Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X80-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X80-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø50mm bore and 80mm stroke, 1/4" 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.
- BoreØ50 mm
- Stroke80 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM14×1.5
- 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 MACJ50X80-40S
If your cycle keeps asking for a slightly different extend position, this 50 mm MACJ answers with a 40 mm trim window instead of a new part number. Double-acting with 981 N of push at 0.5 MPa, it clamps, presses and ejects all day, and the stop screw trims the extend stroke by up to 40 mm in situ. Variable cushions at each end let you chase 800 mm/s without hammering the covers.
Under the skin: a riveted stainless barrel, hard-chrome rod and grease-retaining piston seals - a combination that stays smooth where painted minis corrode in damp or washdown spots. Vertically it can theoretically lift 100 kg at full pressure; keep real lifts near 50 kg and you keep a 2:1 margin plus long seal life. The magnet comes standard, ready for DMSG or EMSG switches.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X80-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X80-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 80 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 881 N |
| 0.7 MPa | 1374 N | 1234 N |
| Max (@1.0 MPa) | 200 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 MACJ50X80-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | Bore size in mm. |
| ×80 | 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.
Where the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X80-40S Is Used
Die-cast part ejection
Kicks cooled housings off a trim press table. The 40 mm window dials the ejector face flush with the die, and 981 N clears stubborn castings.
Pallet-carton squaring
Squares cartons before strapping on a palletiser infeed. The stainless barrel survives the humid warehouse, and cushions stop the boxes bouncing.
Guard gate lift
Raises an interlocked guard on a CNC cell. The stop screw sets opening height to the millimetre, and the magnet signals closed position to the safety PLC.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X80-40S the Right Cylinder?
Compare both neighbours before committing: a 40 mm bore gives 628 N at 0.5 MPa, a 63 mm bore 1558 N - this 50 mm sits squarely between them. The adjuster is an end stop for the extend stroke, not a brake, so an unsupported load will creep if the air drops. FA flange and LB foot mountings cover frame and base fixing; add I or Y knuckles where the load must pivot.
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 MACJ50X80-40S FAQ
Push force is 981.3 N and pull 880.8 N at 0.5 MPa; at 0.7 MPa you get 1373.8 N push and 1233.1 N pull, with a 200.1 kgf theoretical ceiling at 1.0 MPa. It runs on 0.15-1.0 MPa (22-145 psi), survives 1.5 MPa (215 psi) proof, and cycles at 30-800 mm/s.
Yes - the body is a stainless-steel tube rolled onto aluminium covers, with a hard-chrome plated carbon-steel rod, so there is no paint to flake in washdown mist, coastal air or food-plant humidity. That round riveted construction also keeps the envelope compact for tight machine layouts.
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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