Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-30S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 30mm 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
- Stroke30 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-30S
The AirTAC SAIJ40X30-30-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and features a 16mm piston rod with an M12x1.25 thread. By turning the rear adjustment screw, you can trim the 30mm nominal stroke back by up to 30mm, creating a highly precise 0-30mm usable travel window for exact end-position tuning during commissioning.
This variant includes a -S magnet for position sensing with CMSE reed and DMSE electronic switches. It is built with a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel provides standard sensor grooves on both sides, and the mounting interface is dimensionally interchangeable with ISO 15552 cylinders.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-30S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 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 SAIJ40BX30-30S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 SAIJ40BX30-30S Is Used
End-Position Tuning
Dial in the exact 0-30mm travel distance during machine commissioning to perfect a pressing or clamping operation without adding external stops.
Product Changeover
Quickly adjust the rear stopper to accommodate slightly different product sizes on a single line, maximizing setup flexibility.
Short-Stroke Clamping
Use the precise travel window to clamp delicate workpieces safely, relying on the SUS304 rod for corrosion resistance in varied environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-30S the Right Cylinder?
Choose this adjustable-stroke model when you need to dial in a very short end-stop on the fly without swapping cylinders or adding external stops. If your application requires less force, stepping down to a 32mm bore yields 402N at 0.5 MPa. If you need more thrust, a 50mm bore provides 982N. Because the stroke is short, side-load stress on the M12x1.25 rod is minimal, but the load must still be guided externally.
The rear adjuster functions strictly as a travel stop to decelerate the piston, not as a lock. It will not hold a load without live air pressure. For true fail-safe load holding, use an SAIL air-released lock, a BSAI clamp-lock, or an external pilot-operated check valve. This SKU matches ISO 15552 mounting dimensions with 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 SAIJ40BX30-30S FAQ
At 0.5 MPa, this 40mm bore cylinder generates 628N of push force and 528N of pull force. It can reach up to 1130N of push force at 0.9 MPa.
The rear adjuster acts as a stop that lets you shorten the 30mm nominal stroke by up to 30mm, providing a 0-30mm usable travel window. It only sets the travel end and does not lock the load without live air pressure.
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