Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 45mm 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
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-10
The AirTAC SAIJ125X45-10 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. Its integrated 10mm adjustment screw creates a 35-45mm usable travel window, allowing you to dial in the exact end position without adding external stops. The extruded aluminum barrel features sensor grooves on both sides, and the carbon steel rod provides robust durability for heavy loads.
This model utilizes a PT tapered G1/2 port and a 32mm rod with an M27x2 thread. The rear adjuster functions strictly as a travel stop to fine-tune deceleration, not as a lock, meaning live air is required to hold the load. It supports the standard SAIJ mounting set, including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 45 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 SAIJ125X45-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×45 | 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 SAIJ125X45-10 Is Used
Product Changeovers
Quickly adapt to varying package sizes on a packaging line by dialing the stroke back 10mm instead of repositioning cylinder mounts.
Machine Setup
Fine-tune the retract end-position during commissioning to achieve precise mechanical alignment without fabricating custom spacers.
Heavy Clamping
Leverage the 6136N push force at 0.5 MPa to secure heavy workpieces while using the adjustable stop to control clamp depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X45-10 the Right Cylinder?
Selecting this 125mm bore cylinder is ideal when your application demands high thrust but requires slight positional tuning at commissioning, stepping up from a 100mm bore that provides 3927N push force at 0.5 MPa. The adjustable stroke is perfect for product-size changeovers on a line, whereas a fixed SAI cylinder would require physical shimming. To match this ISO 15552 replacement exactly, verify the 45mm stroke, 10mm adjustment, PT port, and mounting style. Note that this SKU does not include a magnet; adding an -S suffix enables CMSE reed or DMSE electronic sensors.
Because the rear screw and air cushion only set the travel end, a plain SAIJ will not hold its load without live air. For load-holding without pneumatic pressure, consider the SAIL or BSAI series, or use an external rod lock. With a 45mm stroke, side-load risks are minimal, but always ensure the load is guided for optimal bearing life.
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 SAIJ125X45-10 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw allows you to shorten the 45mm nominal stroke by up to 10mm, creating a 35-45mm usable travel window. It acts as a mechanical stop for end-position tuning and is not a locking device.
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