Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-50 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 SAIJ125AX175-50
The AirTAC SAIJ125X175-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that lets you trim the retract travel. With a 175mm nominal stroke and a 50mm adjustment range, you get a usable travel window of 125 to 175mm for precise end-position tuning. It delivers 8590N of push force at 0.7MPa, making it ideal for heavy-duty positioning.
This model uses a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides, though this SKU is built without a magnet. The rear screw acts as a travel stop to decelerate the load, not a lock, so live air is required to hold position.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-50 |
|---|---|
| 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 SAIJ125AX175-50
| 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 SAIJ125AX175-50 Is Used
Machine Changeover
Dial in the exact retract end-position from 125 to 175mm during product size transitions without swapping cylinders.
Variable End Stops
Fine-tune the rear travel stop during commissioning to dial out mechanical tolerance and achieve precise heavy-duty positioning.
Heavy Assembly Lines
Leverage the 8590N push force at 0.7MPa to move substantial masses while retaining the flexibility to trim the stroke by up to 50mm.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX175-50 the Right Cylinder?
Choose this 125mm bore when your application requires 8590N push force at 0.7MPa. If you need less force, a 100mm bore provides 5497N push at 0.7MPa, while a 160mm bore offers 14074N for heavier loads. The 50mm adjustment window is perfect for machine setups requiring variable end-stops during product changeovers, replacing the need to swap fixed-stroke SAI cylinders or bolt on external stops.
For ISO 15552 replacement matching, specify: 125mm bore, 175mm stroke, 50mm adjustment, PT tapered port threads, SUS420J2 rod, no magnet, and mounting from the SAIJ set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the nominal stroke is 175mm, side-load is moderate, but always guide the load externally if it is unsupported.
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 SAIJ125AX175-50 FAQ
At 0.7MPa operating pressure, this 125mm bore cylinder provides 8590N of push force and 5734N of pull force. At 0.5MPa, the push force is 6136N.
The rear adjuster screw lets you shorten the effective retract stroke from the 175mm nominal down to 125mm, giving a 125-175mm travel window. The adjuster acts as a travel stop and does not hold the load without live air pressure.
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