Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X400-50S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X400-50S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø50mm bore and 400mm 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
- Stroke400 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 MACJ50X400-50S
Four hundred millimetres of travel from a compact round body makes the MACJ50X400-50S a natural for deep reach into conveyors and machine frames. It is double-acting, with the extend stroke trimmable by up to 50 mm via the stop screw and a variable cushion at each end. Push force is 981 N at 0.5 MPa, rising to 1374 N at 0.7 MPa.
Strength comes from the rolled stainless barrel and a 16 mm hard-chrome rod that shrugs off rust in damp plants. Count on roughly 589 N of dependable working force at 0.5 MPa - enough to lift about 50 kg vertically with a 2:1 safety margin - so match real part weights against that figure. Feedback is already on board: the piston magnet arrives as standard and pairs with CMSG / DMSG / EMSG switches.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X400-50S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X400-50S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 400 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 MACJ50X400-50S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | Bore size in mm. |
| ×400 | 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 (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 MACJ50X400-50S Is Used
Deep-rack parts retriever
Pushes totes off the back of long shelving bays in a kitting area where arms cannot reach.
Cross-belt transfer pusher
Moves parcels between conveyor lanes; the 50 mm window absorbs lane-width variation between lines.
Mix-tank lid actuator
Opens and closes the lid of a 200 L process tank; the stainless body stands up to frequent caustic washdown.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X400-50S the Right Cylinder?
At this 400 mm stroke, guide the tooling externally - side loads will bend a 16 mm rod over long travel. The MACJ40 (628 N push at 0.5 MPa) suits lighter reach duties, while the MACJ63 (1558 N) handles heavier pushes across the same stroke. Choose FA flange or LB foot mounting, and order G or NPT threads if PT does not match your plant fittings.
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 MACJ50X400-50S FAQ
Force figures: 981 N push and 881 N pull at 0.5 MPa, rising to 1374 N push and 1233 N pull at 0.7 MPa, with a 200 kgf theoretical maximum at 1.0 MPa. Supply pressure is 0.15-1.0 MPa (22-145 psi) filtered air, speed range 30-800 mm/s, ports 1/4" PT (G or NPT to order).
It is the adjustable window: the stop screw can shorten the 400 mm extend stroke by up to 50 mm, and backing it off restores full travel. It acts only at end of stroke and never as a mid-stroke brake, so the rod will move if air pressure is lost while the cylinder carries a load.
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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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