Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-20S 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 SAIJ125AX130-20S
The AirTAC SAIJ125X130-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 130 mm nominal stroke by up to 20 mm for a usable travel window of 110-130 mm. This fine-tuning capability is ideal for product changeovers, letting you set exact end positions at commissioning without swapping the cylinder or adding external stops. It delivers substantial thrust, providing 8590 N of push force at 0.7 MPa.
This SKU features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and includes a magnet (-S) for position sensing with AirTAC CMSE reed and DMSE electronic switches. The PT tapered ports and extruded aluminum barrel with dual sensor grooves ensure standard ISO 15552 mounting interchangeability. The rear adjuster acts solely as a travel stop to set the end position and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-20S |
|---|---|
| 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 SAIJ125AX130-20S
| 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 SAIJ125AX130-20S Is Used
Product Changeover
Dial in the 110-130 mm travel window during format changes without physically swapping out the actuator or adding external stopper blocks.
End-Position Tuning
Fine-tune the exact retract position at machine commissioning using the rear adjuster screw to perfect product placement.
High-Force Clamping
Leverage the 8590 N push force at 0.7 MPa to secure heavy workpieces while using the adjuster to set the precise clamping depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-20S the Right Cylinder?
Choose this 125 mm bore when an application requires high force, generating 8590 N push at 0.7 MPa, but needs less travel than the 160 mm bore class which offers 14074 N push. The adjustable stroke is selected over a fixed SAI cylinder when a machine requires variable end-stops or precise end-position tuning during setup. To replace this ISO 15552 cylinder, match the 125 mm bore, 130 mm stroke, 20 mm adjustment, PT ports, SUS420J2 rod, and -S magnet.
Because the stroke is 130 mm, side-loading is less of a concern, but the 32 mm rod and M27x2 thread handle substantial loads well. For applications that require true load-holding without continuous live air, note that this cylinder's adjuster is only a stop; consider an AirTAC SAIL or BSAI series instead. 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 SAIJ125AX130-20S FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke by up to 20 mm, providing an adjustable travel window of 110 to 130 mm. It sets the travel end but does not lock or hold the load without live air pressure.
At 0.7 MPa, the SAIJ125X130-20-S provides 8590 N of push force and 7590 N of pull force. It operates at speeds between 30-500 mm/s.
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