Airtac SAIJ100 Adjustable Cylinder SAIJ100X550-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X550-40S 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 SAIJ100X550-40S
The AirTAC SAIJ100X550-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 3927N of push force at 0.5MPa and features a 510-550mm usable travel window, allowing you to dial back the nominal 550mm stroke by up to 40mm during commissioning. This built-in adjustability eliminates the need to swap cylinders or add external stops when fine-tuning end positions.
This variant includes a magnet for position sensing and uses a carbon steel rod with an M20x1.5 thread. Because the 550mm stroke is relatively long, the 25mm rod diameter provides robust support, though an external guide is still recommended for heavy side loads. The extruded aluminum barrel incorporates sensor grooves on both sides, compatible with AirTAC CMSE reed and DMSE electronic solid-state switches.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X550-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X550-40S |
|---|---|
| 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 SAIJ100X550-40S
| 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 SAIJ100X550-40S Is Used
Variable End-Stop Tuning
Fine-tune the 510-550mm stroke window during machine commissioning to achieve precise end-positioning without physically swapping out the entire cylinder.
Product Size Changeovers
Quickly adapt automated lines to different product lengths by dialing in the 40mm adjustment range, bypassing the need to bolt on external mechanical stops.
Heavy-Duty Positioning
Leverage the 3927N push force at 0.5MPa to move substantial loads along a conveyor while maintaining the flexibility to adjust the travel endpoint on the fly.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X550-40S the Right Cylinder?
Choose this 100mm bore when a 63mm cylinder (providing 1559N push at 0.5MPa) lacks the thrust for your application, but a 125mm bore is physically too large. The adjustable 510-550mm travel window is ideal for product-size changeovers on a line, letting you set variable end-stops without machining new hard stops. To match this ISO 15552 cylinder for a replacement, verify the 550mm stroke, 40mm adjustment, PT tapered port threads, and the -S magnet option.
For strokes of 550mm, ensuring adequate external guidance is critical to prevent rod binding under side loads. Remember that the rear adjuster acts only as a travel stop to set deceleration alongside the air cushions; it does not hold the load without live air. For true load-holding without pneumatic pressure, consider an AirTAC SAIL locking cylinder or an external rod lock. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR.
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 SAIJ100X550-40S FAQ
At 0.5MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. At 0.7MPa, the push force increases to 5497N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective travel from the nominal 550mm down to 510mm. It sets the retract end position but does not lock the load without live air pressure.
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