Airtac SAIJ125 Adjustable Cylinder SAIJ125X270-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X270-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 270mm 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
- Stroke270 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X270-75S
The AirTAC SAIJ125X270-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 8590N push force at 0.7 MPa. It features a carbon steel rod and a PT tapered port thread. By integrating a -S magnet, it directly supports AirTAC CMSE reed and DMSE electronic sensors for precise end-position detection.
This model provides a 195-270mm usable travel window, allowing you to dial back the nominal 270mm stroke by up to 75mm during commissioning. It utilizes a subset of ISO 15552 mounting interfaces, specifically Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X270-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X270-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 270 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 SAIJ125X270-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×270 | 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 SAIJ125X270-75S Is Used
Variable End-Stop Tuning
Dial in the exact retract distance within the 195-270mm window during initial machine commissioning without physically swapping out the actuator.
Product Size Changeover
Quickly adapt conveyor sorting or pressing mechanisms to new product dimensions by adjusting the rear stopper screw on the fly.
Heavy-Duty Positioning
Leverage the 8590N push force to move heavy pallets or fixtures, relying on the 32mm rod to handle high mechanical stress.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X270-75S the Right Cylinder?
Choose this 125mm bore when an 80mm bore (providing 3518N push force at 0.7 MPa) lacks the necessary thrust for heavy loads, or step down if a 100mm bore (5497N push) is sufficient. The 75mm adjustment range is ideal for product changeovers, letting you fine-tune the retract end-position without swapping the cylinder or adding external stops. Because the rear adjuster acts only as a travel stop and the air cushions handle deceleration, neither will hold the load without live air—use SAIL or BSAI cylinders for true pneumatic locking. For stroke lengths of 300mm or more, ensure an external guide is used to support the rod and prevent excessive side-loading.
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 SAIJ125X270-75S FAQ
At an operating pressure of 0.7 MPa, this 125mm bore cylinder provides 8590N of push force and 5734N of pull force. It can reach a maximum thrust of 1251 kgf at 1.0 MPa.
The rear adjuster screw acts as an external stopper that shortens the effective stroke from the nominal 270mm down to as little as 195mm. This allows you to set the exact end-position at commissioning without changing the cylinder itself.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X270-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.