Airtac SAIJ125 Adjustable Cylinder SAIJ125X155-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X155-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 155mm 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
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X155-10S
The AirTAC SAIJ125X155-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the travel by up to 10 mm. This yields a usable stroke window of 145 to 155 mm, perfect for fine-tuning end positions during commissioning without adding external stops. It delivers robust thrust, providing 6136 N of push force and 5734 N of pull force at 0.5 MPa.
Fitted with a carbon steel piston rod and tapered PT G1/2 ports, this unit includes a magnet for position sensing. You can pair it with AirTAC CMSE reed switches or DMSE solid-state sensors. The mounting interface covers Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB and CA styles.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X155-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X155-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 155 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 SAIJ125X155-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×155 | 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 SAIJ125X155-10S Is Used
Machine Changeover
Quickly fine-tune the 145-155 mm travel window during product size changes on a packaging line without replacing the cylinder.
Press Fit Tuning
Dial in the exact end-position for a heavy-duty press operation, using the rear stopper to compensate for tooling wear.
Heavy Material Handling
Leverage the 6136 N push force at 0.5 MPa to move substantial pallets or components, adjusting the stroke to avoid hard crashes.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X155-10S the Right Cylinder?
Choose this 125 mm bore when your application requires over 6000 N of thrust at 0.5 MPa but does not need the 10053 N output of the larger 160 mm variant. The adjustable stroke is ideal for product changeovers where a 10 mm end-position tweak is necessary, saving you from swapping out a fixed-stroke SAI cylinder.
Remember that the rear adjuster acts only as a travel stop, not a brake; it cannot hold a load without live air pressure. For dead-end load holding, consider an external pilot-operated check valve or the SAIL locking cylinder. This SAIJ125X155-10-S is dimensionally interchangeable per ISO 15552, featuring a magnet (-S), PT ports, and a 30-500 mm/s speed range.
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 SAIJ125X155-10S FAQ
The rear adjuster screw lets you shorten the nominal 155 mm stroke by up to 10 mm, creating a 145-155 mm travel window. It functions as a mechanical stop to set the end position and does not lock the load without live air pressure.
At 0.5 MPa, it provides 6136 N push and 5734 N pull force. The included magnet works with AirTAC CMSE reed switches and DMSE electronic sensors for precise position feedback.
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Standard models usually ship in 3-4 days.
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