Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-75
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-75 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 SAIJ125AX700-75
The AirTAC SAIJ125X700-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 625 to 700 mm, enabling precise end-position tuning at commissioning without swapping the barrel or adding external stops. Built with a SUS420J2 stainless steel rod (option A), it delivers a robust 6136 N push force at 0.5 MPa and 8590 N at 0.7 MPa.
This 125 mm bore unit uses PT tapered G1/2 ports and operates at speeds of 30-500 mm/s. The extruded aluminum barrel includes dual sensor grooves, though this specific SKU omits the magnet for switches. The mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 attachments, deliberately omitting FB, CA, CB, and CR brackets.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-75 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-75 |
|---|---|
| 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 SAIJ125AX700-75
| 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 SAIJ125AX700-75 Is Used
Machine Changeover
Dial in the retract position by up to 75 mm when switching product sizes on a packaging line, eliminating the need to physically swap out cylinders.
End-Stop Tuning
Fine-tune the final end-of-stroke position during machine commissioning to perfect part ejection or forming distances without external stopper blocks.
Heavy Forming Press
Leverage the 6136 N push force at 0.5 MPa for high-load forming or clamping tasks where the exact travel distance must be adjusted per batch.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-75 the Right Cylinder?
Select this 125 mm bore cylinder when an application requires high thrust combined with variable end-stops for product changeovers. If you need less force, stepping down to a 100 mm bore yields 3927 N push at 0.5 MPa. Choose the SAIJ adjustable variant over a fixed SAI model when you need to dial in the retract position by up to 75 mm on the fly.
Because the nominal stroke is 700 mm, an external guide rail is recommended to manage side loads and prevent rod deflection over this long travel distance. Note that the rear adjuster acts strictly as a travel stop and does not lock the load; for position holding without live air pressure, consider an AirTAC SAIL or BSAI cylinder. To match this ISO 15552 footprint, specify a 125 mm bore, 700 mm stroke, 75 mm adjustment, PT G1/2 port, and your required mounting kit.
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 SAIJ125AX700-75 FAQ
The rear adjuster screw acts as a mechanical stop that trims the effective travel. For this model, the 700 mm nominal stroke can be shortened by up to 75 mm, yielding an adjustable usable travel window of 625 to 700 mm. The adjuster only sets the end position; it does not lock the load without live air pressure.
At a 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 8590 N.
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