Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 325mm 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
- Stroke325 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-30S
The AirTAC SAIJ125X325-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 295 to 325 mm. Built with an extruded aluminum barrel, it delivers robust force, generating 6136 N of pull force and 8590 N of push force at 0.5 MPa. This makes it well-suited for heavy-duty positioning tasks.
It includes a standard carbon steel piston rod and a magnetic piston (-S) for direct compatibility with AirTAC CMSE reed and DMSE electronic solid-state sensors. The rear adjustment mechanism acts purely as a mechanical stop to fine-tune end positions at commissioning; it is not a locking device and will not hold a load without continuous air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 325 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 SAIJ125X325-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×325 | 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 SAIJ125X325-30S Is Used
Heavy Pressing Operations
Delivers up to 11045 N of push force at 0.9 MPa for securely seating large bearings or heavy components during automated assembly.
Product Changeovers
The 30 mm rear adjuster allows operators to quickly shift the effective stroke from 325 mm down to 295 mm when switching between different product sizes on the same conveyor line.
Pallet Positioning
Provides robust and precise end-stop tuning for heavy pallet handling systems, ensuring exact alignment before secondary machining or packaging processes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X325-30S the Right Cylinder?
Select this 125 mm bore cylinder when an application requires high thrust that exceeds the 3927 N push force of a 100 mm bore at 0.5 MPa, but does not demand the massive 10053 N output of a 160 mm unit. The adjustable 295 to 325 mm travel window is ideal for product-size changeovers on a line, allowing operators to dial in the exact end-stop without swapping out the entire cylinder or adding external shims.
Because the 325 mm stroke is substantial and the 32 mm rod is heavily loaded, an external guide rail is recommended to prevent excessive side-loading on the front cover. For load-holding requirements without live air pressure, this standard SAIJ adjuster is insufficient; consider the SAIL (air-released lock) or BSAI (clamp-lock) variants instead. This SKU features a PT tapered port thread and supports SAIJ mounting options including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ125X325-30S FAQ
At 0.5 MPa, it provides 8590 N of push force and 6136 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
A rear stopper screw allows you to shorten the effective travel from the nominal 325 mm down to a minimum of 295 mm, creating a 30 mm adjustable window for fine-tuning the end position during machine setup.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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