Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-75 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 SAIJ125AX260-75
The AirTAC SAIJ125X260-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that permits the effective travel to be trimmed by up to 75 mm. This yields a usable window of 185 to 260 mm, allowing precise end-position tuning at commissioning without swapping out the unit. It delivers 6136 N of push force at 0.5 MPa and integrates a robust 32 mm SUS420J2 stainless steel rod with an M27x2 thread, offering high resistance to side loading.
This model uses a PT tapered G1/2 port and achieves a maximum operating speed of 30-500 mm/s. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting the FB, CA, CB, and CR options. The rear adjustment mechanism acts purely as a travel stop to set deceleration, meaning it will not hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-75 |
|---|---|
| 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 SAIJ125AX260-75
| 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 SAIJ125AX260-75 Is Used
Variable End-Stop Tuning
Dial in the exact 185 to 260 mm travel window during machine setup to accommodate different product sizes without adding external stops.
Heavy Tooling Positioning
Leverage the 6136 N push force to move heavy fixtures into precise alignment, relying on the 32 mm stainless steel rod for structural integrity.
Commissioning Calibration
Fine-tune the retract end-position on the fly during initial commissioning, using the rear adjuster to perfect the deceleration point.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX260-75 the Right Cylinder?
Selecting this 125 mm bore over a smaller 100 mm option steps the thrust up from 3927 N to 6136 N at 0.5 MPa, providing the necessary force for heavier tooling. An adjustable stroke is chosen over a fixed SAI cylinder when a machine requires variable end-stops or fine-tuning during product changeovers. To match this exact ISO 15552 replacement, verify the 260 mm stroke, 75 mm adjustment range, PT G1/2 port, and the SUS420J2 rod material. For any stroke of 260 mm or more, an external guide is recommended to prevent excessive rod wear. If true load-holding without live air is required, consider the SAIL or BSAI series instead.
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 SAIJ125AX260-75 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can reach up to 1251 kgf at a maximum 1.0 MPa operating pressure.
The rear adjuster acts as a mechanical stop that lets you shorten the 260 mm nominal stroke by up to 75 mm, creating a usable travel window of 185 to 260 mm. It only sets the travel end and does not lock the load without live air pressure.
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