Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 150mm 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
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-30S
The AirTAC SAIJ125X150-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 120-150 mm usable travel window. Delivering 6136 N of push force at 0.5 MPa, it is built with a SUS420J2 stainless steel rod and a PT tapered port. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
Equipped with a -S magnet, this unit supports AirTAC CMSE reed and DMSE electronic sensors. The rear stopper mechanism allows you to fine-tune the end position during commissioning without adding external stops. It uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and relies on variable air cushions at both ends to decelerate the load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAIJ125AX150-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SAIJ125AX150-30S Is Used
Machine Setup Tuning
Dial in the exact retract position during initial commissioning without machining custom spacers.
Product Changeover
Adjust the travel window by up to 30 mm to accommodate different package sizes on a packaging line.
Variable End Stops
Set precise end-of-stroke limits for heavy material handling tasks requiring 6136 N of force.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-30S the Right Cylinder?
Choose this 125 mm bore if your application requires substantial thrust, stepping up from a 100 mm bore that provides 3927 N at 0.5 MPa. The adjustable stroke is ideal for product changeovers where the exact end position varies by up to 30 mm, saving you from swapping out a fixed-stroke SAI cylinder. Remember that the rear adjuster and air cushions only decelerate the load; they do not hold position without live air. For secure load-holding, consider an external pilot-operated check valve or a BSAI clamp-lock cylinder.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 150 mm stroke, PT port, and -S magnet. The 30 mm adjustment code is critical for dialing in the exact retract distance. Since the stroke is 150 mm, side-loading is less severe than on longer strokes, but you should still ensure the M27x2 rod thread is properly aligned with your load to prevent premature seal wear.
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 SAIJ125AX150-30S 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 pressure of 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw allows you to shorten the effective travel from the nominal 150 mm down to 120 mm, creating a 120-150 mm usable window. This stopper only sets the end position and does not lock the load without continuous air pressure.
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