Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-20
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-20 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 SAIJ100BX55-20
The AirTAC SAIJ100X55-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 3927N of push force at 0.5 MPa. It features a SUS304 stainless steel rod and PT tapered ports. By turning the rear screw, you can trim the effective travel, creating a precise 35-55mm usable window for your application without needing external stops.
This adjustable-stroke design is invaluable during commissioning or product changeovers, allowing you to dial in the exact end position on the fly. The rear adjuster functions strictly as a travel stop to set the deceleration point alongside the standard air cushions, not as a locking mechanism. For load-holding without live air pressure, you would need to integrate a SAIL or BSAI variant instead.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-20 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-20 |
|---|---|
| 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 SAIJ100BX55-20
| 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 SAIJ100BX55-20 Is Used
End-Position Tuning
Dial in the exact 35 to 55mm travel distance during machine setup to perfect the pressing or clamping depth without swapping hardware.
Product Changeover
Quickly adjust the rear stopper to accommodate slightly different product sizes on the same line, minimizing downtime between runs.
Short-Stroke Pressing
Leverage the 3927N push force for heavy-duty forming or pressing tasks where precise, adjustable end-of-stroke positioning is critical.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX55-20 the Right Cylinder?
Choose this 100mm bore when you need substantial thrust, such as the 3927N push force at 0.5 MPa, but require the flexibility to fine-tune a short 35-55mm travel window. If your application demands less force, stepping down to an 80mm bore yields 2513N push force, whereas a 125mm bore provides 6136N for heavier loads. Because the stroke is only 55mm, side-loading is less of a concern than on longer strokes, but the robust 25mm rod still handles moderate lateral stress well.
When replacing an ISO 15552 cylinder, match the 100mm bore, 55mm nominal stroke, 20mm adjustment range, PT port threads, and your required mounting style. SAIJ supports a specific subset of mounts: Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR options. Note that this specific SKU lacks a magnet, so it cannot host CMSE or DMSE sensors without a configuration change.
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 SAIJ100BX55-20 FAQ
At 0.5 MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 801 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 55mm nominal stroke by up to 20mm. This creates a usable travel window of 35-55mm, which can be fine-tuned during commissioning without changing the cylinder.
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