Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-40S 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 SAIJ100BX550-40S
The AirTAC SAIJ100X550-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster, providing a usable travel window of 510 to 550 mm. It delivers a robust 5497 N of push force at 0.7 MPa, making it well-suited for heavy-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This specific configuration incorporates a SUS304 stainless steel rod for superior corrosion resistance and utilizes a PT tapered port thread. The rear adjuster acts purely as a mechanical stop to fine-tune the end position during commissioning; it does not hold the load without live air pressure. For position-holding requirements, an external pilot-operated check valve or a related SAIL lock cylinder is necessary.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-40S |
|---|---|
| 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 SAIJ100BX550-40S
| 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 SAIJ100BX550-40S Is Used
Machine Changeover
Dial in the exact 510 to 550 mm travel window during product size transitions without physically replacing the cylinder.
Variable End-Stop Tuning
Fine-tune the retract end position during initial commissioning to perfectly align heavy workpieces.
Heavy-Duty Positioning
Leverage the 5497 N push force at 0.7 MPa to move and index substantial loads along an automated line.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-40S the Right Cylinder?
Select this adjustable-stroke model over a fixed SAI when your application requires precise end-position tuning during machine setup or product changeover without swapping cylinders or adding external stopper blocks. The 25 mm rod diameter and M20x1.5 rod thread provide substantial rigidity, but because the stroke is 550 mm, an external guide is strongly recommended to prevent excessive side-loading on the barrel.
When specifying a replacement, ensure you match the 100 mm bore, 550 mm nominal stroke, 40 mm adjustment range, PT G1/2 port, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR variants. If your force requirements are lower, stepping down to an 80 mm bore yields 3518 N of push force at 0.7 MPa.
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 SAIJ100BX550-40S FAQ
At an operating pressure of 0.7 MPa, this 100 mm bore cylinder generates 5497 N of push force and 3681 N of pull force.
The rear adjuster acts as a mechanical stop that allows you to shorten the effective stroke by up to 40 mm, creating a usable travel window of 510 to 550 mm. It does not lock the load without continuous air pressure.
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