Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 400mm 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
- Stroke400 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-20S
The AirTAC SAIJ100X400-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 3927N push force at 0.5 MPa and features a usable travel window of 380 to 400mm, letting you dial back the nominal 400mm stroke by up to 20mm. The integrated magnet supports position detection using CMSE reed switches or DMSE solid-state sensors.
This model uses a robust 25mm carbon steel rod with an M20x1.5 thread, paired with G1/2 PT ports. The extruded aluminum barrel incorporates sensor grooves on both sides, and the variable air cushions at both ends absorb kinetic energy at the travel limits. The rear adjuster acts purely as a mechanical stop to fine-tune the end position and does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 400 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 SAIJ100X400-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×400 | 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 SAIJ100X400-20S Is Used
Machine Changeover
Dial in the exact 380-400mm end-stop during product size transitions without replacing the cylinder or re-engineering fixed external stops.
Assembly Positioning
Fine-tune the clamping or pressing end-point on an automated line to accommodate slight material thickness variations using the rear adjuster.
Conveyor Diverter
Set precise retract positions for sorting gates, allowing flexible stroke limits while maintaining the high 3927N thrust needed to move heavy goods.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-20S the Right Cylinder?
Choose this adjustable-stroke SAIJ model when you need precise end-position tuning during commissioning or product changeover without swapping the cylinder or adding external stops. If your application requires less force, stepping down to an 80mm bore yields 2513N push force at 0.5 MPa; if you need more power, a 125mm bore provides 6136N.
Because the stroke is 400mm, the long unsupported piston rod requires an external guide to prevent excessive side-loading and premature seal wear. For load-holding without continuous air pressure, pair this cylinder with an external rod lock or select the AirTAC SAIL or BSAI series. To match this exact ISO 15552 replacement, specify: 100mm bore, 400mm stroke, 20mm adjustment, G1/2 PT ports, standard carbon steel rod, and the -S magnet option.
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 SAIJ100X400-20S FAQ
At 0.5 MPa operating pressure, this 100mm bore cylinder provides 3927N of push force and 3681N of pull force. It can reach a maximum push force of 7068N at 0.9 MPa.
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the effective travel from the 400mm nominal stroke down to 380mm. This creates a 380-400mm usable window for fine-tuning the end position at commissioning.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ100 Adjustable Cylinder SAIJ100X400-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.