Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-50 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 SAIJ125AX145-50
The AirTAC SAIJ125X145-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 6136N push force at 0.5 MPa, utilizing a 32mm SUS420J2 stainless steel rod (material code A) and a PT G1/2 port. By turning the external stopper screw, you can trim the nominal 145mm travel back by up to 50mm, creating a precise 95-145mm usable window for exact end-position tuning.
This adjustable feature allows you to dial in the retract end-position at commissioning or during a product-size changeover without swapping the entire actuator or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE solid-state switches, though this specific SKU is built without a magnet. Remember that the rear adjuster acts purely as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-50 |
|---|---|
| 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 SAIJ125AX145-50
| 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 SAIJ125AX145-50 Is Used
Format Changeovers
Quickly dial in the 95-145mm stroke window during packaging line size changeovers without disassembling the actuator or adding external shims.
Heavy Pressing
Leverage the 6136N push force at 0.5 MPa for pressing operations, using the rear stopper to fine-tune the exact depth of the retract position.
Machine Setup
Perfect the end-of-travel position during initial machine commissioning, utilizing the 50mm adjustment range to compensate for mechanical tolerances.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-50 the Right Cylinder?
Choose this 125mm bore actuator when your application requires heavy force in the 6136N range at 0.5 MPa, stepping up from a 100mm bore that provides 3927N. The 50mm adjustment window is ideal for machinery that undergoes frequent format changes, allowing you to reposition the retract stop on the fly rather than machining new spacers. For load-holding without continuous air pressure, this cylinder is not suitable; you should instead look at the SAIL (air-released lock) or BSAI (clamp-lock) series.
When replacing an ISO 15552 cylinder, match the 125mm bore, 145mm stroke, 50mm adjustment range, PT G1/2 port, and SUS420J2 rod material. Mounting options for this SAIJ series are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR styles found on some standard actuators. Because the 145mm stroke is relatively short for this large bore, side-load risks are minimal, but an external guide is still recommended for heavy off-center loads.
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 SAIJ125AX145-50 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides a push force of 6136N and a pull force of 5734N. At the maximum 1.0 MPa pressure, it delivers up to 1251 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from the nominal 145mm down to as little as 95mm. This creates a 95-145mm usable window for fine-tuning the end position without swapping the cylinder.
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 SAIJ125AX145-50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.