Airtac SAIJ125 Adjustable Cylinder SAIJ125X30-30S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X30-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 30mm 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
- Stroke30 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X30-30S
The AirTAC SAIJ125X30-30-S is a double-acting ISO 15552 profile cylinder featuring a rear mechanical adjuster. It provides a 30 mm nominal stroke that can be dialed back by up to 30 mm, creating a 0 to 30 mm usable travel window for exact end-position tuning. Delivering 6136 N of push force at 0.5 MPa, it is built to handle heavy loads in compact spaces.
This -S variant includes a magnet for position sensing with AirTAC CMSE reed or DMSE solid-state switches. The extruded aluminum barrel includes sensor grooves on both sides, and the carbon steel rod uses an M27x2 thread. The rear stopper sets the travel end but does not lock the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X30-30S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X30-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 30 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 SAIJ125X30-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×30 | 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 SAIJ125X30-30S Is Used
Press Fit Tuning
Fine-tune the 0-30 mm stroke during setup to achieve precise insertion depths for bearings without swapping cylinders.
Changeover Stops
Adjust the rear stopper quickly when switching between product variants on an automated line.
Heavy Clamping
Leverage the 6136 N push force to secure heavy workpieces while dialing the exact clamping position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X30-30S the Right Cylinder?
Choose this adjustable model when you need precise end-stop tuning at commissioning without adding external stops. For lighter duties, a 100 mm bore provides 3927 N at 0.5 MPa; for heavier loads, a 160 mm bore yields 10053 N. Since this is a 30 mm stroke, side-load risks are minimal, but always guide the load for longer travels.
The rear adjuster acts purely as a travel stop, not a brake. If your application requires true load-holding without continuous air pressure, consider the SAIL or BSAI series instead. For direct ISO 15552 replacement, match the 125 mm bore, 30 mm stroke, PT tapered port threads, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set.
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 SAIJ125X30-30S FAQ
At 0.5 MPa it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa the push force increases to 8590 N.
The rear adjuster allows you to shorten the 30 mm nominal stroke by up to 30 mm, providing a 0 to 30 mm travel window. It acts as a mechanical stop and does not hold the load without air pressure.
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