Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-50S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-50S 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 MACJ50X125-50S
Big thrust in a compact round body: at 0.5 MPa the 50 mm bore of the MACJ50X125-50S generates about 981 N of push (881 N on retract), enough for clamps, chutes and small presses that 40 mm minis stall on. Keep real duty near 589 N and the seals, cushion and rod bearing all live longer.
On the vertical side that is about 100 kg of lift capability, or 50 kg designed to a 2:1 margin - match it against actual part weight. The riveted stainless barrel and hard-chrome rod take moisture in stride, a 1/4" port feeds the flow, and the extend stroke trims anywhere within the ordered 50 mm window with variable cushion at both ends. Give it 0.15-1.0 MPa (22-145 psi) of 40 um filtered air and it cycles 30-800 mm/s.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-50S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-50S |
|---|---|
| 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 MACJ50X125-50S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | Bore size in mm. |
| ×125 | 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 MACJ50X125-50S Is Used
Case squaring on a box erector
Erected cases get squared before taping; 981 N at 0.5 MPa straightens double-wall board, and the 50 mm trim covers case heights from 75 mm up to the full 125 mm stroke.
Vision inspection riser
An inline camera head lifts 125 mm to clear product; the stop screw shortens travel for small parts, and 50 kg vertical capacity with margin carries the camera and bracket.
Hopper slide gate, feed mill
A slide gate meters pellet feed under a small hopper; the both-end cushion stops the gate slamming shut, and roughly 589 N of working thrust shears bridged pellets at the edge.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-50S the Right Cylinder?
Step around the range: the 40 mm bore gives about 628 N at 0.5 MPa and the 63 mm bore about 1558 N; this 50 mm at 981 N is the heavy middle. It carries a 16 mm rod, so on a 125 mm stroke with outboard loads, guide the load externally or support the rod to keep bending stress down.
Choose LB foot or FA flange fixing, with I / Y knuckles where the linkage pivots. The stop screw is an end-of-travel positioner only - it will not lock the piston when air is lost. Magnet is fitted as standard for CMSG / DMSG / EMSG switching.
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 MACJ50X125-50S FAQ
At 0.5 MPa: 981 N push and 881 N pull. At 0.7 MPa: 1374 N push and 1233 N pull. Theoretical maximum is about 200 kgf at 1.0 MPa. Ports are 1/4" and the rod thread is M14x1.5.
Yes. The magnet comes built into every MACJ piston as standard, so a CMSG, DMSG or EMSG switch mounts on the barrel whenever the machine needs end-of-stroke or trimmed-position feedback - no retrofit piston required.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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