Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-20 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 SAIJ100BX550-20
The AirTAC SAIJ100X550-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 530 to 550 mm, allowing you to dial back the nominal 550 mm stroke by up to 20 mm during commissioning. Built with a SUS304 stainless steel rod, it handles aggressive environments while delivering 7068 N of push force at 0.9 MPa.
This model uses a PT G1/2 port and omits the FB, CA, CB, and CR mounting variants found on some standard cylinders, retaining the Basic, FA, LB, TC, FTC, TCM1, and TCM2 interface set. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed and DMSE electronic switches, though this specific SKU ships without a magnet.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-20 |
|---|---|
| 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 SAIJ100BX550-20
| 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 SAIJ100BX550-20 Is Used
Precision End-Stop Tuning
Fine-tune the retraction point within the 530-550 mm window during machine commissioning to achieve exact positioning without external stopper blocks.
Product Size Changeover
Quickly adjust the travel end-position on packaging lines when switching to different product sizes, using the rear screw to trim up to 20 mm of stroke.
Heavy-Duty Automation
Leverage the 7068 N push force at 0.9 MPa for heavy workpiece handling, using the SUS304 rod for corrosion resistance in washdown or humid factory areas.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX550-20 the Right Cylinder?
Choose this 100 mm bore cylinder when a 50 mm bore falls short on thrust, as the 50 mm variant only offers 1767 N push at 0.9 MPa. The SAIJ100X550-20 is selected over a fixed SAI cylinder when a machine requires variable end-stops to accommodate product changeovers without physically swapping the cylinder or adding external stops. Because the 550 mm stroke is substantial, an external guide rail is recommended to prevent excessive side-loading on the M20x1.5 rod thread.
Remember that the rear adjuster functions strictly as a travel stop, not a lock. The SAIJ100X550-20 will not hold a load without live air pressure; for true pneumatic locking, use an AirTAC SAIL or BSAI cylinder. To match this ISO 15552 replacement exactly, specify the 100 mm bore, 550 mm stroke, 20 mm adjustment, PT G1/2 port, SUS304 (B) rod, and no magnet.
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 SAIJ100BX550-20 FAQ
At 0.9 MPa operating pressure, this 100 mm bore cylinder provides a push force of 7068 N and a pull force of 3681 N. It can deliver a maximum push of 801 kgf at 1.0 MPa.
The external rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the 550 mm nominal stroke down to 530 mm. It fine-tunes the retract end-position but does not lock the load without continuous air pressure.
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