Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-40S
The AirTAC SAIJ125X145-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 105 to 145 mm. Delivering 6136 N of push force at 0.5 MPa, it handles heavy actuation tasks with precision. The extruded aluminum barrel features sensor grooves on both sides, and this unit includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic solid-state switches.
This model features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. The rear adjuster acts purely as a mechanical stop to fine-tune the retract position at commissioning without swapping the cylinder. It is not a locking device; for load-holding without live air pressure, consider the SAIL or BSAI series instead.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 145 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 SAIJ125AX145-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×145 | 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 SAIJ125AX145-40S Is Used
Product Changeover
Dial in the 105-145 mm travel window during format size changes on packaging lines without replacing the actuator.
Machine Setup
Fine-tune the retract end-position at commissioning using the rear screw stopper to avoid adding external spacers.
Heavy Forming
Leverage the 6136 N push force at 0.5 MPa for pressing and forming tasks requiring precise end-of-stroke positioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-40S the Right Cylinder?
Select this 125 mm bore cylinder when a 100 mm bore (offering 3927 N at 0.5 MPa) lacks sufficient thrust, but you want to avoid stepping up to a 160 mm body that demands 10053 N. The 40 mm adjustment range is ideal for product changeovers, letting you dial in the exact end-stop mechanically rather than adding external stops or changing a fixed-stroke SAI cylinder. It uses a PT tapered G1/2 port and supports mountings Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since the 145 mm stroke is under 300 mm, side-load concerns are minimal, though the 32 mm rod thread handles typical bending stresses well.
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 SAIJ125AX145-40S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The nominal 145 mm stroke can be mechanically shortened by up to 40 mm via a rear screw stopper, creating a 105 to 145 mm usable travel window. This stopper only sets the end position and does not lock the load without live air pressure.
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Standard models usually ship in 3-4 days.
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