Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 260mm 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
- Stroke260 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-50S
The AirTAC SAIJ125X260-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers substantial thrust, generating 8590N of push force at 0.7 MPa, making it suitable for heavy-duty operations. The integrated -S magnet enables position feedback via AirTAC CMSE reed and DMSE electronic sensors mounted in the dual-side sensor grooves.
This model features a 260 mm nominal stroke that can be fine-tuned down by up to 50 mm, creating a usable travel window of 210-260 mm. This built-in adjustability allows you to dial in the exact retract end-position during commissioning or product changeovers without swapping the cylinder. The extruded aluminum barrel uses a PT tapered port (G1/2) and a robust 32 mm carbon steel rod with an M27x2 thread, providing high structural rigidity.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 260 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 SAIJ125X260-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×260 | 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 SAIJ125X260-50S Is Used
Machine Changeover
Rapidly adjust the 210-260 mm travel window during product size changeovers on a packaging line without replacing the cylinder or adding external mechanical stops.
Heavy Pressing Operations
Leverage the 8590N push force at 0.7 MPa for heavy pressing or clamping tasks, using the rear screw to fine-tune the exact bottoming position during commissioning.
Automated Assembly Stations
Utilize the dual sensor grooves with CMSE and DMSE switches to confirm part presence and end-of-stroke positioning in high-force automated assembly machinery.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X260-50S the Right Cylinder?
Select this 125 mm bore cylinder when an application demands high force that a 100 mm bore (providing 5497N push at 0.7 MPa) cannot handle, but a 160 mm bore would be physically excessive. The adjustable 210-260 mm travel window is ideal for machinery requiring precise end-stop tuning during setup or when accommodating slight product size variations on a line. It utilizes a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets.
Because the stroke is 260 mm, the 32 mm rod and M27x2 thread provide excellent side-load resistance, though an external guide is still recommended for heavy unsupported loads. Remember that the rear adjuster acts only as a travel stop and the air cushion provides deceleration; neither will hold the load without live air. For true load-holding without pneumatic pressure, consider an AirTAC SAIL or BSAI cylinder. To match this ISO 15552 interchangeable cylinder exactly, specify the 125 mm bore, 260 mm stroke, 50 mm adjustment, PT port, and -S magnet.
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 SAIJ125X260-50S FAQ
At a standard operating pressure of 0.7 MPa, this 125 mm bore cylinder provides 8590N of push force and 5734N of pull force. At 0.9 MPa, the push force increases to 11045N.
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the effective stroke from its 260 mm nominal length by up to 50 mm, resulting in a usable travel window of 210-260 mm. It sets the end position but does not lock the load without live air pressure.
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