Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 1000mm 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
- Stroke1000 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-100S
The AirTAC SAIJ125X1000-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 900 to 1000 mm. Delivering 6136 N of push force at 0.5 MPa, this 125 mm bore actuator handles heavy-duty positioning. The integrated -S magnet enables position detection with AirTAC CMSE reed or DMSE electronic sensors along the dual-side extruded barrel grooves.
Instead of relying on fixed stops, the rear screw mechanism allows precise end-position tuning during commissioning without swapping the cylinder. The carbon steel rod features an M27x2 thread, and the pneumatic porting uses a PT tapered G1/2 thread. This adjustable-stroke design is ideal for product changeovers on large machinery, offering variable end-stop positioning while maintaining the standard ISO 15552 mounting interface.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 1000 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 SAIJ125X1000-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×1000 | 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 SAIJ125X1000-100S Is Used
Heavy Machinery Changeover
Dial in the 900-1000 mm stroke during product size transitions on large fabrication lines without physically replacing the actuator.
Precision End-Stop Tuning
Fine-tune the retract position at commissioning using the rear adjuster to perfect heavy-load seating without adding external mechanical stops.
Large Material Handling
Drive heavy pallets or assemblies with 6136 N of thrust, using the adjustable window to synchronize end positions across multiple stations.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-100S the Right Cylinder?
Select this 125 mm bore actuator when an application demands high thrust (6136 N at 0.5 MPa) alongside a variable travel window of 900-1000 mm. If your setup requires less force, stepping down to a 100 mm bore yields 3927 N, whereas moving up to a 160 mm bore provides 10053 N. The adjustable rear stopper is a mechanical travel limit, not a locking device; it cannot hold a load without live air pressure. For fail-safe load holding, consider an AirTAC SAIL pneumatic lock or an external rod lock.
To replace an ISO 15552 cylinder, match the 125 mm bore, 1000 mm stroke, 100 mm adjustment range, PT G1/2 port, and -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets. Because the stroke is 1000 mm, the M27x2 carbon steel rod is highly susceptible to side-loading; an external guide rail must support the load to prevent binding and 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 SAIJ125X1000-100S FAQ
At 0.5 MPa, this 125 mm bore cylinder 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 1000 mm nominal stroke by up to 100 mm, creating a 900-1000 mm travel window. It acts as a mechanical stop and does not lock the load without continuous air pressure.
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