Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-30 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 SAIJ125X175-30
The AirTAC SAIJ125X175-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the retract end position. With a nominal 175 mm stroke and a 30 mm adjustment range, it provides a usable travel window of 145-175 mm to dial in exact stopping points during commissioning without adding external stops. It delivers robust thrust, pushing 6136 N and pulling 5734 N at 0.5 MPa.
This bore size features a 32 mm carbon steel rod with an M27x2 thread, paired with 40 mm variable air cushions at both ends to manage kinetic energy. The extruded aluminum barrel includes sensor grooves on both sides. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR variants.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-30 |
|---|---|
| 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 SAIJ125X175-30
| 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 SAIJ125X175-30 Is Used
Machine Changeover
Quickly adjust the 145-175 mm travel window during product size changes without physically replacing the cylinder or bolting on external stoppers.
End-Position Tuning
Fine-tune the retract end position at commissioning to achieve precise mechanical alignment, absorbing minor mechanical tolerances in the fixture.
Heavy Forming Operations
Leverage the 6136 N push force at 0.5 MPa for pressing or forming tasks where the exact bottoming position needs minor field adjustment.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X175-30 the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore (offering 3927 N push force at 0.5 MPa) cannot provide enough thrust, but you want to avoid stepping up to a 160 mm bore that outputs 10053 N. The adjustable stroke is ideal for product changeovers on a line, letting you shift the end-stop by up to 30 mm rather than swapping the entire cylinder for a fixed-stroke SAI model. The PT tapered port matches standard pneumatic fittings.
Because the stroke is 175 mm, side-load risks are moderate, but ensure adequate external guiding for heavy loads. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for fail-safe load holding without pressure, consider an AirTAC SAIL or BSAI cylinder. This unit has no magnet, so position sensing requires external limits or a different configuration.
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 SAIJ125X175-30 FAQ
It features a rear adjusting screw that acts as a mechanical stopper, allowing you to shorten the effective stroke by up to 30 mm. This creates a usable travel window of 145-175 mm, enabling fine-tuning of the end position during setup without replacing the cylinder.
Operating at 0.5 MPa, the SAIJ125X175-30 provides a push force of 6136 N and a pull force of 5734 N. At the maximum operating pressure of 1.0 MPa, it can deliver up to 1251 kgf.
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