Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-30 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 SAIJ40BX30-30
The AirTAC SAIJ40X30-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position. With a nominal 30 mm stroke and a 30 mm adjustment code, this model provides a highly versatile 0-30 mm usable travel window, effectively allowing the stroke to be dialed back to a near-zero retracted position for precise machinery setup.
It delivers 628 N of push force and 528 N of pull force at 0.5 MPa. This specific configuration includes a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel incorporates sensor grooves on both sides, and the mounting interface supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-30 |
|---|---|
| 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 SAIJ40BX30-30
| 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 SAIJ40BX30-30 Is Used
Precision End-Stop Tuning
Dial in the exact retracted position within a 0-30 mm window during machine commissioning without machining external stopper blocks.
Product Size Changeover
Quickly adjust the stroke distance on packaging lines when switching between different product sizes or formats.
Corrosive Clamping
Utilize the SUS304 stainless steel rod for clamping tasks in environments where moisture or mild chemicals are present.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX30-30 the Right Cylinder?
Choose this 40 mm bore cylinder when an application requires 628 N of push force at 0.5 MPa, stepping up from a 32 mm bore (402 N) for heavier clamping or lifting. The adjustable stroke is ideal for product changeovers, letting operators set variable end-stops without adding external stops or swapping cylinders. For fixed travel without rear adjustment, the standard SAI series is sufficient.
Because the stroke is short, side-loading is minimal, but always ensure the M12x1.25 rod thread is aligned with the load. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for pneumatic locking without pressure, consider the SAIL or BSAI series. This model is dimensionally interchangeable with ISO 15552 cylinders of the same bore and stroke.
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 SAIJ40BX30-30 FAQ
At an operating pressure of 0.5 MPa, the SAIJ40X30-30 provides 628 N of push force and 528 N of pull force. It can reach up to 879 N push force at 0.7 MPa.
The rear adjuster screw allows you to shorten the effective travel by up to 30 mm. Since the nominal stroke is 30 mm, this creates a 0-30 mm usable travel window, letting you set the exact end position during commissioning without replacing the cylinder.
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