Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 375mm 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
- Stroke375 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-40
The AirTAC SAIJ40X375-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel anywhere within a 335 to 375 mm window. Delivering 628 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides.
Because the nominal stroke is 375 mm, the 16 mm rod and M12x1.25 rod thread should be paired with an external guide to handle potential side loads. This adjustable model omits the FB, CA, CB, and CR mounts, offering a reduced set of ISO 15552 attachments (Basic, FA, LB, TC, FTC, TCM1, TCM2) to simplify machine integration.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 375 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 SAIJ40BX375-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×375 | 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 SAIJ40BX375-40 Is Used
Machine Changeover
Quickly reconfigure the end-of-stroke position for different product lengths on a packaging line without replacing the entire actuator.
End-Position Tuning
Fine-tune the 335-375 mm travel window during commissioning to perfect the seating force of a pressing operation.
Variable Diverter Stops
Adjust the retract stop distance on the fly to handle varying package sizes as they move down an assembly conveyor.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX375-40 the Right Cylinder?
Choose this 40 mm bore when you need more thrust than the 32 mm version (402 N at 0.5 MPa) but want to avoid the larger footprint of a 50 mm cylinder. The adjustable 335-375 mm travel window is ideal for product changeovers, letting you dial in the exact end position without swapping cylinders or adding external stops. At 375 mm, the stroke is well within the 1200 mm maximum for this bore, but an external guide is recommended to support the rod.
For a drop-in ISO 15552 replacement, match the 40 mm bore, 375 mm stroke, 40 mm adjustment range, PT ports, and your required mounting hardware. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; if you need true load-holding, consider the SAIL or BSAI series instead.
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 SAIJ40BX375-40 FAQ
At a 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. It can reach up to 1130 N of push force at 0.9 MPa.
The rear adjuster screw allows you to shorten the effective travel by up to 40 mm, creating a usable stroke window of 335 to 375 mm. It acts as a physical stop to set the end position and is not a lock, meaning the cylinder requires live air to hold its load.
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 SAIJ40BX375-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.