Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-40S
The AirTAC SAIJ125X290-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 250-290 mm usable travel window, allowing you to trim the effective stroke by up to 40 mm during commissioning without swapping the cylinder. Built with a SUS420J2 stainless steel rod (code A), it delivers 6136 N of push force at 0.5 MPa.
This model includes a magnet (-S) for position sensing and operates at speeds of 30-500 mm/s. The rear adjuster acts purely as a mechanical stop to fine-tune the end position; it does not lock the load without live air. For load-holding requirements, consider the SAIL or BSAI variants instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 290 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 SAIJ125AX290-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×290 | 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 SAIJ125AX290-40S Is Used
Product Changeovers
Dial in the 250-290 mm travel window during format changes without physically swapping cylinders or reworking machine stops.
Heavy Forming Ends
Provides 6136 N of push force at 0.5 MPa for pressing or forming applications requiring precise end-position tuning.
Long-Stroke Guiding
Handles 290 mm strokes in material handling setups, provided external guides support the load to prevent rod side-load damage.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX290-40S the Right Cylinder?
Choose this 125 mm bore when you need substantial thrust, such as 6136 N push at 0.5 MPa, but want to avoid stepping up to the 160 mm bore which offers 10053 N. The adjustable stroke is ideal for product changeovers on a line, letting you dial in the exact end-stop without adding external stops. If you need a fixed end position, the standard SAI cylinder is a simpler alternative.
To replace an ISO 15552 cylinder, match the 125 mm bore, 290 mm stroke, 40 mm adjustment, PT tapered ports, and the -S magnet. Because the 290 mm stroke is substantial, ensure external guiding is used to handle side loads, as even the 32 mm rod can be deflected under high off-center forces. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125AX290-40S FAQ
The rear adjuster allows you to mechanically shorten the stroke by up to 40 mm, creating a usable travel window of 250-290 mm. It functions as a hard stop for end-position tuning and does not lock the load pneumatically.
At 0.5 MPa operating pressure, it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
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 SAIJ125AX290-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.