Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-75S 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 SAIJ125AX130-75S
The AirTAC SAIJ125X130-75-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 6136N of push force at 0.5MPa and provides a usable travel window of 55-130mm, allowing you to dial back the 130mm nominal stroke by up to 75mm during machine setup.
This unit includes a SUS420J2 stainless steel rod, PT tapered port threads, and a magnet for position sensing. The rear adjuster acts purely as an external stop to fine-tune the retract end position without adding external stops, while the shared sensor grooves on both sides of the extruded aluminum barrel accept CMSE reed or DMSE electronic switches.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-75S |
|---|---|
| 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 SAIJ125AX130-75S
| 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 SAIJ125AX130-75S Is Used
Machine Changeover
Quickly adjust the retract end-position by up to 75mm when switching product sizes on a packaging line, avoiding physical cylinder replacement.
End-Position Tuning
Fine-tune the 130mm stroke to dial in exact stopping points during machine commissioning without adding bulky external mechanical stops.
Variable Assembly Stops
Set different stroke lengths on the fly for multi-model assembly fixtures, leveraging the 6136N force to handle heavy workholding tasks.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX130-75S the Right Cylinder?
Choose this 125mm bore when a smaller 100mm cylinder (offering 3927N push at 0.5MPa) lacks the necessary thrust, but a larger 160mm bore is excessive. The adjustable stroke is selected for applications requiring variable end-stops or commissioning fine-tuning without swapping the cylinder. Since this is a 130mm stroke, side-load is less of a concern than with longer strokes, but an external guide is still recommended for heavy lateral loads.
For an exact ISO 15552 replacement, match the 125mm bore, 130mm stroke, 75mm adjustment, PT ports, and the -S magnet. Note that the rear adjuster is a travel stop, not a lock; the SAIJ does not hold loads without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
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 SAIJ125AX130-75S FAQ
At 0.5MPa it provides 6136N of push force and 5734N of pull force. At its maximum operating pressure of 1.0MPa, it delivers up to 1251 kgf of push force.
The 130mm nominal stroke can be adjusted down by up to 75mm via a rear screw, giving an effective travel window of 55-130mm. The adjuster acts as a mechanical stop and does not lock the load without live air pressure.
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