Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-40
The AirTAC SAIJ40X350-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 350 mm stroke with a 40 mm adjustment range, yielding a usable travel window of 310-350 mm for precise end-position tuning during commissioning. Delivering 628 N of push force at 0.5 MPa, it utilizes a SUS304 stainless steel rod for superior corrosion resistance.
This extruded aluminum profile cylinder includes sensor grooves on both sides for flexible switch mounting. It operates at speeds of 30-800 mm/s and relies on adjustable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 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 SAIJ40BX350-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 SAIJ40BX350-40 Is Used
Machine Changeover
Dial in the 310-350 mm stroke window during product size changes without bolting on external physical stops.
Variable End Positioning
Fine-tune the exact retraction point on packaging lines to accommodate different carton lengths on the fly.
Commissioning Calibration
Precisely set the rear stopper during initial setup to perfect the end-of-stroke deceleration without replacing the actuator.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-40 the Right Cylinder?
Choose this 40 mm bore when you need 628 N push force at 0.5 MPa, stepping up from a 32 mm bore (402 N) if higher thrust is required, or down from a 50 mm bore (982 N) to save space. The adjustable 310-350 mm travel window is ideal for machine setups requiring variable end stops without swapping cylinders. Because the stroke is 350 mm, ensure an external guide supports the load to prevent excessive side-loading on the rod.
The rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure; for pneumatic locking, consider the SAIL or BSAI series. For a drop-in ISO 15552 replacement, match the 40 mm bore, 350 mm stroke, PT tapered port threads, and the SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, 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 SAIJ40BX350-40 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 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw allows you to shorten the effective stroke by up to 40 mm, creating a 310-350 mm usable travel window. This stopper only sets the end position and does not lock the load without live air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.