Airtac SAIJ100 Adjustable Cylinder SAIJ100X55-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X55-20S 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 SAIJ100X55-20S
The AirTAC SAIJ100X55-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 35 to 55 mm for precise end-position tuning. Delivering 3927 N of push force at 0.5 MPa, it handles heavy loads without needing a cylinder swap during product changeovers. This version includes a magnet for position sensing and uses a PT tapered port thread.
The 25 mm carbon steel rod and M20x1.5 thread provide robust resistance against side loads, though external guides remain recommended for optimal alignment. You can mount this unit using the SAIJ subset of Basic, FA, LB, TC, FTC, TCM1, or TCM2 hardware, as it omits the FB, CA, CB, and CR options. The integrated sensor grooves on both sides accept CMSE reed or DMSE electronic solid-state switches.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X55-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X55-20S |
|---|---|
| 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 SAIJ100X55-20S
| 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 SAIJ100X55-20S Is Used
End-Stop Tuning
Dial in the exact 35 to 55 mm retract position during machine commissioning to perfect part ejection without machining new spacers.
Product Changeover
Quickly adjust the stroke length by up to 20 mm on the fly to accommodate slightly different product sizes on the same production line.
Heavy Clamping
Leverage the 3927 N push force at 0.5 MPa to secure heavy workpieces, relying on the adjuster to set the precise clamping depth.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X55-20S the Right Cylinder?
Choose this 100 mm bore when a smaller 80 mm cylinder lacks thrust, as stepping up from the 80 mm bore (2513 N push at 0.5 MPa) to this model yields 3927 N at the same pressure. The adjustable stroke is selected over a fixed SAI cylinder when commissioning requires fine-tuning the retract end-position without adding external stops. For load-holding without live air pressure, note that the rear adjuster acts only as a travel stop and not a lock; you should instead specify an SAIL or BSAI cylinder, or use an external pilot-operated check valve.
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 SAIJ100X55-20S 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 screw allows you to shorten the 55 mm nominal stroke by up to 20 mm, creating a usable travel window of 35 to 55 mm. It functions as a travel stop for end-position tuning and does not lock the load without live air.
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