Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 55mm 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
- Stroke55 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-40S
The AirTAC SAIJ100X55-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 15 to 55 mm, allowing you to dial back the nominal 55 mm stroke by up to 40 mm during commissioning. Delivering 3927 N of push force at 0.5 MPa, it integrates a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread for reliable sealing.
This model includes a magnet for position sensing, operating seamlessly with AirTAC CMSE reed and DMSE electronic switches mounted into the dual-side sensor grooves. The rear adjuster functions strictly as a travel stop to fine-tune deceleration and end positions without external stops, but it does not hold the load without live air pressure. Mounting options include the standard SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 55 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 SAIJ100BX55-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×55 | 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 SAIJ100BX55-40S Is Used
Product Changeover
Quickly dial in the 15-55 mm travel window to accommodate varying package sizes on a packaging line without swapping out the entire actuator.
End-Stop Tuning
Fine-tune the final retract position during machine commissioning to achieve exact pressing or clamping distances without adding external mechanical stops.
High-Force Positioning
Leverage the 3927 N push force at 0.5 MPa to move heavy pallets or fixtures while precisely controlling the stroke end-point.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-40S the Right Cylinder?
Choose this 100 mm bore cylinder when an application demands high thrust (3927 N at 0.5 MPa) combined with variable end-position tuning. If the force is excessive, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa. The adjustable stroke is ideal for machine setups requiring frequent product-size changeovers, whereas a fixed SAI cylinder suits static end-stops. For load-holding without continuous air pressure, select a SAIL or BSAI cylinder instead, as the SAIJ adjuster is not a lock.
When replacing an ISO 15552 cylinder, verify the 100 mm bore, 55 mm nominal stroke, 40 mm adjustment range, G1/2 port, PT thread type, and the required -S magnet. The robust 25 mm rod and M20x1.5 thread handle significant side loads, though external guides are recommended if the stroke approaches or exceeds 300 mm.
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 SAIJ100BX55-40S FAQ
At 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At the maximum operating pressure of 1.0 MPa, it delivers up to 801 kgf.
The rear adjuster acts as a mechanical stop that trims the effective travel. For this 55 mm stroke model, the -40 code means you can shorten the stroke by up to 40 mm, creating a usable travel window of 15 to 55 mm to fine-tune the end position.
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