Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X500-20S
The AirTAC Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X500-20S is a genuine double acting, adjustable stroke standard round-body mini air cylinder with a Ø25mm bore and 500mm stroke, 1/8" air ports and a stainless-steel barrel with a hard-chrome-plated rod for reliable, mildly corrosion-resistant service.
- BoreØ25 mm
- Stroke500 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 MAJ25X500-20S
Double-acting and stroke-trimmable, the MAJ25X500-20S delivers 245.3 N of push at 0.5 MPa (343.4 N at 0.7 MPa) over a 500 mm stroke; a 20 mm stop-screw window shortens the extend stroke on site without swapping cylinders. Retraction pulls 206.1 N at 0.5 MPa.
The high-precision stainless tube and hard-chrome plated carbon-steel rod resist washdown chemistry and mild outdoor exposure, an edge over painted aluminium minis. Budget about 147 N for the actual job at 0.5 MPa, which lifts roughly 12 kg vertically with a 2:1 margin. Fixed anti-impact pads decelerate the piston at each stroke end; for tunable air cushioning, AirTAC's MACJ is the related type.
Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X500-20S Technical Specifications
| Model | Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X500-20S |
|---|---|
| Series | MAJ mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 500 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 MAJ25X500-20S
| MAJ | Standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×500 | 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 MAJ25X500-20S Is Used
Tray indexing
Advances a tray of vials one lane on a pharmaceutical filling line against pull force of 206.1 N at 0.5 MPa.
Bin lid lifter
Raises the hinged lid of a 40 L wash-station bin, matching the roughly 12 kg vertical-lift equivalent at 2:1 margin.
Lab sample pusher
Slides sample racks between stations in laboratory automation, where the stainless barrel tolerates repeated wipe-down.
Is the Airtac MAJ Double Rod Adjustable Stainless Steel Mini Cylinder MAJ25X500-20S the Right Cylinder?
The 500 mm travel is above the 300 mm standard limit for bore 25, so order it as a non-standard build. Compare sizes by force: the 20 mm bore offers 157 N push at 0.5 MPa for lighter jobs, while the 32 mm bore reaches 402.2 N. The stop screw only caps the extend direction - it will not hold a load mid-stroke when air pressure drops, so add an external lock where that matters. The magnet comes standard, so CMSG/DMSG/EMSG switches drop straight on. Mount via FA flange, LB foot, or an I or Y knuckle, and keep side load low on this long stroke with an external guide.
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 MAJ25X500-20S FAQ
Push is 245.3 N at 0.5 MPa and 343.4 N at 0.7 MPa; pull is 206.1 N at 0.5 MPa. The theoretical ceiling at 1.0 MPa is 50 kgf. Rod speed runs 30-800 mm/s across a 0.15-1.0 MPa (22-145 psi) supply, proof tested at 1.5 MPa (215 psi). Rod is 10 mm with an M10x1.25 thread; air ports are 1/8".
No. The MAJ uses fixed anti-impact bumper pads that soften the piston's arrival at each stroke end; they decelerate but cannot be tuned. If you need adjustable air cushioning on an adjustable-stroke cylinder, look at the AirTAC MACJ series. Also note the stop screw trims the extend stroke only - it is not a mid-stroke brake.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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