Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-50S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-50S 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 SAIJ100BX550-50S
The AirTAC SAIJ100X550-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 550 mm stroke that can be fine-tuned backward by up to 50 mm, creating a precise 500-550 mm usable travel window. Delivering 5497 N of push force at 0.7 MPa, it handles heavy-duty positioning with ease. The integrated -S magnet enables position sensing with AirTAC CMSE reed and DMSE electronic switches.
This model features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads mated to a G1/2 port. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. The rear adjuster acts purely as a mechanical stop to set the end position and does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-50S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-50S |
|---|---|
| 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 SAIJ100BX550-50S
| 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 SAIJ100BX550-50S Is Used
Product Size Changeover
Dial in the 500-550 mm travel window during format changes on packaging lines, using the rear screw to set new end positions without adding external stops.
Heavy-Duty Positioning
Leverage the 5497 N push force at 0.7 MPa to move heavy pallets or fixtures, relying on the SUS304 rod for durability in demanding industrial environments.
Commissioning Fine-Tuning
Trim the effective stroke by up to 50 mm during initial machine setup to perfectly sync end-of-stroke positions with adjacent equipment.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-50S the Right Cylinder?
Choose this 100 mm bore when you need substantial thrust, such as the 5497 N push force at 0.7 MPa, but want to avoid stepping up to the 125 mm bore which yields 8590 N. The 50 mm adjustment range is ideal for machine setups requiring variable end-stops or product-size changeovers without swapping the cylinder. For load-holding without continuous air pressure, you must add an external rod lock or look to the SAIL or BSAI series, as the SAIJ adjuster is not a brake.
When replacing an ISO 15552 cylinder, match the 100 mm bore, 550 mm stroke, 50 mm adjustment, PT port threads, and the -S magnet requirement. Because the 550 mm stroke is relatively long, the 25 mm rod diameter should still be paired with an external guide to prevent excessive side-loading on the piston. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ100BX550-50S FAQ
At 0.7 MPa operating pressure, this 100 mm bore cylinder provides 5497 N of push force and 3681 N of pull force. At a maximum 1.0 MPa pressure, the push force reaches 7068 N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 550 mm nominal stroke by up to 50 mm, resulting in a 500-550 mm usable travel window. It only sets the end position and does not lock or hold the load without live air pressure.
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