMSG and EMSG switches. Worked out for real duty, budget about 241 N of pushing effort at 0.5 MPa, which lifts a part of roughly 20 kg vertically at a 2:1 margin.
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X100-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø32 mm |
| Stroke | 100 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. |
| ×100 | 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.
Applies the closing stroke in a lab torque tester; cushioning at both ends keeps repeated cycles from jolting the transducer.
Lifts a wraparound label head clear between bottles; the 40 mm window absorbs bottle-height variants without a cylinder swap.
Swings a parts gate open in a riveting cell; the stainless barrel stands up to metal dust that abrades coated bores.
Bore 32 fills the gap between bore 25 (245.3 N push at 0.5 MPa) and bore 40 (628.3 N push at 0.5 MPa), so check both neighbours before committing. Note that the 40 mm window is a shorten-only adjuster - it holds position mechanically at end of stroke but does not brake the rod if air pressure drops. Match FA flange or LB foot mounts plus I and Y knuckles to your fixture, and the standard magnet means no special-order piston for switching.
Quick checklist
Push at 0.5 MPa is 402.2 N, pull at 0.5 MPa is 345.6 N, push at 0.7 MPa is 563.0 N and pull at 0.7 MPa is 483.8 N; theoretical maximum is 82 kgf at 1.0 MPa. Air supply is 0.15-1.0 MPa (22-145 psi) filtered to 40 um, with a 1.5 MPa (215 psi) proof pressure.
A magnet is built into the piston on every MA-series unit as standard, so CMSG, DMSG and EMSG reed or Hall switches clip onto the stainless barrel with no special piston order. The 40 mm adjustable window simply changes where the switch reads end of extend stroke.
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Covers non-human-caused product damage.
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