Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 170mm 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
- Stroke170 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-40S
The AirTAC SAIJ125X170-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force at 0.5MPa and features a 170mm nominal stroke that can be dialed back by up to 40mm, yielding a precise 130-170mm usable travel window for exact end-position tuning. The PT tapered port threads and carbon steel rod come standard on this bore size.
Because it includes a magnet (-S), this model directly supports AirTAC CMSE reed and DMSE solid-state sensors via the dual-side barrel grooves. The rear adjuster acts purely as a mechanical stop to set the retract end position, meaning it will not hold a load without live air pressure. For load-holding requirements, consider an external pilot-operated check valve or the SAIL lock series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 170 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 SAIJ125X170-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×170 | 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 SAIJ125X170-40S Is Used
Product Changeover
Dial in the 130-170mm travel window during line format changes to accommodate different carton or part sizes without replacing the actuator.
Machine Setup
Fine-tune the retract end-position at commissioning to dial out mechanical tolerance and achieve precise pressing or holding alignment.
Heavy Forming
Leverage the 6136N push force at 0.5MPa for robust pressing or bending tasks where the exact end-stop needs on-site adjustment.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X170-40S the Right Cylinder?
Select this 125mm bore when you need heavy thrust—stepping down to a 100mm bore drops the 0.5MPa push force to 3927N, while stepping up to 160mm increases it to 10053N. Choose this adjustable-stroke SAIJ variant over a fixed SAI cylinder when your machine setup requires variable end-stops or product-size changeovers without physically swapping the actuator. The 32mm rod diameter and M27x2 rod thread provide high rigidity, but because the stroke is 170mm, you should ensure proper external guidance to prevent side-load wear. To match this ISO 15552 dimensionally interchangeable cylinder, specify: 125mm bore, 170mm stroke, 40mm adjustment, PT port, and a -S magnet.
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 SAIJ125X170-40S FAQ
At 0.5MPa it provides 6136N of push force and 5734N of pull force. At 0.7MPa the push force increases to 8590N.
The rear adjuster acts as a mechanical stop that lets you trim the 170mm nominal stroke back by up to 40mm, creating a 130-170mm usable travel window. It only sets the end position and does not lock or hold the load without live air pressure.
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