Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X120-30S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X120-30S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø25mm bore and 120mm 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.
- BoreØ25 mm
- Stroke120 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM10×1.25
- 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 MACJ25X120-30S
With a 30 mm adjust window over a 120 mm body, the MACJ25X120-30S covers product-size changes on longer-reach stations without swapping cylinders. Double-acting and cushioned variably at both ends, it converts 0.5 MPa into 245.3 N of push (206.1 N pull) through a hard-chrome plated 10 mm rod.
The stainless barrel with rolled aluminium covers resists the condensation and splash that flake painted minis in food and outdoor cells, so it suits washdown-adjacent stations. Size the job at roughly 147 N of working thrust at 0.5 MPa - about 12 kg of vertical lift at a 2:1 margin - and keep the 1/8" port lines short for snappy response across the 30-800 mm/s speed range.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X120-30S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X120-30S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 120 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 300 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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 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 MACJ25X120-30S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×120 | 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 MACJ25X120-30S Is Used
Chain conveyor indexing stop
Stops pallets at a robotic pick cell; the 30 mm trim absorbs fixture tolerance so the pallet parks in the same spot every cycle.
Bowl outfeed gate
Gates parts leaving a vibratory bowl feeder; stainless barrel and chrome rod handle the light oil mist common around feeding stations.
Leak-test fixture clamp
Seals a test mandrel into a small housing; about 147 N of working thrust at 0.5 MPa seats the seal without distorting the part.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X120-30S the Right Cylinder?
Step down to the MACJ20 if 157 N at 0.5 MPa is enough, or up to the MACJ32 for 402.2 N when loads rise. The 30 mm stop screw trims the extend stroke only; it seats mechanically at end of stroke but is not a lock against drift when air pressure drops. FA flange, LB foot and I/Y rod knuckles cover the usual fixings, and the built-in magnet accepts CMSG/DMSG/EMSG switches. Pressure span is 0.15-1.0 MPa (22-145 psi).
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 MACJ25X120-30S FAQ
At 0.5 MPa: 245.3 N push and 206.1 N pull. At 0.7 MPa: 343.4 N push and 288.5 N pull. The theoretical ceiling is 50 kgf at 1.0 MPa. Working pressure spans 0.15-1.0 MPa (22-145 psi) and travel speed 30-800 mm/s.
FA flange and LB foot are the standard mounts, with I and Y rod knuckles available for linked mechanisms. The magnet is included as standard, so CMSG, DMSG or EMSG switches snap onto the barrel without a special-order piston - handy for confirming the trimmed extend position set by the 30 mm stop.
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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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