Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-40
The AirTAC SAIJ125X350-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 350 mm travel by up to 40 mm. This creates a precise 310-350 mm usable stroke window, enabling fine end-position tuning at commissioning without swapping the hardware. It delivers a robust 6136 N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks.
This variant features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides. Because the 350 mm stroke is substantial for a 125 mm bore, an external guide is recommended to manage side loading and protect the rod seals over long unsupported travels.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 350 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 SAIJ125AX350-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×350 | 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 SAIJ125AX350-40 Is Used
Variable End-Stop Machining
Fine-tune the 310-350 mm retraction point during machine setup to accommodate different part lengths without adding external stopper blocks.
Product Changeover Diverter
Quickly adjust the stroke end-position on a packaging line to handle varying package sizes on the fly, reducing downtime between production runs.
Heavy-Duty Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or fixtures, dialing in the exact stopping distance during commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX350-40 the Right Cylinder?
Choose this 125 mm bore when you need substantial thrust—6136 N push at 0.5 MPa—combined with on-the-fly stroke adjustment. If your application requires less force, stepping down to a 100 mm bore provides 3927 N push at 0.5 MPa. The rear adjuster acts purely as a travel stop to set the retraction end position; it is not a locking device. If your machine requires true load-holding without live air pressure, consider an AirTAC SAIL or BSAI cylinder instead.
To match this ISO 15552 interchangeable cylinder exactly, specify the 125 mm bore, 350 mm nominal stroke, 40 mm adjustment range, PT port threads, and your required mounting option from the SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2. Note that FB, CA, CB, and CR mounts are omitted from this adjustable series.
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 SAIJ125AX350-40 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the effective travel from the nominal 350 mm down to 310 mm. This provides a 310-350 mm usable stroke window for fine-tuning the end position without changing the cylinder.
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 SAIJ125AX350-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.