Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X20-20S
The AirTAC Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X20-20S is a genuine double acting, adjustable stroke + cushion standard round-body mini air cylinder with a Ø25mm bore and 20mm 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
- Stroke20 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 MACJ25X20-20S
Where a fixture needs on-site stroke tuning, this 20 mm-travel mini cylinder gives a 20 mm extend window plus a variable air cushion at both ends. MACJ builds a riveted round body - stainless barrel, 20 um hard-chrome rod, aluminium covers - that tolerates coolant mist and rinsing better than painted mini cylinders. At 0.5 MPa expect 245.3 N out and 206.1 N back; at 0.7 MPa push climbs to 343.4 N.
For day-to-day sizing, count on near 147 N of usable push at 0.5 MPa, enough for vertical lifts of about 12 kg with a 2:1 margin applied. Every unit carries its piston magnet as standard equipment, so CMSG, DMSG and EMSG switches attach for cycle confirmation. The stop screw is a position set, not a brake - if supply air drops, the rod can creep, so clamp the load independently.
Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X20-20S Technical Specifications
| Model | Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X20-20S |
|---|---|
| Series | MACJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 20 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 MACJ25X20-20S
| MACJ | Standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×20 | 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 MACJ25X20-20S Is Used
Tooling preset on press dies
Die setters trim the 20 mm window to match shim stacks on a stamping die, so no cylinder swap is needed between die changes.
Dispenser head Z-stop
A glue dispenser head rides this short-stroke cylinder; the 20 mm window dials Z-travel per bead pattern and the cushion stops head bounce.
Presence check on assembly nests
With a CMSG switch on the standard magnet, the cylinder confirms a part is fully seated in an appliance assembly nest before the next station indexes.
Is the Airtac MACJ Stainless Steel Mini Adjustable Cylinder MACJ25X20-20S the Right Cylinder?
Because 20 mm of travel rarely needs a big bore, check the 20 mm version (157 N push at 0.5 MPa) first; step up to the 32 mm bore (402.2 N) only for heavy clamping. Mount via FA flange, LB foot or I / Y knuckles, and match the 1/8 inch port on this bore. Note that the adjuster trims extend travel only and will not hold a load if air is lost.
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 MACJ25X20-20S FAQ
Full figures: 245.3 N push and 206.1 N pull at 0.5 MPa, 343.4 N push and 288.5 N pull at 0.7 MPa, and 50 kgf theoretical maximum at 1.0 MPa. It runs on 0.15-1.0 MPa (22-145 psi) at 30-800 mm/s with a 1.5 MPa (215 psi) proof rating.
The piston magnet is built in on every MA-series cylinder, so CMSG / DMSG / EMSG switches attach without ordering a special version. FA flange, LB foot and I or Y rod knuckles cover most fixturing needs.
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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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