Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X50-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X50-20S 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 MACJ25X50-20S
Every MACJ25X50-20S ships with the position magnet already inside the piston - no special order, no waiting - so CMSG, DMSG or EMSG switches drop straight onto the stainless barrel for end-of-stroke signalling. Behind that barrel sits a double-acting cylinder with a 20 mm adjustable extend window and a variable air cushion at each end, built from rolled aluminium covers and a 20 um hard-chrome rod.
Force-wise, expect 245.3 N push and 206.1 N pull at 0.5 MPa, climbing to 343.4 N push at 0.7 MPa, with 50 kgf theoretical at 1.0 MPa. Treat about 147 N as the honest working force and the cylinder will lift roughly 12 kg vertically while keeping a 2:1 margin. Air supply is 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X50-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X50-20S |
|---|---|
| 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 MACJ25X50-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -20 | 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 MACJ25X50-20S Is Used
Glue-bead press on a woodwork cell
Holds a roller head steady with about 147 N of working force; the 20 mm window compensates for roller wear between changeovers.
Stacking punch on a blister packaging line
Cushioning on both ends protects thin blister webs at up to 800 mm/s; magnet-driven DMSG switches confirm up and down positions to the PLC.
Slide gate actuation on a hopper outlet
245 N at 0.5 MPa slides a small gate against powder pressure; the stainless barrel stands up to dusty, slightly damp hopper surroundings.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X50-20S the Right Cylinder?
Next size down, bore 20, gives 157.0 N push at 0.5 MPa; next size up, bore 32, delivers 402.2 N - pick this 25 mm unit when the load lands between roughly 90 and 240 N of real work. The 50 mm stroke with a 20 mm trim range covers fixtures that need final-position tuning after installation.
Remember the adjuster is an end stop, not a mid-stroke lock: cut the air and the piston can still drift, so do not rely on it to hold raised loads. Mounting options are FA flange and LB foot, with I or Y rod knuckles for swivel joints.
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 MACJ25X50-20S FAQ
MACJ25X50-20S: push 245.3 N and pull 206.1 N at 0.5 MPa; push 343.4 N and pull 288.5 N at 0.7 MPa; theoretical 50 kgf at 1.0 MPa. Supply 0.15-1.0 MPa (22-145 psi) filtered to 40 um, proof pressure 1.5 MPa (215 psi), speed 30-800 mm/s, 50 mm stroke, 20 mm adjustable window, 1/8" ports.
No - it is built into every MA-series piston as standard, so CMSG / DMSG / EMSG reed switches mount on the barrel without a special-order cylinder. Combine that with the 20 mm stroke trim and both-end variable cushion to tune position sensing and soft landings on the same unit.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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