Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-30S
The AirTAC SAIJ125X145-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the nominal 145 mm stroke by up to 30 mm. This yields a precise usable travel window of 115-145 mm, letting you fine-tune the retract end-position at commissioning without adding bulky external stops. In the 125 mm bore class, it delivers substantial thrust—generating 8590 N of push force at 0.7 MPa and reaching 11045 N at 0.9 MPa.
Built for demanding environments, this variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance. It includes a magnet (-S) for position sensing, compatible with AirTAC CMSE reed switches and DMSE electronic sensors that mount directly into the dual-side sensor grooves on the extruded aluminum barrel. The fluid porting utilizes PT tapered threads (G1/2), and the standard air cushions at both ends help decelerate the load smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 145 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 SAIJ125AX145-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×145 | 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 SAIJ125AX145-30S Is Used
Machine Changeover
Dial in the exact 115-145 mm retract position during product size changeovers without swapping out the physical cylinder.
Sensor-Driven Positioning
Pairs with DMSE solid-state sensors in the integrated barrel grooves to confirm the adjusted end-stop on automated assembly lines.
High-Force End Tuning
Provides up to 11045 N of push force at 0.9 MPa while allowing 30 mm of rear-end travel adjustment for heavy-duty press fits.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-30S the Right Cylinder?
Choose this 125 mm bore when 100 mm (5497 N push at 0.5 MPa) is insufficient but 160 mm (14074 N push at 0.5 MPa) would overcomplicate your fixture. The adjustable -30 mm stroke is ideal for product changeovers on a line where end-of-stroke targets shift by a few centimeters, preventing the need to swap out the entire cylinder. To match this ISO 15552 footprint, specify: 125 mm bore, 145 mm stroke, -30 adjustment, PT G1/2 ports, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting, and a -S magnet.
Because the 145 mm stroke is under the 300 mm threshold, side-load stress is manageable, though the robust 32 mm rod and M27x2 thread handle greater off-center loads. Remember that the rear adjuster acts strictly as a travel stop, not a lock; this SAIJ cylinder cannot hold a load without live air pressure. For fail-safe load holding, consider an AirTAC SAIL or BSAI clamp-lock cylinder instead.
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 SAIJ125AX145-30S FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 30 mm, creating a usable travel window of 115-145 mm. It acts as a mechanical stop to set the end position and does not lock the load without live air.
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
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