Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 40mm 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
- Stroke40 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-30
The AirTAC SAIJ40X40-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 628N of push force at 0.5 MPa and provides a usable travel window of 10-40mm, letting you dial in the exact end position without swapping hardware. This 40mm bore unit uses a PT tapered port thread and a SUS304 stainless steel rod for superior corrosion resistance.
Because the rear stopper acts as a travel limit rather than a locking device, it cannot hold a load without live air pressure. For load-holding requirements, consider an external pilot-operated check valve or the related SAIL lock cylinder. This profile cylinder supports a speed range of 30-800mm/s and includes sensor grooves on both sides for flexible switch mounting.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 40 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 SAIJ40BX40-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 SAIJ40BX40-30 Is Used
Precision Position Tuning
Fine-tune the 10-40mm travel window during machine commissioning to achieve exact end-stops without physically replacing the cylinder.
Product Changeovers
Quickly adjust the rear stopper on packaging lines to accommodate varying product sizes on the fly.
Short-Stroke Clamping
Utilize the 628N push force for clamping delicate components where the exact contact point varies by batch.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX40-30 the Right Cylinder?
Choose this adjustable-stroke model when your application requires frequent product-size changeovers or fine end-position tuning during commissioning, eliminating the need to bolt on external stops. If you need less force, stepping down to a 32mm bore yields 402N at 0.5MPa; stepping up to a 50mm bore provides 982N.
To achieve a drop-in ISO 15552 replacement, match the 40mm bore, 40mm nominal stroke, 30mm adjustment range, PT port thread, and SUS304 rod material. Note that the SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ40BX40-30 FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 30mm. This creates a usable travel window of 10-40mm, meaning you can set the retract end-position anywhere within that range without changing the cylinder.
At a standard operating pressure of 0.5 MPa, the SAIJ40X40-30 provides 628N of push force and 528N of pull force. It can reach up to 1130N push force at 0.9 MPa.
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