Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 550mm 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
- Stroke550 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-20S
The AirTAC SAIJ100X550-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 5497 N push force at 0.7 MPa, making it suitable for heavy-duty actuation. The built-in adjuster allows you to trim the nominal 550 mm stroke back by up to 20 mm, creating a precise 530-550 mm usable travel window for fine-tuning end positions during commissioning without swapping out the physical cylinder.
This specific configuration features a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for position sensing. It works seamlessly with AirTAC CMSE reed switches and DMSE solid-state electronic sensors fitted into the extruded aluminum barrel's dual sensor grooves. The PT tapered port thread and adjustable end-stop provide setup flexibility while maintaining a true ISO 15552 mounting interface.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 550 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 SAIJ100BX550-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×550 | 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 SAIJ100BX550-20S Is Used
Machine Changeover
Dial in the 530-550 mm travel window during product size transitions to set precise retract positions without replacing hardware.
Variable End Stops
Fine-tune the rear stopper on a heavy conveyor divert arm to accommodate varying package lengths on the fly.
Assembly Station Tuning
Adjust the final end-position of a 5497 N press mechanism during commissioning to achieve perfect part seating.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-20S the Right Cylinder?
Selecting this 100 mm bore model makes sense when your application requires the 5497 N push force at 0.7 MPa and a variable end-stop. If you need less force, stepping down to an 80 mm bore yields 3518 N push at 0.7 MPa; if you require more, the 125 mm bore provides 8590 N. Choose the SAIJ adjustable-stroke variant over a fixed SAI cylinder when you need to dial in a specific retract distance on the fly during product changeovers.
Because the 550 mm stroke is substantial, the 25 mm rod diameter should still be paired with an external guide to prevent excessive side-loading on the seals. Remember that the rear adjuster acts only as a travel stop, not a lock; the cylinder cannot hold a load without live air pressure. For load-holding without continuous air, consider an external rod lock or the AirTAC BSAI clamp-lock series. To match this ISO 15552 replacement exactly, specify bore 100, stroke 550, adjust 20, PT ports, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting, and the -S magnet.
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 SAIJ100BX550-20S FAQ
At an operating pressure of 0.7 MPa, this 100 mm bore cylinder generates 5497 N of push force and 5150 N of pull force. It can reach a maximum of 7068 N push force at 0.9 MPa.
The rear adjuster screw allows you to shorten the 550 mm nominal stroke by up to 20 mm, providing a usable travel window between 530 and 550 mm. This stopper only decelerates or sets the travel end and does not lock the load without live air pressure.
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