Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-30S 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 SAIJ125X90-30S
The AirTAC SAIJ125X90-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 60 to 90 mm. Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore unit handles heavy loads while allowing precise end-position tuning during commissioning. The PT tapered port and carbon steel rod ensure robust pneumatic connectivity and structural durability.
Because this configuration includes a magnet (-S), it directly supports AirTAC CMSE reed and DMSE electronic solid-state sensors housed within the dual-side extruded barrel grooves. The rear adjuster acts purely as a mechanical stop to trim the stroke without swapping cylinders, and the standard variable air cushions manage end-of-travel deceleration for moving masses.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-30S |
|---|---|
| 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 SAIJ125X90-30S
| 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 SAIJ125X90-30S Is Used
Product Size Changeovers
Dial in the 60-90 mm travel window on the fly to accommodate different product lengths without changing the cylinder or adding external stopper blocks.
Heavy Press Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy assemblies while fine-tuning the exact retraction point during machine commissioning.
Variable End-Stop Clamping
Secure varying workpiece sizes on an automated line by adjusting the rear stopper screw to set the precise clamping depth for each batch.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X90-30S the Right Cylinder?
Select this 125 mm bore cylinder when an application requires high thrust combined with variable end-stops, stepping up from a 100 mm bore that yields 3927 N at 0.5 MPa. The adjustable 60-90 mm travel window is ideal for product-size changeovers on a line, eliminating the need to bolt on external stops or purchase multiple fixed-stroke SAI cylinders. For mounting, SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets, omitting FB, CA, CB, and CR options.
To replace an existing ISO 15552 cylinder, match the 125 mm bore, 90 mm nominal stroke, 30 mm adjustment range, PT port thread, and -S magnet requirement. Remember that the rear adjuster and air cushions only set travel limits and deceleration; they do not hold the load without live air. For positive load-holding, integrate an external pilot-operated check valve or select an AirTAC SAIL or BSAI locking cylinder.
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 SAIJ125X90-30S 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 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to mechanically shorten the 90 mm nominal stroke, creating a usable travel window of 60 to 90 mm. This stopper sets the end position but does not lock the load without continuous air pressure.
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