Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X50-50S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X50-50S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø40mm bore and 50mm 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
- Stroke50 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 MACJ40X50-50S
Order the MACJ40X50-50S when you want the whole 50 mm stroke adjustable: the 50 mm window lets the stop screw land the rod at any point from full stroke down to almost zero. It is double-acting with a variable cushion at both ends, runs 30-800 mm/s on filtered air at 0.15-1.0 MPa (22-145 psi), and pushes 628 N at 0.5 MPa or 880 N at 0.7 MPa. Keeping 60 percent of the 0.5 MPa rating for real work still leaves about 377 N of dependable force.
Because both ends carry a variable cushion, faster cycle speeds or heavier overhangs no longer hammer the covers at end of stroke. The rolled stainless tube and 20 um hard-chrome plated rod handle humid or lightly washed environments with ease. Every unit ships with its magnet fitted - CMSG, DMSG and EMSG switches mount straight on.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X50-50S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X50-50S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 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 MACJ40X50-50S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 MACJ40X50-50S Is Used
Conveyor divert gate
A pop-up diverter on a parcel conveyor needs a firm 600 N nudge; 880 N at 0.7 MPa from this bore swings the gate with cushioned landings at both ends.
Bench-top test rig
Loading coupons in a materials test rig at roughly 377 N of repeatable force is comfortable for this bore, and the fully trimmable stroke sets the approach gap without shims.
Filler rinse valve
Actuating a rinse or divert valve on a washdown filler suits the stainless barrel; 628 N at 0.5 MPa easily opens a spring-loaded valve body.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ40X50-50S the Right Cylinder?
Compare forces before you fix the bore: 32 mm gives 402 N at 0.5 MPa and 50 mm gives 981 N, so 628 N from this 40 mm bore covers mid-range work without oversizing the envelope. The stop screw shortens the extend stroke only - it never lengthens past 50 mm and it will not lock the piston against air loss, so treat load retention as a valve job. Even at this short stroke, side load on the 16 mm rod is the usual failure cause; guide the load externally rather than cantilevering it. FA and LB mounts plus I and Y knuckles cover most fixture needs, and the built-in magnet accepts CMSG through EMSG switches.
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 MACJ40X50-50S FAQ
Push at 0.5 MPa is 628 N against 528 N on the pull side. Raise the supply to 0.7 MPa and you get 880 N extend and 739 N retract; the theoretical maximum at 1.0 MPa (145 psi) works out to 128 kgf.
A high-precision stainless barrel is rolled onto aluminium covers around a hard-chrome plated 16 mm rod, so mild washdown and damp air are no problem. The magnet is built in as standard, so CMSG, DMSG or EMSG switches mount without special ordering. Ports are 1/8"; mounting is FA flange or LB foot, with I or Y rod knuckles.
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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