Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X300-40S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X300-40S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø25mm bore and 300mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke300 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 MAJ25X300-40S
One screw sets your stop: the -40 code on MAJ25X300-40S means the extend stroke can land anywhere from 260 mm to the full 300 mm, adjusted on the machine without shims or re-piping. Forward force is 245.3 N at 0.5 MPa and 343.4 N at 0.7 MPa, peaking at a theoretical 50 kgf.
Fixed anti-impact pads soften arrival at each end of travel; they decelerate only and are not adjustable air cushions, which is the MACJ family's job. The riveted stainless round tube stays slim inside tight guards, and because the magnet is built in, DMSG or CMSG switches read end positions straight out of the box. Match it to parts up to about 12 kg for vertical picks once you halve the 25 kg theoretical lift.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X300-40S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X300-40S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 300 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 MAJ25X300-40S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×300 | 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 MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X300-40S Is Used
Light divert arm in a pick module
Swing light totes between lanes with 245.3 N at 0.5 MPa; set the stop screw 40 mm short so the arm parks clear of the lane edge.
Sliding-door closer in a paint-mix room
Damp, solvent-laden air is no problem for the stainless tube; the 300 mm stroke closes the sliding door and the magnet confirms the latch.
Depth setting on a drill fixture
Set hole depth by trimming the extend stroke up to 40 mm; the fixed bumpers absorb the shock when the bit breaks through.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X300-40S the Right Cylinder?
If 245.3 N at 0.5 MPa is more than the job needs, the bore 20 version saves space at 157.0 N; if the load grows past roughly 300 N, bore 32 with its 402.2 N is the safer pick. On a 300 mm stroke, off-axis loads will bend the slim 10 mm rod, so slide or guide the part rather than pushing it sideways. The FA and LB mount codes match other MA-family cylinders, the magnet is included as standard, and note the stop screw trims extend travel only - it does not lock the rod when supply 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 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 MAJ25X300-40S FAQ
Use 245.3 N push and 206.1 N pull at 0.5 MPa, or 343.4 N push and 288.5 N pull at 0.7 MPa; the 25 mm bore tops out at a theoretical 50 kgf with a 1.0 MPa supply. Expect 1/8" ports, a 10 mm rod and an M10x1.25 male thread.
FA flange and LB foot brackets fit the covers, and I or Y rod knuckles handle pivoting loads; the adjustable version has no SDB option. The piston magnet is built in as standard, so a CMSG, DMSG or EMSG switch clips on for end-of-stroke feedback.
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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