Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 100mm 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
- Stroke100 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-40S
The AirTAC SAIJ40X100-40-S is a double-acting ISO 15552 profile cylinder engineered with a rear stroke adjuster, allowing you to dial back the nominal 100 mm travel by up to 40 mm. This yields a highly flexible 60-100 mm usable stroke window, letting you fine-tune end positions at commissioning without swapping hardware. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa.
Built for demanding environments, this variant features a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for CMSE reed and DMSE solid-state sensors. It uses PT tapered port threads (G1/4), incorporates adjustable air cushions at both ends, and relies on an extruded aluminum barrel with sensor grooves on both sides.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 100 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 SAIJ40BX100-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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 SAIJ40BX100-40S Is Used
Machine Changeovers
Dial in the exact 60-100 mm end position during product size changes without replacing the cylinder or adding external stopper blocks.
Assembly End-Tuning
Fine-tune the clamping travel at commissioning to accommodate material thickness variations, ensuring precise force application.
Variable Diverter Stops
Adjust the retract stop on the fly to handle different package sizes on a single conveyor line without mechanical rework.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX100-40S the Right Cylinder?
Choose this adjustable-stroke model when your machine setup requires variable end-stops or frequent product changeovers, avoiding the need to bolt on external stops or buy multiple fixed-stroke SAI cylinders. If you need higher force, stepping up to the 50 mm bore yields 982 N of push at 0.5 MPa; dropping to a 32 mm bore reduces it to 402 N. Because the 100 mm stroke is under 300 mm, side-load stress is minimal, though the M12x1.25 rod thread handles lateral loads well.
Remember that the rear adjuster acts purely as a mechanical travel stop, not a lock; this SAIJ cylinder will not hold a load without live air pressure. For true fail-safe load holding, consider the SAIL or BSAI series. This -S variant is dimensionally interchangeable per ISO 15552 and uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ40BX100-40S FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 1130 N of push force.
The rear adjuster screw lets you shorten the nominal 100 mm stroke by up to 40 mm, creating a usable travel window of 60 to 100 mm. The adjuster acts as a mechanical stop to set the end position, but it is not a lock and cannot hold the load without continuous air pressure.
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