Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-75
The AirTAC SAIJ40X145-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a usable travel window of 70-145 mm. Delivering 879N of push force at 0.7 MPa, it uses a PT tapered G1/4 port and a 16mm stainless steel (SUS304) rod. The extruded aluminum barrel includes sensor grooves on both sides for straightforward positioning feedback.
This adjustable-stroke model allows you to fine-tune the retract end position during commissioning without swapping the cylinder or adding external stops. The rear adjuster acts strictly as a travel stop for deceleration and does not hold the load without live air pressure. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 145 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 SAIJ40BX145-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×145 | 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 SAIJ40BX145-75 Is Used
Machine Changeover
Dial in the 70-145 mm travel window during product size changeovers without replacing the cylinder or bolting on external stops.
Variable End-Stop
Set precise retract end-positions at commissioning to fine-tune the stroke for varying material thicknesses on the fly.
Assembly Calibration
Use the 879N push force and 75mm adjustment buffer to perfectly time pressing operations across different tooling setups.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-75 the Right Cylinder?
Choose this 40mm bore cylinder when an application requires a 70-145 mm stroke window and around 879N of push force at 0.7 MPa. If your changeover requirements demand less force, stepping down to a 32mm bore yields 563N, while stepping up to a 50mm bore provides 1374N. The 75mm adjustment range is ideal for product-size changeovers on a line.
Because the rear screw is a stop and not a lock, this SAIJ model will not hold a load without continuous air pressure; for fail-safe load holding, consider an SAIL or BSAI cylinder. To match this ISO 15552 replacement exactly, specify a 40mm bore, 145mm stroke, 75mm adjustment, PT port thread, SUS304 rod, and no magnet.
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 SAIJ40BX145-75 FAQ
The rear adjuster screw lets you shorten the nominal 145 mm stroke by up to 75 mm, creating a 70-145 mm usable travel window. It acts as a mechanical stop to fine-tune the end position without adding external stops.
At 0.7 MPa operating pressure, the SAIJ40X145-75 provides 879N of push force and 528N of pull force. It operates at speeds between 30 and 800 mm/s.
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 SAIJ40BX145-75
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.