Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-75S 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 SAIJ125X1000-75S
The AirTAC SAIJ125X1000-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 1000 mm nominal stroke that can be fine-tuned backward by up to 75 mm, creating a precise 925-1000 mm usable travel window. Delivering 6136 N of push force at 0.5 MPa, it handles heavy-duty positioning with ease.
This variant includes a magnet for CMSE reed and DMSE electronic sensors, fitting neatly into the standard extruded aluminum barrel sensor grooves. It uses a PT tapered port thread and a robust 32 mm carbon steel rod. Because the adjuster acts purely as a mechanical stop, it cannot hold the load without live air; for true locking, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-75S |
|---|---|
| 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 SAIJ125X1000-75S
| 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 SAIJ125X1000-75S Is Used
Variable End Stops
Dial in the exact 925 to 1000 mm end position during machine commissioning to accommodate different material lengths without external stopper blocks.
Product Changeover
Quickly adjust the retract distance on packaging lines when switching between product sizes, saving downtime on the 1000 mm stroke assembly.
Heavy Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy jigs into place, relying on the 32 mm carbon steel rod for structural integrity.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X1000-75S the Right Cylinder?
Choose this 125 mm bore when a smaller 100 mm cylinder lacks thrust, as the 100 mm bore provides 3927 N at 0.5 MPa compared to the 6136 N offered here. The adjustable stroke is ideal for product changeovers, allowing you to dial in the 925-1000 mm end position without swapping cylinders or adding external stops. To match this ISO 15552 replacement exactly, specify the 125 mm bore, 1000 mm stroke, 75 mm adjustment, PT port, and the -S magnet.
With a 1000 mm stroke, the 32 mm rod and M27x2 thread provide rigidity, but the extended length means an external guide is required to prevent excessive side-loading. The mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options. The rear screw sets the travel end and works with the air cushion for deceleration, but neither functions as a brake.
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 SAIJ125X1000-75S FAQ
At 0.5 MPa operating pressure, 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 screw allows you to shorten the 1000 mm nominal stroke by up to 75 mm, providing a usable travel window of 925 to 1000 mm. The screw acts as a mechanical stop and does not lock the load without live air pressure.
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