Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X40-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X40-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø32mm bore and 40mm 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.
- BoreØ32 mm
- Stroke40 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM10×1.25
- CushionVariable air cushion, both ends
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X40-20S
When the extend stroke has to be set on the machine rather than at the factory, MACJ32X40-20S gives a 20 mm window to play with. It is a double-acting, round-body mini cylinder with variable air cushioning at each end; at 0.5 MPa the bore pushes 402.2 N and retracts with 345.6 N.
Dial the cushion to match the load and you can run near the 800 mm/s top speed without hammering the aluminium covers. On the lifting side, the 402.2 N push is roughly 41 kgf, so with a 2:1 margin it will hoist about 20 kg vertically - a handy check against the weight of your fixture. The stainless barrel and hard-chrome rod also keep corrosion at bay in coolant-heavy cells.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X40-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X40-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø32 mm |
| Stroke | 40 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.
Theoretical Output Force (Ø32mm)
| 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.
Model Code: Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X40-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 32 | Bore size in mm. |
| ×40 | 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.
Where the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X40-20S Is Used
Conveyor stopper gate
Trims the stop position across a 20 mm adjustment range so pallets line up with the pick head on an assembly conveyor.
Dot-peen marking punch
Stamps batch codes on brackets; 563.0 N at 0.7 MPa gives a crisp mark while the rear cushion quiets the return stroke.
Case flap tucker
Folds the final flap on a cartoning machine, with the magnet switch confirming full retraction before the sealing head drops.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X40-20S the Right Cylinder?
Compare across the range before committing: bore 25 yields 245.3 N at 0.5 MPa, bore 40 gives 628.3 N, and this 32 mm bore lands between them. Note that the adjuster shortens the stroke only; it cannot extend travel past 40 mm, and it is not a mid-stroke lock, so a dropped air supply lets the piston settle. The standard magnet feeds position signals to CMSG, DMSG or EMSG switches, and mounting choices are FA flange, LB foot, plus I and Y knuckles on the 1/8" ports.
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 MACJ Stainless Steel Mini Adjustable Cylinder MACJ32X40-20S FAQ
Push at 0.5 MPa is 402.2 N against a 345.6 N pull. Supply 0.7 MPa and you get 563.0 N forward and 483.8 N back, with 82 kgf available at the 1.0 MPa theoretical limit. Keep air filtered to 40 um and inside 0.15-1.0 MPa (22-145 psi).
A stop screw limits extension to any position within the ordered 20 mm window, so one cylinder serves several product sizes. It shortens travel only and acts as a mechanical stop, not a brake - on air loss the piston drifts, so never rely on it to hold a load.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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