Airtac SAIJ125 Adjustable Cylinder SAIJ125BX150-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX150-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 150mm 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
- Stroke150 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 SAIJ125BX150-75
The AirTAC SAIJ125X150-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 8590 N of push force at 0.7 MPa. It features a robust 32 mm SUS304 stainless steel rod and PT tapered ports. By integrating an external stopper at the rear, this model allows you to fine-tune the end position during commissioning without swapping out the entire cylinder.
This specific SKU provides a usable travel window of 75 to 150 mm, enabling significant adaptability for product changeovers. The extruded aluminum barrel includes sensor grooves on both sides, and while this configuration omits the magnet, adding an -S variant enables compatibility with AirTAC CMSE reed and DMSE electronic sensors. It supports a standard speed range of 30-500 mm/s and utilizes a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX150-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX150-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAIJ125BX150-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SAIJ125BX150-75 Is Used
Variable End-Stop Tuning
Dial in the exact retraction point within the 75-150 mm window during machine commissioning to achieve precise end-position tuning without adding external stops.
Product Size Changeovers
Quickly adapt automated lines to new product dimensions by adjusting the rear stopper screw, minimizing downtime between production runs.
High-Force Positioning
Leverage the 8590 N push force at 0.7 MPa to move heavy fixtures into calibrated positions while benefiting from the 40 mm cushioning for smooth deceleration.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX150-75 the Right Cylinder?
Choose this 125 mm bore when an 80 mm bore (providing 3518 N push at 0.7 MPa) lacks the necessary thrust, but before stepping up to a 160 mm bore (14074 N at 0.7 MPa) which might be oversized. The adjustable 75 to 150 mm travel window is ideal for machines requiring variable end-stops or frequent product-size changeovers, offering far more setup flexibility than a fixed-stroke SAI cylinder.
Because the stroke is 150 mm, the 32 mm SUS304 rod handles side loads well, though any long unsupported travel still requires an external guide. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for dead-air load holding, consider an AirTAC SAIL or BSAI cylinder. This unit is dimensionally interchangeable per ISO 15552, using PT ports and omitting FB, CA, CB, and CR mounting brackets.
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 SAIJ125BX150-75 FAQ
At 0.7 MPa operating pressure, this 125 mm bore cylinder generates 8590 N of push force and 5734 N of pull force. It can reach a maximum push force of 11045 N at 0.9 MPa.
The rear adjuster acts as an external stopper that trims the effective travel. For this 150 mm nominal stroke model, you can shorten the stroke by up to 75 mm, creating a usable travel window of 75 to 150 mm.
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