Airtac SAIJ125 Adjustable Cylinder SAIJ125AX120-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX120-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 120mm 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
- Stroke120 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX120-30S
The AirTAC SAIJ125X120-30-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window between 90 and 120 mm without swapping out the unit. Delivering 6136 N of push force at 0.5 MPa, it is built with a SUS420J2 stainless steel rod (option A) for superior corrosion resistance and includes a magnet for position sensing. The extruded aluminum barrel design integrates sensor grooves on both sides, accepting CMSE reed and DMSE electronic switches to streamline automation feedback.
This model uses a PT tapered port thread (G1/2) and achieves a maximum speed of 500 mm/s. The rear adjustment mechanism acts purely as a mechanical stop to dial in end positions during machine setup, meaning it will not hold a load dynamically without live air pressure. For applications requiring true load-holding, consider pairing this cylinder with an external pilot-operated check valve or exploring AirTAC SAIL or BSAI series lock cylinders.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX120-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX120-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 120 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 SAIJ125AX120-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×120 | 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 SAIJ125AX120-30S Is Used
Machine Setup & Changeover
Dial in the exact retract position within the 90-120 mm window during product size transitions without physically replacing the cylinder or adding external stopper blocks.
Variable End-Stop Tuning
Perfect for automated lines where the final end-of-stroke position needs slight mechanical tweaking at commissioning to synchronize with downstream pick-and-place operations.
High-Force Positioning
Leverage the 6136 N push force to move heavy pallets or fixtures while relying on the rear adjuster to safely set the precise retraction limit.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX120-30S the Right Cylinder?
Selecting this 125 mm bore adjustable-stroke cylinder makes sense when your application demands high thrust (6136 N push at 0.5 MPa) alongside variable end-stops for product changeovers. If your force requirements are lower, stepping down to an 80 mm bore yields 2513 N of push force, saving space and air consumption. Conversely, if you need heavier forces up to 10053 N, the 160 mm bore is the next step up. The adjustable 90-120 mm travel window is ideal for tuning retract positions on the fly, whereas a fixed-stroke SAI cylinder locks you into a single 120 mm dimension.
When replacing an ISO 15552 cylinder, ensure you match the 125 mm bore, 120 mm stroke, 30 mm adjustment range, PT port, and the -S magnet. This SAIJ model supports a mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets. Although the 120 mm stroke is relatively short, the 32 mm rod diameter provides excellent rigidity, though any long unsupported loads should still be guided externally to prevent side-loading damage.
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 SAIJ125AX120-30S FAQ
At a 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.9 MPa, the push force increases to 11045 N.
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective travel from the nominal 120 mm down to 90 mm. It only sets the end position and decelerates the stroke; it does not lock or hold the load without continuous air pressure.
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 SAIJ125AX120-30S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.