Airtac SAIJ100 Adjustable Cylinder SAIJ100BX325-75
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX325-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 325mm 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.
- BoreØ100 mm
- Stroke325 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX325-75
The AirTAC SAIJ100X325-75 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 325 mm travel by up to 75 mm. This creates a usable 250-325 mm end-position window, allowing precise tuning at commissioning without swapping out the physical cylinder. It delivers a robust 3927 N push force at 0.5 MPa, stepping up to 7068 N at 0.9 MPa.
This configuration features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads with a G1/2 connection. The extruded aluminum barrel includes sensor grooves on both sides. Note that the rear adjuster acts purely as a mechanical stop to set deceleration, not as a lock, so live air is required to hold a load.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX325-75 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX325-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 325 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| 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 – 800 mm/s |
| Cushion | Adjustable, 36 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100BX325-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×325 | 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 SAIJ100 Adjustable Cylinder SAIJ100BX325-75 Is Used
Variable Product Changeover
Dial in the 250-325 mm travel window during format size changes on a packaging line, using the rear screw to set new end positions rapidly without changing hardware.
Machine Setup Calibration
Fine-tune the retract end-stop during initial commissioning to achieve exact positioning, absorbing mechanical tolerances without installing external stopper blocks.
Heavy-Duty Forming Press
Leverage the 7068 N push force at 0.9 MPa for high-load forming operations, utilizing the standard air cushions at both ends to decelerate the tooling smoothly.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX325-75 the Right Cylinder?
Choose this 100 mm bore when a 80 mm cylinder lacks thrust, as the 80 mm yields 2513 N at 0.5 MPa compared to the 3927 N provided here. An adjustable stroke is ideal for production lines running varying product sizes, letting operators fine-tune the retract end-stop on the fly instead of adding external stops or buying a fixed-stroke SAI cylinder. Because the nominal stroke is 325 mm, an external guide is recommended to prevent excessive side-loading on the rod.
For a direct ISO 15552 replacement match, verify the 100 mm bore, 325 mm stroke, 75 mm adjustment, PT port thread, and your required mounting style. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. If your application requires holding position without continuous air pressure, use a SAIL lock or BSAI clamp-lock cylinder instead.
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 SAIJ100 Adjustable Cylinder SAIJ100BX325-75 FAQ
At 0.5 MPa, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At 0.9 MPa, the push force increases to 7068 N.
The rear adjuster screw allows you to mechanically shorten the 325 mm nominal stroke by up to 75 mm, creating a usable travel window of 250 to 325 mm. The adjuster acts as a stop to set the end position and does not lock the load without live air pressure.
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