Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X350-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X350-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø50mm bore and 350mm 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
- Stroke350 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 MACJ50X350-40S
With a 50 mm bore, 350 mm stroke and a 40 mm adjustable extend window, the MACJ50X350-40S covers medium-duty pressing and pushing across four machine variants from one spare. It is double-acting, so air drives both the extend and retract strokes, and a variable air cushion at each end absorbs the shock of fast or heavy travel. Push force is 981 N at 0.5 MPa, climbing to 1374 N at 0.7 MPa.
This is AirTAC's own riveted round-body construction - a stainless barrel rolled onto aluminium covers with a 20 um hard-chrome rod that resists corrosion in damp food and outdoor settings. The magnet comes as standard, ready for CMSG, DMSG or EMSG switches. In practice, budget about 589 N of the 0.5 MPa rating for useful work rather than the full 981 N.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X350-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X350-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 350 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 MACJ50X350-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | Bore size in mm. |
| ×350 | 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 MACJ50X350-40S Is Used
Tray forming press
Folds carton flaps on a packaging line; the 40 mm window adapts one machine to several tray depths.
Machine guard lift
Raises a sliding guard on a CNC cell, with the built-in magnet feeding a CMSG switch to the interlock circuit.
Tote diverting arm
Swings totes off a sortation conveyor, using both end cushions to keep the 350 mm travel quiet at speed.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X350-40S the Right Cylinder?
Downsize to a 40 mm bore (628 N at 0.5 MPa) for lighter clamps, or move to 63 mm (1558 N) for heavier press work. The stop screw only sets the extend limit - it will not lock the piston mid-stroke, so a load can sag if supply air is cut. Mount with the FA flange or LB foot, add I or Y rod knuckles if the load pivots, and keep the 350 mm stroke aligned or guided to limit side load on the 16 mm rod.
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 MACJ50X350-40S FAQ
At 0.5 MPa: 981.3 N push and 880.8 N pull. At 0.7 MPa: 1373.8 N push and 1233.1 N pull. Maximum theoretical force at 1.0 MPa is 200.1 kgf on the 50 mm bore.
Open the variable air cushion screws at each cover to meter the last millimetres of travel, then set the extend stroke anywhere inside the 40 mm window with the stop screw. Together they let you run up to 800 mm/s without hammering the covers.
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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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