Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø50mm bore and 125mm 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
- Stroke125 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 MACJ50X125-40S
A 40 mm trim window is the widest of this size, and on the MACJ50X125-40S it turns one 50 mm bore - rated 981 N push at 0.5 MPa - into several stroke settings for mixed products on a single fixture. Variable air cushions at both ends absorb the shock when the stop screw takes the hit.
The stainless round barrel and hard-chrome plated rod cope with humidity and rinse-down that ruin painted minis, while the riveted aluminium covers keep the unit light. Magnet included as standard, so CMSG / DMSG / EMSG switches bolt on without ordering a special piston. At 0.5 MPa assume near 589 N of real working force - about a 50 kg vertical lift with a 2:1 margin.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø50 mm |
| Stroke | 125 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 MACJ50X125-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | Bore size in mm. |
| ×125 | 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 MACJ50X125-40S Is Used
Tote indexer on a picking line
One cylinder serves 85, 105 and 110 mm tote pitches by re-setting the 40 mm window between shifts, no cylinder swap needed.
Juice-press pre-plate
981 N at 0.5 MPa seats the pre-plate on 5 L juice presses, and the dual cushions tame the final seating shock.
Robotic gripper home stop
EMSG switching confirms home position on a pick arm while the adjustable stop defines the grip approach point cycle after cycle.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-40S the Right Cylinder?
Between the MACJ40 at 628 N and the MACJ63 at 1558 N (both 0.5 MPa push), this 50 mm unit fits mid-duty presses and clamps. At 125 mm stroke keep side load low or guide the load externally to protect the 16 mm rod. The adjuster shortens extend travel only and holds nothing on air loss - fit a locking valve if the load must stay put. FA flange / LB foot, I / Y knuckles, 1/4 inch ports.
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 MACJ50X125-40S FAQ
Push 981.3 N and pull 880.8 N at 0.5 MPa; push 1373.8 N and pull 1233.1 N at 0.7 MPa; theoretical maximum 200.1 kgf at 1.0 MPa. Extend stroke trims within a 40 mm window, both ends carry variable air cushion, pressure 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, 1/4 inch ports, 16 mm rod.
The stop screw is a mechanical end stop that only shortens the extend stroke; it is not a brake or mid-stroke lock, so the piston still drifts on air loss. Use a locking valve for true load holding, and since the MACJ cushion is variable you can also soften the stop impact itself.
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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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