Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 135mm 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
- Stroke135 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-10S
The AirTAC SAIJ125X135-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 6136N push force at 0.5 MPa, utilizing a 32mm carbon steel rod with an M27x2 thread. The built-in rear stopper allows you to fine-tune the retract end-position, creating a usable travel window of 125 to 135mm without adding external stops.
This unit includes a piston magnet for CMSE reed and DMSE electronic sensors, fitting cleanly into the standard extruded aluminum barrel sensor grooves. It features a PT tapered port and reaches speeds of 30-500 mm/s. The adjuster acts strictly as a travel stop for deceleration, so you will need live air or a SAIL lock variant to hold a load in place.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 135 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 SAIJ125X135-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×135 | 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 SAIJ125X135-10S Is Used
Product Changeover
Dial in the 125-135mm travel window during line changeovers to accommodate slightly different package sizes without swapping hardware.
End-Stop Tuning
Fine-tune the retract position during machine commissioning to perfect a pressing operation, avoiding the need for external mechanical spacers.
Assembly Station Setup
Use the 6136N thrust to drive a forming tool while relying on the rear screw to precisely set the penetration depth for delicate parts.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X135-10S the Right Cylinder?
Choose this 125mm bore when an 80mm bore falls short of the required force, delivering 2513N at 0.5 MPa compared to this model's 6136N. The 10mm adjustable window is ideal for product changeovers, letting you dial in the exact end-stop at commissioning rather than machining custom spacers. For an exact ISO 15552 replacement, match the 125mm bore, 135mm stroke, 10mm adjustment, PT port, and -S magnet.
With a 135mm stroke, side-loading is less of a concern, but the heavy 32mm rod still requires linear guidance for optimal seal life. SAIJ supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts, deliberately omitting FB and CA styles.
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 SAIJ125X135-10S FAQ
At 0.5 MPa operating pressure, it provides 6136N of push force and 5734N of pull force. At 0.7 MPa, the push force increases to 8590N.
The rear adjuster screw lets you trim the effective travel back by up to 10mm, creating a 125-135mm usable window. It functions as a stop to set the end position, not a lock to hold the load without air pressure.
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