Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-100S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-100S 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 SAIJ100BX550-100S
The AirTAC SAIJ100X550-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the nominal 550 mm travel to a precise usable window of 450 to 550 mm. Delivering a robust 5497 N of push force at 0.7 MPa, this 100 mm bore actuator handles heavy industrial loads with ease. The PT tapered port threads match the standard G1/2 connection, while the integrated -S magnet allows direct mounting of CMSE reed and DMSE electronic sensors along the dual-sided extruded aluminum barrel grooves.
This specific SKU features a SUS304 stainless steel rod (code B) for superior corrosion resistance in harsh environments. The rear adjustment screw functions purely as a mechanical stop to fine-tune the retract end position during commissioning or product changeovers. It is not a locking device, meaning the cylinder cannot hold a load without live air pressure. For applications requiring position holding without continuous pneumatic supply, consider the related SAIL or BSAI clamp-lock series.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-100S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-100S |
|---|---|
| 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 SAIJ100BX550-100S
| 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 SAIJ100BX550-100S Is Used
Variable End-Stop Positioning
Ideal for packaging lines where the retract end-position needs frequent adjustment within a 450 to 550 mm window to accommodate different carton sizes without changing the actuator.
Machine Setup & Commissioning
The rear adjuster screw allows technicians to fine-tune the final retract position during initial machine build or product changeover, eliminating the need for physical spacer shims.
Heavy-Duty Material Handling
With 5497 N of push force at 0.7 MPa, this cylinder pushes heavy pallets or workpieces, while the SUS304 rod withstands washdown environments in food or pharmaceutical facilities.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-100S the Right Cylinder?
Selecting this 100 mm bore actuator makes sense when your application requires substantial thrust, as stepping down to an 80 mm bore drops the 0.5 MPa push force to 2513 N. Conversely, moving up to a 125 mm bore increases the 0.5 MPa push force to 6136 N but requires a larger footprint. The defining advantage of the SAIJ100X550-100-S is its 100 mm adjustment window, which allows you to modify the end-of-stroke position on the fly without swapping the cylinder or adding external stopper blocks. When configuring your ISO 15552 replacement, match the 550 mm stroke, 100 mm bore, PT port threads, and -S magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Because the 550 mm stroke is relatively long, the 25 mm rod diameter should be evaluated for side-load risks. Even with the larger M20x1.5 rod thread providing sturdy attachment points, an unsupported load over this travel distance can cause binding. Always use an external guide rail to support the load and prevent lateral forces from damaging the rod seals. The variable air cushions at both ends, offering 36 mm of cushioning length, will help decelerate the mass, but they do not substitute for a mechanical lock.
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 SAIJ100BX550-100S FAQ
At a 0.5 MPa operating pressure, the push force is 3927 N and the pull force is 3681 N. When operating at 0.7 MPa, the push force increases to 5497 N. The maximum rated force is 801 kgf at 1.0 MPa.
The rear of the cylinder features an external adjusting screw that acts as a mechanical stop. For this SAIJ100X550-100-S model, you can shorten the effective 550 mm stroke by up to 100 mm, providing a usable travel window of 450 to 550 mm. The adjuster only sets the end position and does not lock the load without live air pressure.
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