Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-50
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-50 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 SAIJ100BX55-50
The AirTAC SAIJ100X55-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to dial back the nominal 55 mm travel by up to 50 mm. This creates a highly versatile 5 to 55 mm usable window, letting you fine-tune the retract end-position during commissioning without swapping hardware. It delivers substantial thrust, pushing 3927 N at 0.5 MPa and pulling 3681 N.
Equipped with a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread, this 100 mm bore unit operates at speeds of 30-800 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to add CMSE reed or DMSE electronic switches if position detection is needed later. The rear adjuster functions strictly as a travel stop to set deceleration, not as a lock to hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-50 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-50 |
|---|---|
| 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 SAIJ100BX55-50
| 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 SAIJ100BX55-50 Is Used
End-Stop Calibration
Dial in the exact retract position within the 5-55 mm window during machine setup, using the rear stopper to perfect end-of-stroke positioning without external shims.
Product Changeover
Quickly adjust the cylinder travel to accommodate different product sizes on a packaging line, reducing downtime between production runs.
Heavy Forming Press
Leverage the 3927 N push force at 0.5 MPa for pressing or holding operations where the exact end-position needs on-site fine-tuning.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-50 the Right Cylinder?
Choose this 100 mm bore when an application requires heavy force, as it provides 3927 N of push thrust at 0.5 MPa. If you need slightly less power, stepping down to an 80 mm bore yields 2513 N of push force, whereas moving up to a 125 mm bore offers 6136 N. The adjustable 5-55 mm travel window is ideal for machines requiring variable end-stops or frequent product-size changeovers, eliminating the need to maintain an inventory of multiple fixed-stroke SAI cylinders.
Because the stroke is short, side-load stress is minimal, but always ensure the load is guided externally. Remember that the rear adjuster only sets the travel end; it cannot hold a load safely without continuous air pressure. For true pneumatic locking without live air, consider the SAIL or BSAI series. This SAIJ model is dimensionally interchangeable per ISO 15552 and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ100BX55-50 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 0.7 MPa, the push force increases to 5497 N.
The rear adjuster acts as a mechanical stop that can trim the nominal 55 mm stroke back by up to 50 mm, giving a usable travel window of 5 to 55 mm. It sets the end position and deceleration, but does not lock the load without live air.
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