Airtac SAIJ100 Adjustable Cylinder SAIJ100BX45-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX45-20 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 SAIJ100BX45-20
The AirTAC SAIJ100X45-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 25-45 mm usable travel window from its 45 mm nominal stroke. Delivering 3927 N of push force at 0.5 MPa, it is equipped with a SUS304 stainless steel rod for corrosion resistance and uses a PT tapered G1/2 port.
This adjustable model lets you fine-tune the retract end position at commissioning without adding external stops. It features variable air cushions at both ends to manage kinetic energy, but note that the adjuster acts as a travel stop, not a lock, so it will not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX45-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX45-20 |
|---|---|
| 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 SAIJ100BX45-20
| 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 SAIJ100BX45-20 Is Used
Machine Setup Calibration
Dial in the exact retract position during initial commissioning without swapping out the entire cylinder or adding external mechanical stops.
Product Changeover
Quickly adjust the 25-45 mm travel window on packaging lines to accommodate varying product sizes and formats.
Assembly End-Stops
Fine-tune the end-of-stroke position on assembly lines where minor positional offsets are needed for precise component placement.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX45-20 the Right Cylinder?
Choose this 100 mm bore when an application requires substantial thrust (3927 N at 0.5 MPa) but needs precise end-position tuning within a 25-45 mm window. If your force requirements are lower, stepping down to a 63 mm bore yields 1559 N, whereas moving up to a 125 mm bore provides 6136 N. The adjustable rear screw is ideal for product changeovers where the exact retract distance varies slightly.
To replace an ISO 15552 cylinder, match the 100 mm bore, 45 mm stroke, PT G1/2 port, and the SUS304 (B) rod material. Since this SAIJ omits the FB, CA, CB, and CR mounts, verify your setup uses the available Basic, FA, LB, TC, FTC, TCM1, or TCM2 interfaces. For holding loads without live air, consider an AirTAC SAIL or BSAI 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 SAIJ100BX45-20 FAQ
At 0.5 MPa, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At 0.7 MPa, the push force increases to 5497 N.
The rear adjuster allows you to trim the 45 mm nominal stroke by up to 20 mm, creating a usable travel window of 25-45 mm. The adjuster acts as a mechanical stop to set the end position and is not a lock.
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