Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 700mm 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
- Stroke700 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-75
The AirTAC SAIJ125X700-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 6136N pull force at 0.5 MPa, making it well-suited for heavy-duty positioning tasks.
This specific SKU provides a 625-700 mm usable travel window, allowing you to dial back the nominal 700 mm stroke by up to 75 mm. The extruded aluminum barrel includes sensor grooves on both sides, and the carbon steel rod uses a PT tapered port thread for secure pneumatic connections.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 700 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 SAIJ125X700-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×700 | 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 SAIJ125X700-75 Is Used
Variable End-Stop Tuning
Dial in the exact retract distance within the 625-700 mm window during commissioning to accommodate different product sizes without machining new hard stops.
Heavy-Duty Changeover
Adjust the stroke on automated assembly lines when switching between product variants, relying on the 6136N pull force to move substantial jigs.
Long-Stroke Positioning
Execute long-travel material handling tasks where the 700 mm movement requires precise end-of-travel calibration to prevent impact damage.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X700-75 the Right Cylinder?
Choose this 125 mm bore when you need higher thrust than the 80 mm option (which provides 2268N pull at 0.5 MPa) but want to avoid the larger footprint of a 160 mm cylinder. The 75 mm rear adjustment screw is ideal for fine-tuning end positions during machine setup or product changeovers without swapping hardware.
Because the nominal stroke is 700 mm, the M27x2 piston rod is highly susceptible to side-loading; an external guide rail is strongly recommended to prevent premature seal wear. Remember that the rear adjuster acts only as a mechanical stop to decelerate travel—it does not hold the load without live air. For static load-holding, use an external rod lock or explore the SAIL or BSAI series. Mounting options include 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 SAIJ125X700-75 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136N of pull force and 8590N of push force. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster allows you to mechanically shorten the effective stroke from 700 mm down to 625 mm. This creates a 75 mm tuning window for end-position calibration without needing to replace the cylinder or add external stops.
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