Airtac SAIJ125 Adjustable Cylinder SAIJ125AX40-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX40-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 40mm 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
- Stroke40 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX40-10S
The AirTAC SAIJ125X40-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 30 to 40 mm for precise end-position tuning. It delivers a robust 6136 N push force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. This variant features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors.
The integrated adjusting screw acts purely as a mechanical stop to trim the retract stroke and must not be confused with a locking device. For applications requiring load holding without live air pressure, an external pilot-operated check valve or an AirTAC SAIL lock cylinder is required. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX40-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX40-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 40 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 SAIJ125AX40-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×40 | 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 SAIJ125AX40-10S Is Used
Heavy-Duty End-Stop Tuning
Dial in the exact 30-40 mm retract position on large presses or heavy fixtures during commissioning without swapping out the entire actuator.
Product Size Changeover
Quickly adjust the stroke end by up to 10 mm to accommodate slightly different product dimensions on an automated packaging line.
Clamp Position Calibration
Fine-tune the clamping depth on heavy industrial machinery, relying on the 6136 N push force at 0.5 MPa to secure rigid workpieces.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX40-10S the Right Cylinder?
Select this 125 mm bore cylinder when a machine changeover requires exact end-stop tuning within a 30-40 mm window without adding external physical stops. It delivers 6136 N of push thrust at 0.5 MPa; if your application requires less force, stepping down to an 80 mm bore provides 2513 N. Conversely, if higher forces are needed, a 160 mm bore yields 10053 N at the same pressure. This model operates at speeds of 30-500 mm/s.
When specifying a replacement, match the 125 mm bore, 40 mm nominal stroke, 10 mm adjustment range, PT tapered port threads, and the -S magnet option. Because the 32 mm rod and M27x2 thread handle substantial loads, ensure your mounting choice from the available SAIJ bracket set properly supports the rod end to minimize side loading.
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 SAIJ125AX40-10S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum operating pressure of 1.0 MPa, it achieves a maximum push force of 1251 kgf.
The rear adjuster screw allows you to shorten the 40 mm nominal stroke, creating a usable travel window of 30 to 40 mm. This mechanical stopper fine-tunes the end position but does not lock the load; air pressure must be maintained to hold position.
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