Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 175mm 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
- Stroke175 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-30S
The AirTAC SAIJ125X175-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 145-175 mm. It delivers 6136 N of push force and 5734 N of pull force at 0.5 MPa, making it suitable for heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides, and the integrated -S magnet operates directly with AirTAC CMSE reed and DMSE electronic solid-state switches.
This model uses a carbon steel piston rod with an M27x2 thread and a PT tapered G1/2 port. The rear adjuster acts as a mechanical stop to fine-tune the retract end position during commissioning without swapping components. It is not a locking mechanism, so load holding without live air requires a SAIL or BSAI variant. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 175 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 SAIJ125X175-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×175 | 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 SAIJ125X175-30S Is Used
Heavy-Duty Machining Stops
Dial in the exact 145-175 mm retract position for large metalwork fixtures, ensuring precise clamping without remounting the entire actuator.
Product Changeover Diverters
Quickly adjust the stroke by up to 30 mm on packaging lines to accommodate different carton sizes on the fly.
Variable End-Position Pressing
Fine-tune the final pressing depth of heavy components at commissioning, relying on the 6136 N thrust to seat parts securely.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-30S the Right Cylinder?
Select this 125 mm bore cylinder when a 100 mm bore (offering 3927 N push at 0.5 MPa) lacks the necessary thrust, but stepping up to a 160 mm bore (10053 N push) would be excessive. The 30 mm adjustment range is ideal for machinery requiring variable end-stops during product changeovers, replacing the need for fixed-stroke SAI cylinders and external physical stops. To match this ISO 15552 footprint exactly, confirm the 175 mm stroke, 30 mm adjuster, PT port thread, and -S magnet requirement.
With a 175 mm stroke, the M27x2 carbon steel rod handles high side loads well, but an external guide rail is still recommended for heavy off-center loads. The operating speed ranges from 30-500 mm/s, supported by 40 mm variable air cushions at both ends to absorb kinetic energy.
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 SAIJ125X175-30S 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 the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear mechanical adjuster allows you to shorten the nominal 175 mm stroke by up to 30 mm, creating a usable travel window of 145-175 mm. This stopper fine-tunes the end position but does not lock the load without live air pressure.
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