Airtac SAIJ100 Adjustable Cylinder SAIJ100BX45-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX45-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 45mm 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
- Stroke45 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX45-20S
The AirTAC SAIJ100X45-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 3927N of push force at 0.5 MPa and features a 25mm rod with an M20x1.5 thread. The built-in adjuster allows you to trim the 45mm nominal stroke back by up to 20mm, creating a precise 25-45mm usable travel window for fine-tuning end positions at commissioning.
This specific SKU is configured with a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for position sensing. It supports AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX45-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX45-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 45 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 SAIJ100BX45-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×45 | 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 SAIJ100BX45-20S Is Used
Machine Changeover
Dial in the exact 25-45mm end position during product size changes without swapping cylinders or adding external mechanical stops.
Clamping Force Setup
Fine-tune the clamping travel on a machining fixture, using the 3927N thrust at 0.5 MPa to securely hold varying part profiles.
Sensor Positioning
Leverage the -S magnet and dual sensor grooves to mount CMSE or DMSE switches exactly where the adjusted stroke terminates.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX45-20S the Right Cylinder?
Choose this 100mm bore when an application requires substantial thrust—stepping up from a 63mm bore yields 1559N at 0.5 MPa, while dropping to a 125mm bore provides 6136N. The adjustable stroke is ideal for machine changeovers where the exact end-of-stroke position varies slightly, eliminating the need to swap out a fixed-stroke SAI cylinder or add external stops. Note that the rear adjuster acts only as a travel stop; it does not hold the load without live air pressure. For fail-safe load holding, consider an external rod lock or pilot-operated check valve.
When specifying this ISO 15552 interchangeable cylinder, confirm the 45mm stroke, 20mm adjustment range, PT tapered port threads, and the -S magnet option. The 25mm rod and M20x1.5 thread provide robust resistance to side loading, though any externally guided load should be supported independently to prevent rod binding.
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 SAIJ100BX45-20S FAQ
At 0.5 MPa operating pressure, this 100mm bore cylinder generates 3927N of push force and 3681N of pull force. At the maximum 1.0 MPa pressure, it can output up to 801kgf.
The rear adjusting screw acts as a mechanical stopper that lets you shorten the 45mm nominal stroke by up to 20mm, providing a usable travel window of 25-45mm. This allows precise end-position tuning during commissioning without replacing the cylinder.
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