Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 130mm 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
- Stroke130 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-40S
The AirTAC SAIJ125X130-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 90 to 130 mm for precise end-position tuning. Operating at 0.15-1.0 MPa, it delivers a 0.5 MPa push force of 6136 N and a pull force of 5734 N. The integrated magnet (-S) enables direct mounting of CMSE reed and DMSE electronic sensors along the dual-side barrel grooves.
This 125 mm bore unit utilizes a robust 32 mm carbon steel piston rod with an M27x2 thread, engineered to handle substantial side loads. It features PT tapered port threads and reaches an operating speed of 30-500 mm/s. The external adjusting screw acts purely as a mechanical stop to trim the retract stroke without requiring cylinder replacement or external stops.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 130 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 SAIJ125X130-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×130 | 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 SAIJ125X130-40S Is Used
Product Changeover
Dial in the 90-130 mm travel window during line changeovers to accommodate varying product dimensions without changing the cylinder.
End-Position Tuning
Fine-tune the retract end-stop during machine commissioning to achieve exact mechanical positioning without adding external spacers.
Assembly Pressing
Leverage the 6136 N thrust at 0.5 MPa for pressing operations while retaining the flexibility to adjust the stroke length on the fly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X130-40S the Right Cylinder?
Choose this adjustable SAIJ model when your application requires variable end-stop positions or frequent product changeovers, avoiding the need to physically swap out a fixed-stroke SAI cylinder. If your force requirements are lower, stepping down to an 80 mm bore yields a 2513 N push force at 0.5 MPa, whereas a 160 mm bore provides 10053 N for heavier loads. Because the 130 mm stroke is relatively short, side-load concerns are minimal, but always verify rod deflection on unsupported loads.
For exact ISO 15552 mounting-interface replacements, match the 125 mm bore, 130 mm nominal stroke, 40 mm adjustment range, PT port threads, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options. Remember that the rear adjuster is a travel stop, not a locking device; it cannot hold a load without continuous air pressure. For true fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ125X130-40S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder provides a push force of 6136 N and a pull force of 5734 N. The maximum operating pressure is 1.0 MPa.
The rear adjuster screw allows you to mechanically shorten the effective stroke by up to 40 mm from the 130 mm nominal length, creating a 90-130 mm usable travel window. It functions as a travel stop and requires live air to hold the load.
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