Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X350-50S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X350-50S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 350mm 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
- Stroke350 mm
- Port size1/8"
- Acting typeDouble acting, 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 MACJ40X350-50S
Reach and force in one package: the MACJ40X350-50S covers 350 mm of travel on a 40 mm bore, pushing 628.3 N at 0.5 MPa and 879.6 N at 0.7 MPa. The extend stroke can be trimmed on site anywhere inside a 50 mm window with the external stop screw, and a variable air cushion at both ends soaks up end-of-travel shock, so faster speeds or heavier loads arrive without hammering the covers.
The round body is a riveted stainless-steel barrel with a hard-chrome plated rod and aluminium covers, a build that shrugs off washdown and damp plant air where painted minis corrode. With 628.3 N on tap, expect roughly 377 N of practical working force at 0.5 MPa once you keep the usual 40% margin. A magnet is built in as standard, so CMSG, DMSG or EMSG switches clip on without any special piston.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X350-50S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X350-50S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 mm |
| Acting type | Double acting, 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 | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MACJ40X350-50S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 MACJ40X350-50S Is Used
Carton eject across a wide lane
At the end of a secondary packaging conveyor, the 350 mm stroke clears a full carton width in one push, with the 50 mm window letting line staff tune the park position between carton sizes.
Lifting a guard gate on a filler
A light aluminium guard gate on a bottle-filling machine lifts clear of the deck; 628.3 N push at 0.5 MPa handles the weight and the end cushion stops the gate slamming at the top of travel.
Tray shuttle between pick shelves
Sliding totes across a 350 mm gap between pick faces, the cylinder runs anywhere in its 30-800 mm/s range so the shuttle speed matches the picker, with DMSG switches confirming home and out positions.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X350-50S the Right Cylinder?
Size check: at 0.5 MPa the 32 mm MACJ pushes 402.2 N and the 50 mm bore reaches 981.3 N, so this 40 mm class suits mid-weight slides, gates and ejectors between those extremes. Pull force at 0.5 MPa is 527.8 N because the rod steals bore area - check that against retract springs or weights. The adjuster is an end stop for the extend stroke only; it will not lock the piston in place if air is lost, so add a blocking valve for load holding. On 350 mm of travel, keep side load off the 16 mm rod - guide the load externally and use FA flange or LB foot mounting with I or Y knuckles to align it. Ports are 1/8", rod thread M12x1.25, and theoretical output at 1.0 MPa is 128.1 kgf.
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 MACJ40X350-50S FAQ
At 0.5 MPa the 40 mm bore pushes 628.3 N and pulls 527.8 N; raise supply to 0.7 MPa and those figures rise to 879.6 N push and 738.9 N pull. The theoretical ceiling at 1.0 MPa is 128.1 kgf. Ports are 1/8" and the rod thread is M12x1.25 on a 16 mm rod.
No. Every MA-series cylinder leaves the factory with a magnet in the piston, so AirTAC CMSG, DMSG and EMSG switches mount straight onto the stainless barrel to signal extend and retract positions - no special-order piston and no extra sensor kit.
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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