Airtac SAIJ125 Adjustable Cylinder SAIJ125BX325-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX325-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 325mm 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
- Stroke325 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX325-30
The AirTAC SAIJ125X325-30 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the effective travel down from a 325 mm nominal stroke to a 295 mm minimum. This creates a precise 295-325 mm usable window, ideal for dialing in end positions during commissioning without external stops. It delivers a robust 6136 N push force at 0.5 MPa and features a SUS304 stainless steel rod (code B) for superior corrosion resistance.
This model utilizes PT tapered port threads (G1/2) and operates at speeds between 30-500 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, though this specific SKU omits the magnet, meaning CMSE or DMSE electronic sensors cannot be used without modification. The rear adjustment screw acts purely as a travel stop to set deceleration and end-position, not as a locking device.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX325-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX325-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 325 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 SAIJ125BX325-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×325 | 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 SAIJ125BX325-30 Is Used
Product Changeover
Quickly dial in the 295-325 mm travel window during format size changes on packaging lines without replacing the cylinder.
End-Stop Tuning
Fine-tune the final retract position during machine commissioning to avoid mechanical crashes and ensure precise placement.
Heavy Forming Press
Leverage the 6136 N push force at 0.5 MPa for heavy-duty pressing operations requiring exact, adjustable end positions.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX325-30 the Right Cylinder?
Choose this 125 mm bore when a 63 mm cylinder (providing 1559 N push at 0.5 MPa) is insufficient, but an 80 mm bore (2513 N) cannot meet your force requirements. The adjustable 295-325 mm window is perfect for product-size changeovers on a line, allowing operators to reposition the end-stop quickly rather than swapping out a fixed-stroke SAI cylinder. Because the nominal stroke is 325 mm, an external guide is recommended to prevent excessive side-loading on the 32 mm rod.
To match this cylinder for an ISO 15552 replacement, confirm the 125 mm bore, 325 mm stroke, 30 mm adjustment range, PT port threads, and the absence of a magnet. Remember that the rear adjuster cannot hold a load without live air; for true load-holding, consider the SAIL or BSAI series instead. Mounting options are limited to 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 SAIJ125BX325-30 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the 325 mm nominal stroke by up to 30 mm, providing a usable travel range of 295-325 mm. It functions as a mechanical stop and does not lock the load without continuous air pressure.
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Covers non-human-caused product damage.
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