Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 75mm 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
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-30
The AirTAC SAIJ125X75-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 45 to 75 mm, letting you dial back the nominal 75 mm stroke by up to 30 mm during commissioning without adding external stops. It delivers a robust 8590 N push force at 0.7 MPa.
This 125 mm bore actuator uses a PT tapered port and operates at speeds of 30-500 mm/s. The carbon steel rod and M27x2 thread provide high structural rigidity, while the extruded aluminum barrel features sensor grooves on both sides for flexible switch mounting.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAIJ125X75-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SAIJ125X75-30 Is Used
Machine Setup Tuning
Fine-tune the 45-75 mm travel window during initial machine commissioning to dial in exact clamping positions without machining custom spacers.
Product Size Changeover
Quickly adapt the cylinder's extended end-stop on automated lines when handling different product lengths or heights.
Heavy Forming Operations
Leverage the 8590 N push force for pressing and forming tasks where the rear stopper sets the exact deformation depth.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X75-30 the Right Cylinder?
Choose this 125 mm bore when you need heavy thrust (8590 N at 0.7 MPa) that exceeds the 5497 N push capacity of the 100 mm version. The adjustable 45-75 mm window is ideal for product changeovers requiring precise end-position tuning. For a fixed end-stop without the adjuster, use the standard SAI cylinder. To replace an ISO 15552 cylinder, match the 125 mm bore, 75 mm stroke, 30 mm adjustment, PT port, and mounting style (Basic, FA, LB, TC, FTC, TCM1, or 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 SAIJ125X75-30 FAQ
The rear adjuster acts as a mechanical stop, allowing you to shorten the effective stroke from 75 mm down to as little as 45 mm. This creates a 30 mm adjustable travel window for fine-tuning end positions.
At 0.7 MPa operating pressure, the SAIJ125X75-30 provides 8590 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 11045 N of push force.
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