Airtac SAIJ100 Adjustable Cylinder SAIJ100X85-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X85-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 85mm 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
- Stroke85 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X85-20S
The AirTAC SAIJ100X85-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear mechanical stroke adjuster, providing a usable travel window of 65 to 85 mm. Delivering a robust 5497 N of push force at 0.7 MPa, this carbon-steel rod unit is built for high-load positioning. The integrated -S magnet supports AirTAC CMSE reed and DMSE solid-state sensors, which seat directly into the dual-side extruded barrel grooves.
Because the rear adjuster acts purely as a travel stop rather than a locking brake, it cannot hold a load without continuous live air. For true fail-safe load holding, you would need to specify a SAIL or BSAI variant. The SAIJ mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets to streamline setup.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X85-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X85-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 85 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 SAIJ100X85-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×85 | 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 SAIJ100X85-20S Is Used
Machine Changeover
Rapidly adapt end-stops for different product widths on a packaging line without physically replacing the cylinder or adding shims.
Clamping Force Tuning
Leverage the 5497 N push force at 0.7 MPa to secure heavy workpieces, using the 20 mm adjuster to set the exact clamping depth.
Assembly Positioning
Fine-tune the 65 to 85 mm travel window during machine commissioning to guarantee precise part insertion and seating.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X85-20S the Right Cylinder?
Choose this 100 mm bore when a 80 mm bore (3518 N at 0.7 MPa) lacks the thrust for your clamping or lifting cycle, but a 125 mm bore is physically oversized. The 20 mm adjustment range lets you dial in the exact end position during commissioning without machining external hard stops or swapping to a fixed-stroke SAI cylinder. Ensure your replacement matches the 100 mm bore, 85 mm stroke, PT tapered port thread, and the -S magnet requirement.
With an 85 mm nominal stroke, the unsupported rod length is minimal, so side-load stress on the M20x1.5 rod thread is naturally low. Still, always guide the load externally to prevent binding. Note that the variable air cushions at both ends manage end-of-cycle deceleration, but they do not function as mechanical brakes.
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 SAIJ100X85-20S FAQ
At a 0.7 MPa operating pressure, this 100 mm bore cylinder generates 5497 N of push force and 5243 N of pull force. It can reach a maximum push force of 801 kgf at 1.0 MPa.
The rear adjuster screw allows you to shorten the effective travel from the nominal 85 mm down to 65 mm. This provides a 20 mm tuning window to set the exact retract end-position without replacing the cylinder.
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