Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 400mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke400 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-10S
The AirTAC SAIJ40X400-10-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 390-400 mm usable travel window. Equipped with a SUS304 stainless steel rod and an integrated magnet, it delivers 628N of push force at 0.5 MPa and uses a PT G1/4 port. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This adjustable-stroke model allows precise end-position tuning during commissioning without adding external stops. It supports speeds of 30-800 mm/s and uses adjustable air cushions at both ends to decelerate the load. The rear screw acts as a travel stop, not a lock, so it cannot hold a load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 400 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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, 30 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX400-10S Is Used
Commissioning Calibration
Dial in the exact 390-400 mm end-stop during machine setup to perfect product seating without machining custom spacers.
Product Changeover
Quickly trim the 10mm stroke window on automated lines when switching to slightly different package lengths.
Material Positioning
Use the precise rear stop to consistently locate materials on a conveyor before downstream processing.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX400-10S the Right Cylinder?
Choose this 40mm bore cylinder when an application requires 628N push force at 0.5 MPa but needs fine end-position tuning over a 390-400 mm window. If your setup demands less force, stepping down to a 32mm bore yields 402N; if you need more clamping power, a 50mm bore provides 982N. The -S magnet enables position feedback via CMSE reed or DMSE electronic sensors.
Because this 400mm stroke exceeds 300mm, the 16mm rod and M12x1.25 thread still require an external guide to prevent side-loading damage on long unsupported travels. For load-holding without continuous air pressure, select an SAIL pneumatic lock cylinder or a BSAI clamp-lock variant instead of relying on the rear adjuster. This SAIJ model supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts.
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 SAIJ40 Adjustable Cylinder SAIJ40BX400-10S FAQ
The rear adjuster screw allows you to shorten the effective travel by up to 10mm, creating a 390-400mm usable window. It acts as a mechanical stop to fine-tune the retract position without swapping the cylinder.
At 0.5 MPa, it provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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