Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-30S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-30S 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 MACJ50X125-30S
AirTAC built the MACJ50X125-30S around a 50 mm stainless barrel that pushes 981 N at 0.5 MPa - comfortably into medium-press territory for a mini cylinder. A 30 mm adjustment window lets maintenance dial the extend stroke down to match tooling changes, and dual variable cushions keep stops gentle anywhere from 30 to 800 mm/s.
Because the round body is rolled and riveted, there are no tie rods to loosen under vibration. The rod is hard-chrome plated carbon steel, and a piston magnet is fitted as standard for CMSG / DMSG / EMSG switching. For sizing, treat about 589 N as realistic working force at 0.5 MPa; that corresponds to lifting roughly 50 kg vertically with a 2:1 margin.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-30S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-30S |
|---|---|
| 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 MACJ50X125-30S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 50 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -30 | 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 MACJ50X125-30S Is Used
Textile loom stopper
The 30 mm window matches pick-stopping throw on rapier looms, and the cushions absorb the stop at 600 mm/s line speed.
Woodworking hold-down
Clamps MDF panels on a CNC router bed; the stainless barrel survives glue mist and the humid air of a busy joinery.
Box-heighting gate on a filler
Trim within 30 mm to re-level cartons between bottle sizes; the magnet drives a DMSG sensor for gate-down proof before filling starts.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ50X125-30S the Right Cylinder?
Step down to the MACJ40 (628 N push at 0.5 MPa) for compact cells, or up to the MACJ63 (1558 N) when stamping loads climb; this 50 mm bore sits between them. The stroke adjuster is an end stop, not a mid-stroke lock - if air is lost the piston drifts, so do not count on it to hold. Mount FA or LB, add I or Y knuckles, order PT, G or NPT threads.
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 MACJ50X125-30S FAQ
At 0.5 MPa: 981.3 N push, 880.8 N pull. At 0.7 MPa: 1373.8 N push and 1233.1 N pull. Theoretical maximum is 200.1 kgf at 1.0 MPa. Stroke adjusts over a 30 mm window, cushion is variable at both ends, operating pressure is 0.15-1.0 MPa (22-145 psi), and the speed range is 30-800 mm/s.
FA flange and LB foot brackets plus I and Y rod knuckles cover most fixturing needs. The standard piston magnet accepts CMSG, DMSG and EMSG switches along the barrel groove - no special piston required. Note the adjustable version carries no SDB or back-cover mounting code.
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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