Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X225-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X225-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø25mm bore and 225mm 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
- Stroke225 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 MACJ25X225-40S
Machines that get re-tooled benefit from the MACJ25X225-40S: the stop screw trims the extend stroke by up to 40 mm, so a 225 mm cylinder can be set anywhere down to 185 mm without ordering new parts. Double-acting air and variable cushions at both ends keep a 245 N push at 0.5 MPa controlled across the 30-800 mm/s speed band.
Inside is a stainless-steel barrel with a 20 um hard-chrome rod - a combination that stays smooth where coolant mist or outdoor damp would pit a painted mini. Keep the working push near 147 N for a 2:1 margin, which corresponds to lifting about 12 kg vertically. The magnet comes standard, so a CMSG or EMSG switch drops on whenever end-of-stroke signals are needed.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X225-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X225-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 225 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 MACJ25X225-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×225 | 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 MACJ25X225-40S Is Used
Machine-tending part presenters
Swings a part nest into a CNC vise area; the 40 mm trim lets one cylinder serve several fixture generations.
Tray divider actuator
Drops plastic dividers into food trays between lanes with cushioned, repeatable end positions.
Vertical gauge lowering
Lowers a checking gauge onto machined parts with about 12 kg capacity at a safe margin, EMSG confirming contact.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X225-40S the Right Cylinder?
Force-wise, this 25 mm bore delivers 245 N extend and 206 N retract at 0.5 MPa; the 20 mm bore (157 N) covers lighter duty and the 32 mm bore (402 N) heavier clamping. Note the adjuster only shortens the extend stroke - it never adds travel past 225 mm and it will not hold a load if air pressure is lost.
Fit FA flange or LB foot plates, I or Y knuckles on the rod, and order G or NPT threads instead of PT if your piping standard demands it. At 225 mm of stroke on a 10 mm rod, support the load in its own guides rather than letting the rod carry side force.
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 MACJ25X225-40S FAQ
Push at 0.5 MPa is 245.3 N and pull is 206.1 N; at 0.7 MPa you get 343.4 N push and 288.5 N pull, with 50 kgf the theoretical maximum for a 25 mm bore at 1.0 MPa. The stroke trims from 225 mm down to 185 mm via the stop screw, speed spans 30-800 mm/s, and pressure runs 0.15-1.0 MPa (22-145 psi).
No. It is a mechanical end stop that sets where the extend stroke finishes - it does not clamp the piston mid-travel. If air pressure drops, the rod can still move, so fit a holding or check valve for load retention. What it does add is the variable cushion: shock at both ends is absorbed by air, not metal.
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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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