Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-50S
The AirTAC MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-50S is a genuine double acting, double rod, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 225mm 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.
- BoreØ40 mm
- Stroke225 mm
- Port size1/8"
- Acting typeDouble acting, double rod, adjustable stroke + cushion
- Rod threadM12×1.25
- 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 MACJ40X225-50S
Built as a riveted round-body unit with a stainless-steel barrel and a hard-chrome plated rod (20 um), the MACJ40X225-50S handles damp workshops and occasional washdown far better than painted-steel minis. It is double-acting with an adjustable extend stroke: a stop screw trims the 225 mm stroke by up to 50 mm on site, and a variable air cushion at both ends soaks up shock across the 30-800 mm/s speed band.
At 0.5 MPa the 40 mm piston pushes 628 N, which leaves about 377 N of practical working force once you size with a margin. The magnet is built in as standard, so CMSG, DMSG or EMSG switches clip straight onto the barrel.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-50S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-50S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 225 mm |
| Acting type | Double acting, double rod, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Force (both ways) |
|---|---|
| 0.5 MPa | 528 N |
| 0.7 MPa | 739 N |
| Max (@1.0 MPa) | 108 kgf |
MAJ / MACJ are double-rod: the rear rod that carries the stroke adjuster exits the rear cover, so both piston faces lose rod area. The rod-side (annular) area is used for both directions (conservative).
Model Code: Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-50S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×225 | Stroke length in mm. |
| -50 | 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 (double rod, 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 MACJ40X225-50S Is Used
Carton-indexing pusher
On a packaging conveyor, the 50 mm trim window lets you dial the push stroke to each carton pitch while 628 N at 0.5 MPa moves fully loaded boxes.
Bottling line reject gate
Flipping faulty bottles off a beverage line needs a fast, quiet swing; the dual variable cushions let the gate run at higher speed without cover hammer.
Fixture clamp in a machining cell
Holding aluminum housings before drilling: about 377 N of usable force seats parts firmly, and the stainless barrel tolerates constant coolant mist.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X225-50S the Right Cylinder?
Need less force? The 32 mm MACJ delivers about 402 N at 0.5 MPa; need more? The 50 mm bore reaches 981 N. Between those, this 40 mm unit at 628 N covers medium clamping and transfer heads. A long 225 mm stroke asks for external guiding or a Y rod knuckle so side load never bends the 16 mm rod. Note the adjuster is a mechanical end stop, not a mid-stroke lock - the rod will drift if air is lost. Mount via FA flange or LB foot; the built-in magnet works with CMSG, DMSG and EMSG sensors without any option order.
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 MACJ40X225-50S FAQ
It is double-acting with the extend stroke adjustable by up to 50 mm from the 225 mm base, a variable air cushion at both ends, 0.15-1.0 MPa (22-145 psi) operating pressure, and speeds of 30-800 mm/s.
No. Every MACJ ships with a built-in magnet as standard, so CMSG, DMSG or EMSG switches mount directly on the stainless barrel for end-of-stroke or zone detection - no special-order piston required.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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