Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 155mm 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
- Stroke155 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-20S
The AirTAC SAIJ100X155-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 155 mm nominal stroke by up to 20 mm for a precise 135-155 mm usable travel window. Built with a SUS304 stainless steel rod, it delivers robust thrust, pushing 5497 N at 0.7 MPa and pulling 3681 N. The integrated magnet supports position sensing via AirTAC CMSE reed or DMSE electronic solid-state switches.
Instead of adding external stops during product changeovers, the rear adjusting screw fine-tunes the retract end-position directly at commissioning. This extruded aluminum profile cylinder features sensor grooves on both sides and uses a PT G1/2 port. Remember that the adjuster acts only as a travel stop to set deceleration alongside the air cushions; it does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 155 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 SAIJ100BX155-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×155 | 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 SAIJ100BX155-20S Is Used
Machine Changeover
Quickly fine-tune the 135-155 mm retract end-position during product size changes without bolting on external stops or replacing the cylinder.
Variable End Stops
Ideal for assembly lines needing slight adjustments to the final position to accommodate part tolerances on the fly.
High-Force Positioning
Leverages 5497 N of push force at 0.7 MPa to move heavy fixtures while allowing 20 mm of rear travel adjustment for exact placement.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX155-20S the Right Cylinder?
Select this 100 mm bore when an 80 mm bore (providing 3518 N push at 0.7 MPa) cannot meet your force requirements, but you want to avoid stepping up to a 125 mm cylinder. The adjustable 135-155 mm window is ideal for machines requiring variable end-stops or fine commissioning tweaks without swapping out a fixed-stroke SAI cylinder. For a true ISO 15552 replacement match, verify the 155 mm stroke, 20 mm adjustment, PT G1/2 port, SUS304 rod, and -S magnet.
Because the stroke is under 300 mm, side-load risks are moderate, but the 25 mm rod and M20x1.5 thread provide solid rigidity for typical loads. If your application requires holding a load without continuous live air, the rear stopper is insufficient; you should consider an external pilot-operated check valve or explore the SAIL or BSAI locking cylinder variants.
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 SAIJ100BX155-20S FAQ
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the 155 mm nominal stroke by up to 20 mm, creating a 135-155 mm usable travel window. It sets the end position and works with the air cushion for deceleration, but it does not lock or hold the load without live air pressure.
At 0.7 MPa, it provides 5497 N of push force and 3681 N of pull force. The -S suffix indicates an integrated magnet compatible with AirTAC CMSE reed switches and DMSE electronic solid-state sensors mounted in the dual-side barrel grooves.
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