Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X50-40S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X50-40S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø25mm bore and 50mm 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
- Stroke50 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 MACJ25X50-40S
A 40 mm window on a 50 mm stroke gives the MACJ25X50-40S unusual on-site freedom: trim the extend stroke from the full 50 mm down to 10 mm with a stop screw, no re-plumbing needed. Air drives the rod both ways, and a variable cushion at each end soaks up shock so faster cycles or heavier loads stop without hammering the covers. Rated 245.3 N push and 206.1 N pull at 0.5 MPa, rising to 343.4 N push at 0.7 MPa.
The body is a riveted stainless barrel with a hard-chrome plated rod - genuinely corrosion-tough next to painted mini cylinders in food or outdoor corners. Every MA piston carries a magnet as standard, so CMSG, DMSG or EMSG switches mount without a special piston. For lifting, that 245.3 N equals about 25 kgf at 0.5 MPa; halve it for a 2:1 margin and you can lift roughly 12.5 kg vertically.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X50-40S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X50-40S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 50 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 MACJ25X50-40S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×50 | 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 MACJ25X50-40S Is Used
Fixture clamp on a drilling jig
Clamps parts with 245.3 N at 0.5 MPa while the 40 mm trim window absorbs jig tolerances; an FA flange bolts the body straight to the base plate.
Case diverter on a pack line
Pushes cartons between lanes; cushions at both ends let it cycle fast without shaking the frame, and about 147 N of usable push handles loaded cases.
Tool-change lock pin
A 10 mm rod slides a locking pin into a machining fixture; the built-in magnet with a CMSG switch confirms pin-in before the cycle starts.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X50-40S the Right Cylinder?
Sizing check: at 0.5 MPa bore 20 makes 157.0 N and bore 32 makes 402.2 N, so this 25 mm model sits in the middle for clamps and pushers. The trim screw is an extend-stroke end stop, not a lock - with air off, the load can still move the rod, so add an external lock if holding matters. FA flange and LB foot mounts, plus I / Y rod knuckles, cover most fixings. If you prefer bumper ends instead of air cushions, the MAJ is the sibling; for a fixed stroke, the MAC is the closer match.
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 MACJ25X50-40S FAQ
Push is 245.3 N and pull 206.1 N at 0.5 MPa; at 0.7 MPa you get 343.4 N and 288.5 N, with a theoretical ceiling of 50 kgf at 1.0 MPa. Working pressure is 0.15-1.0 MPa (22-145 psi), proof pressure 1.5 MPa (215 psi), and speed runs 30-800 mm/s.
Choose the FA flange or LB foot, and I or Y rod knuckles where the tooling pivots; adjustable models like this one have no SDB mount and no back-cover code. The MAJ is the adjustable sibling with bumpers, MAC is the fixed-stroke cushioned version, and MACD adds a double rod.
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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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