Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X20-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X20-20S is a genuine double acting, adjustable stroke 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.
- BoreØ25 mm
- Stroke20 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM10×1.25
- CushionFixed anti-impact bumper pads
- 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X20-20S
Here the full 20 mm ordered stroke doubles as the adjustment window, so the external stop screw can park the extend stroke anywhere within it - ideal for locating, pressing and part-present moves that need exact repeatability. Expect 245.3 N push and 206.1 N pull at 0.5 MPa from the bore 25 double-acting piston, with fixed bumper pads decelerating each stroke end.
AirTAC rolls the stainless barrel, aluminium covers and stainless block into a compact riveted body that shrugs off damp shop air, and plates the rod with 20 um of hard chrome for long seal life. The piston magnet is standard equipment on MA, ready for CMSG, DMSG or EMSG switches. For sizing, plan on roughly 147 N of real work at 0.5 MPa - that lifts about 12 kg vertically with a 2:1 margin.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X20-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X20-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 20 mm |
| Acting type | Double acting, adjustable stroke |
| 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 | Fixed anti-impact bumper pads |
| 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X20-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X20-20S Is Used
Terminal staking
Staking terminals into small connectors needs a short, firm hit - about 147 N of usable push at 0.5 MPa - and the full 20 mm window lets you tune the stroke stop to the stake height.
Part kick-off
Knocking single components off an assembly nest works well at 245.3 N push; the stop screw prevents over-travel that would scatter the part down the chute.
Drill press hold-down
A hold-down foot clamps a workpiece flat before drilling; with 206.1 N pull at 0.5 MPa on retract, the foot clears the drill path cleanly each cycle.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X20-20S the Right Cylinder?
Sizing check: bore 20 pushes 157.0 N at 0.5 MPa and bore 32 reaches 402.2 N; this bore 25's 245.3 N push / 206.1 N pull suits mid-range short-stroke work. Because the stop screw sets extend position only, do not rely on it to hold a payload - without air the piston is free to move. Choose FA flange or LB foot, bolt on an I or Y knuckle where the linkage needs it, and run 0.15-1.0 MPa (22-145 psi) through the 1/8" ports at 30-800 mm/s.
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 Bumper models: keep speed within the rated range.
- check Installation by qualified personnel per AirTAC docs.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X20-20S FAQ
Yes: 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 at 1.0 MPa. Plan work loads around 147 N for a safety margin. The extend stroke adjusts across the 20 mm window; supply is 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, port 1/8".
The adjustable-stroke version accepts FA flange and LB foot mounts, plus I and Y rod knuckles on the piston rod; the adjustable range has no SDB or back-cover variants. Thread options are PT (blank), G or NPT - pick the port style when ordering.
Authorized Export Seller
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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