Airtac SAIJ40 Adjustable Cylinder SAIJ40BX35-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX35-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 35mm 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
- Stroke35 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX35-30
The AirTAC SAIJ40X35-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to a 5-35 mm window. It delivers 628 N of push force at 0.5 MPa and uses a PT tapered port. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting.
This specific SKU is built with a SUS304 stainless steel rod for corrosion resistance and lacks a standard magnet. The rear adjuster acts purely as a mechanical stop to set deceleration and end positions without adding external stops. For load-holding without live air pressure, consider the SAIL or BSAI series instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX35-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX35-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 35 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 SAIJ40BX35-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×35 | 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 SAIJ40BX35-30 Is Used
Product Changeover
Dial in the exact end-stop during machine setup for varying product sizes without swapping the cylinder.
End-Position Tuning
Fine-tune the retract position at commissioning to dial out mechanical tolerance and ensure precise alignment.
Short-Stroke Clamping
Ideal for short-stroke clamping tasks where the exact travel distance needs on-site adjustment within a 5-35 mm window.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX35-30 the Right Cylinder?
Choose this 40 mm bore when you need slightly more force than the 32 mm version (402 N at 0.5 MPa) but want to step down from the 63 mm class (1559 N). The 30 mm adjustment range on a 35 mm nominal stroke provides maximum flexibility for product-size changeovers on a line. The PT port thread and SUS304 rod make it suitable for environments where corrosion resistance is required.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 35 mm stroke, 30 mm adjustment, PT port, and the absence of a magnet (-S). The reduced mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 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 SAIJ40BX35-30 FAQ
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder provides a push force of 628 N and a pull force of 528 N. It can reach a maximum push force of 1130 N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 35 mm nominal stroke by up to 30 mm, giving an effective usable travel window of 5 to 35 mm. It sets the end position but does not lock the load without live air pressure.
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