Airtac SAIJ125 Adjustable Cylinder SAIJ125X20-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X20-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 20mm 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
- Stroke20 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X20-10
The AirTAC SAIJ125X20-10 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. With a nominal 20 mm stroke and a 10 mm adjustment code, it provides a usable travel window of 10 to 20 mm. This bore delivers 6136 N of thrust at 0.5 MPa, making it well-suited for high-force positioning tasks.
The rear screw stopper allows you to fine-tune the end position at commissioning without swapping the cylinder or adding external stops. It uses a PT tapered port thread and a carbon steel rod. The adjuster acts purely as a travel stop and does not hold the load without live air pressure; for load-holding requirements, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X20-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X20-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 20 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 SAIJ125X20-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×20 | 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 SAIJ125X20-10 Is Used
Short-Stroke Pressing
Applies 6136 N of force at 0.5 MPa for high-pressure pressing or clamping operations within a tight 10 to 20 mm travel window.
Commissioning Fine-Tune
The rear adjuster allows operators to dial in the exact end-stop position during machine setup without installing external physical stops.
Product Changeover
Quickly accommodates varying product sizes on a production line by adjusting the retract stroke distance on the fly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X20-10 the Right Cylinder?
Choose this 125 mm bore when you need substantial clamping or pressing force—delivering 6136 N at just 0.5 MPa—and require precise end-position tuning within a short 10 to 20 mm travel window. If your application requires less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa, whereas moving up to a 160 mm bore provides 10053 N.
An adjustable stroke is ideal for machine setups that require variable end stops or product-size changeovers, unlike a fixed-stroke SAI cylinder. To match this ISO 15552 interchangeable profile, verify the 125 mm bore, 20 mm stroke, 10 mm adjustment, PT port, and mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ125X20-10 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. It can deliver up to 1251 kgf at its maximum 1.0 MPa pressure rating.
The nominal 20 mm stroke can be mechanically shortened by up to 10 mm via a rear adjusting screw, creating a 10 to 20 mm usable travel window. This stopper only sets the travel end and does not lock the load without continuous air pressure.
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