Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 250mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-10
The AirTAC SAIJ125X250-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the end position during commissioning. With a nominal 250 mm stroke and a 10 mm adjustment range, it provides a precise 240-250 mm usable travel window without requiring external stops. It delivers a robust 6136 N push force at 0.5 MPa, making it suited for heavy-duty handling.
This model features a SUS420J2 stainless steel rod for superior corrosion resistance and a PT tapered port thread for a reliable seal. The extruded aluminum barrel includes sensor grooves on both sides, though no magnet is installed on this unit. The rear adjuster acts purely as a travel stop to set deceleration, not as a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-10 Is Used
Machine Changeover
Dial in the 240-250 mm travel window during product size changes without physically swapping cylinders or adding external stopper blocks.
Heavy Assembly Press
Leverage the 6136 N push force to seat heavy components, using the rear screw to fine-tune the final clamping position accurately.
End-Position Tuning
Trim the effective stroke by up to 10 mm during commissioning to synchronize multiple actuators perfectly on an automated line.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-10 the Right Cylinder?
Choose this 125 mm bore when your application requires the 6136 N thrust at 0.5 MPa, stepping up from a 100 mm bore that provides 3927 N. The adjustable stroke is ideal for product changeovers on a line, letting you dial in the exact end-stop without swapping the cylinder. For load-holding without live air pressure, select a SAIL or BSAI cylinder instead, as the SAIJ adjuster is only a stop.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 250 mm stroke, 10 mm adjustment, PT port, and mounting set. SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, omitting FB, CA, CB, and CR. Since the 250 mm stroke is under 300 mm, side-load risks are moderate, but external guides are still recommended for heavy lateral loads.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
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 Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-10 FAQ
It features a rear adjusting screw that lets you shorten the effective travel by up to 10 mm, creating a 240-250 mm usable stroke window. The adjuster acts as a mechanical stop to set the end position and does not lock the load without live air pressure.
At a 0.5 MPa operating pressure, the SAIJ125X250-10 generates a push force of 6136 N and a pull force of 5734 N. The maximum operating pressure is 1.0 MPa.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-10
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.