Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-40 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 SAIJ125AX700-40
The AirTAC SAIJ125X700-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 660-700mm usable travel window. Delivering 6136N of push force at 0.5MPa, it handles heavy-duty positioning while allowing precise end-stop tuning without external stops. The extruded aluminum barrel includes sensor grooves on both sides.
This variant utilizes an SUS420J2 stainless steel rod for enhanced corrosion resistance and ships without a magnet. The PT tapered port threads match the standard G1/2 fitting requirement for this bore size. The rear adjuster acts purely as a travel stop to fine-tune deceleration, not as a load lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-40 |
|---|---|
| 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 SAIJ125AX700-40
| 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 SAIJ125AX700-40 Is Used
Product Size Changeovers
Dial in the 660-700mm travel window during format changes on packaging lines, using the rear stopper to set new end positions without mechanical rebuilds.
Heavy Fixture Positioning
Leverage the 6136N push force at 0.5MPa to move heavy machining fixtures, relying on the fine-tuned stopper to guarantee precise placement.
Commissioning Calibration
Trim the effective stroke by up to 40mm during machine setup to perfect the deceleration point and avoid hard mechanical crashes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX700-40 the Right Cylinder?
Choose this 125mm bore when 80mm cylinders (providing 2513N push at 0.5MPa) lack the thrust for moving heavy fixtures, but a 160mm bore is physically excessive. The 40mm adjustment range is ideal for product-size changeovers, letting operators dial in the exact 660-700mm end position without swapping hardware. For applications requiring load holding without live air pressure, select a SAIL or BSAI cylinder instead, as this rear stopper cannot hold loads unpowered.
When replacing an ISO 15552 cylinder, match the 125mm bore, 700mm stroke, 40mm adjustment, PT port threads, and mounting style. Available mountings are Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke is 700mm, the 32mm rod and M27x2 thread still require an external guide to prevent excessive side-loading on the unsupported length.
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 SAIJ125AX700-40 FAQ
At 0.5MPa operating pressure, it provides 6136N of push force and 5734N of pull force. At 0.7MPa, the push force increases to 8590N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 700mm nominal stroke by up to 40mm, resulting in a usable travel window of 660-700mm. It sets the end position but does not lock the load.
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Standard models usually ship in 3-4 days.
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