Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X75-40S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X75-40S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø25mm bore and 75mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke75 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 MAJ25X75-40S
Dial in your clamp or eject position without reordering: the MAJ25X75-40S pairs a 75 mm base stroke with a wide 40 mm trim window set by an external stop screw. This 25 mm double-acting bore produces 245.3 N forward and 206.1 N back at 0.5 MPa - treat about 147 N as the realistic working push once seals and friction are accounted for.
Construction is the classic MA recipe: stainless round barrel riveted to aluminium covers, hard-chrome 10 mm rod for low wear, and fixed anti-impact pads that decelerate the load at stroke end (these are bumpers, not adjustable air cushions - that is the MACJ family). The magnet is included on every unit, so DMSG or EMSG switches drop on for end-of-stroke sensing in jigs and test stations.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X75-40S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X75-40S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 75 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 MAJ25X75-40S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×75 | 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 MAJ25X75-40S Is Used
CNC fixture clamp blocks
Clamps small machined parts in a milling vise nest; the 40 mm window absorbs part-height variation between batches and 343.4 N at 0.7 MPa secures light cuts.
Bench test rig actuator
Applies a repeatable press load in a leak or spring-rate test station; an EMSG switch on the standard magnet confirms the trimmed stroke was reached every cycle.
Slide-gate diverter control
Drives a small slide gate on a dry-goods filling line, with the stainless barrel resisting dust-laden washdown air and the bumper pad quieting gate arrival.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X75-40S the Right Cylinder?
Between bores: a 25 mm MAJ at 245.3 N @0.5 MPa handles roughly one and a half times the push of a 20 mm model (157 N); step to 32 mm (402.2 N) for heavier fixture clamps. Air is 1/8 inch, rod thread M10x1.25. Mount with FA flange or LB foot, or add an I / Y rod knuckle on the tooling side. Note that the stop screw sets a firm end-of-travel position but does not hold the load against back-drive - under air loss the rod can still move. Stroke 75 mm is well inside the 300 mm standard maximum for this bore.
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 MAJ25X75-40S FAQ
Yes. Bore 25 mm, stroke 75 mm, 40 mm adjustable extend window. 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; 50 kgf theoretical maximum at 1.0 MPa. Fluid is filtered air (40 um), pressure 0.15-1.0 MPa (22-145 psi), speed 30-800 mm/s, port 1/8 inch.
A stop screw on the cylinder externally blocks the piston before the end of the 75 mm stroke, shortening the effective extend travel to any position within the ordered 40 mm window. It is purely mechanical end-of-travel adjustment: it sets where the rod stops extending but is not a mid-stroke brake or a load-holding lock, so gravity loads still need external support if air is lost.
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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