Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 90mm 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
- Stroke90 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-75S
The AirTAC SAIJ125X90-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 6136N of push force at 0.5 MPa. It features a SUS420J2 stainless steel rod (code A) for enhanced corrosion resistance and PT tapered ports. The integrated magnet (-S) enables precise position detection with AirTAC CMSE reed or DMSE electronic solid-state sensors.
With a 90mm nominal stroke and a 75mm adjustment code, this model provides a highly flexible usable travel window of 15-90mm. This wide tuning range allows operators to dial in exact end positions during commissioning or product changeovers without swapping the cylinder or adding external stops. The rear adjuster functions strictly as a travel stop for deceleration alongside the standard air cushions, not as a lock to hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 90 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 SAIJ125AX90-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×90 | 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 SAIJ125AX90-75S Is Used
Variable End-Stop Tuning
Ideal for assembly stations requiring frequent reconfiguration of the end position, using the 75mm adjustment screw to shift the 90mm stroke window between 15mm and 90mm without changing hardware.
Product Size Changeover
Perfect for packaging lines handling varied product dimensions, allowing operators to quickly dial in the exact stroke length needed for different formats during line changeovers.
Heavy-Duty Positioning
Delivers 6136N of thrust at 0.5 MPa for robust clamping or pressing tasks, while the SUS420J2 stainless rod withstands harsh industrial environments.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX90-75S the Right Cylinder?
Choose this 125mm bore when an application requires substantial thrust, stepping up from a 100mm bore that provides 3927N push force at 0.5 MPa. The 75mm adjustment range is exceptionally broad, making this SKU ideal for machines processing multiple product sizes where the end-stop must frequently shift by tens of millimeters. For load-holding without continuous air pressure, an external rod lock or a related SAIL pneumatic lock cylinder is required, as the SAIJ adjuster only limits travel.
To match this exact configuration for an ISO 15552 replacement, verify the 125mm bore, 90mm stroke, 75mm adjustment, PT port threads, and the -S magnet option. Mounting choices are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets. The 32mm rod and M27x2 thread provide robust joint strength, though any long unsupported stroke still necessitates an external guide to prevent side-loading damage.
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 SAIJ125AX90-75S FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. It can reach a maximum push force of 11045N at 0.9 MPa.
The rear adjuster acts as a mechanical stop that shortens the effective travel. With a 90mm nominal stroke and a 75mm adjustment range, you can tune the usable stroke anywhere within a 15-90mm window. It functions as a travel stop, not a load-holding lock.
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