Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-50 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 SAIJ125AX130-50
The AirTAC SAIJ125X130-50 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features an extruded aluminum barrel with sensor grooves on both sides and a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance. This model uses PT tapered port threads and operates at speeds of 30-500 mm/s.
With a 130 mm nominal stroke and a 50 mm adjustment range, this cylinder provides a usable travel window of 80-130 mm. This built-in rear stopper allows you to fine-tune the retract end position during commissioning or product changeovers without swapping the cylinder or adding external stops. The adjuster acts purely as a travel stop to set deceleration alongside the air cushions, not as a lock to hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-50 |
|---|---|
| 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 SAIJ125AX130-50
| 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 SAIJ125AX130-50 Is Used
Product Size Changeovers
Dial in the exact 80-130 mm retract position on packaging lines running varied container sizes without physically replacing the actuator.
Machine Setup Commissioning
Fine-tune the end-of-stroke stop during initial machinery commissioning to perfect tooling alignment while relying on the 6136N thrust.
Variable End-Stop Forming
Adjust the rear stopper on the fly for metal forming or pressing tasks that require different material penetration depths.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-50 the Right Cylinder?
Select this 125 mm bore cylinder when an application requires high thrust combined with variable end-stop positioning. If the 6136N push force at 0.5 MPa exceeds your needs, stepping down to a 100 mm bore yields 3927N; conversely, a 160 mm bore provides 10053N for heavier loads. The adjustable 80-130 mm travel window is ideal for lines running multiple product sizes, offering setup flexibility that a fixed-stroke SAI cylinder cannot match.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 130 mm stroke, 50 mm adjustment, PT port threads, and mounting style. SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because this unit lacks a magnet (-S), it cannot host CMSE reed or DMSE electronic sensors without modification. For load-holding requirements, note that this cylinder needs live air; an external rod lock or a SAIL pneumatic lock cylinder is required.
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 SAIJ125AX130-50 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjuster acts as an external stopper, allowing you to shorten the 130 mm nominal stroke by up to 50 mm. This creates an adjustable 80-130 mm travel window for fine-tuning the end position without adding external stops.
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