Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-40S 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 SAIJ125AX150-40S
The AirTAC SAIJ125X150-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering a robust 6136N pull force at 0.5 MPa. By turning the rear stopper screw, you can fine-tune the effective travel down from the 150 mm nominal stroke, providing a usable adjustment window of 110-150 mm. This built-in adjustability allows operators to dial in exact end positions during commissioning without swapping out the cylinder or adding external stops.
Built with a SUS420J2 stainless steel rod (material code A) and PT tapered ports, this model handles speeds of 30-500 mm/s. The extruded aluminum barrel features sensor grooves on both sides, and because this SKU includes a magnet (-S), it is fully compatible with AirTAC CMSE reed and DMSE solid-state switches. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-40S |
|---|---|
| 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 SAIJ125AX150-40S
| 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 SAIJ125AX150-40S Is Used
Machine Changeover
Rapidly reconfigure the retract end-position within the 110-150 mm window when switching product sizes on a packaging line.
End-Position Tuning
Fine-tune the exact retracted position during commissioning without machining new mountings or adding external stopper blocks.
Assembly Pressing
Leverage the 6136N pull force to secure components while using the rear screw to precisely set the pressing depth limit.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX150-40S the Right Cylinder?
Choose this 125 mm bore when you need more force than the 80 mm class (which yields 2268N pull at 0.5 MPa) but want to avoid the heavier 160 mm frame. The 40 mm adjustment range is ideal for product changeovers on a line, letting you shift the retract end-stop on the fly. Remember that the rear adjuster acts purely as a travel stop and the air cushions only manage deceleration; neither will hold a load without live air pressure. For true position holding, select an SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external rod lock. When replacing an ISO 15552 cylinder, match the 125 mm bore, 150 mm stroke, 40 mm adjustment, PT ports, SUS420J2 rod, and the -S magnet.
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 SAIJ125AX150-40S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136N of pull force and 8590N of push force. It reaches a maximum of 1251 kgf at 1.0 MPa.
The rear stopper screw lets you trim the 150 mm nominal stroke back by up to 40 mm, creating an effective travel window of 110-150 mm. This mechanical stop sets the end position but does not lock the load without continuous air pressure.
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