Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X70-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X70-20S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø25mm bore and 70mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke70 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 MAJ25X70-20S
Tuned for fixtures where the exact forward position matters, the MAJ25X70-20S pairs a 70 mm base stroke with a 20 mm external trim window: a stop screw lets you shorten the extend stroke on site without swapping cylinders. It is double acting throughout, running on filtered air at 0.15-1.0 MPa (22-145 psi) with speeds of 30-800 mm/s. At the bore's 0.5 MPa rating the piston delivers 245.3 N on the extend move and 206.1 N on the return.
The round body is a stainless barrel with aluminium covers riveted in place, and the carbon-steel rod carries a 20 um hard-chrome plating, a combination that shrugs off washdown mist better than painted minis. Plan on roughly 147 N of usable push at 0.5 MPa; with a 2:1 margin that is about 12 kg of vertical lift per cylinder. A magnet comes built in, so CMSG, DMSG or EMSG switches clip straight on, and fixed bumper pads soften the stroke ends.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X70-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X70-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 70 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 MAJ25X70-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×70 | 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 MAJ25X70-20S Is Used
Pneumatic clamping fixture
Toe clamps on a CNC fixture plate, trimmed to close at a repeatable 50-70 mm reach so the cutter path never shifts between setups.
Carton kick-off gate
A divert gate on a packing line that only needs the last 55 mm of travel, set with the stop screw after commissioning.
Sensor-triggered ejector
Reject pusher on a checkweigher conveyor flicking undersized packs off the belt, with a DMSG switch confirming full extension.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X70-20S the Right Cylinder?
If 245 N at 0.5 MPa feels oversized, the bore 20 MAJ gives 157 N; if the job creeps toward 400 N, step up to the bore 32 unit at 402.2 N. Keep in mind the stop screw is a mechanical end stop only - on air loss the rod will drift, so it does not hold a load mid-stroke. FA flange and LB foot mounts plus I and Y rod knuckles cover most fixture layouts, and the -20 window can be trimmed anywhere inside the 70 mm travel.
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 MAJ25X70-20S FAQ
At 0.5 MPa it pushes 245.3 N and pulls 206.1 N; at 0.7 MPa the numbers rise to 343.4 N push and 288.5 N pull. The theoretical ceiling at 1.0 MPa works out to 50 kgf. The port is 1/8", the rod is 10 mm with an M10x1.25 male thread, and pressure spans 0.15-1.0 MPa (22-145 psi).
No - every MA-series piston ships with a magnet already fitted, so CMSG, DMSG and EMSG switches mount directly on the barrel for end-of-stroke signalling without any special order.
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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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