Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-30 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 SAIJ40BX145-30
The AirTAC SAIJ40X145-30 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 115-145 mm usable travel window, allowing you to dial back the 145 mm nominal stroke by up to 30 mm during commissioning. This bore delivers 879 N of push force at 0.7 MPa, fitting neatly into medium-duty applications.
Built with a SUS304 stainless steel rod (option B), it handles exposure to moisture or washdowns better than standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides, ready for AirTAC CMSE reed or DMSE electronic switches if you add a magnet later. The rear adjuster acts purely as a mechanical stop to set the retracted end position, so it will not hold a load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-30 |
|---|---|
| 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 SAIJ40BX145-30
| 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 SAIJ40BX145-30 Is Used
Machine Changeover
Dial in the 115-145 mm travel window during product size changes without adding external stopper blocks to the machine frame.
End-Position Tuning
Fine-tune the retract stroke precisely during commissioning to perfect the timing of packaging or handling mechanisms.
Washdown Assembly
Leverage the SUS304 stainless steel rod for corrosion resistance in food or light washdown environments while adjusting travel on the fly.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-30 the Right Cylinder?
Choose this 40 mm bore when you need precise end-position tuning without swapping components; for higher force, step up to the 50 mm bore which provides 1374 N push at 0.7 MPa. The PT tapered port threads (G1/4) and M12x1.25 rod thread ensure robust mechanical connections. To match an ISO 15552 replacement, specify bore 40, stroke 145, 30 mm adjustment, PT port, and your required mounting from the SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2 (this series omits FB, CA, CB, and CR). Since the 145 mm stroke is under 300 mm, side-load stress is manageable, but an external guide is still recommended for heavy lateral loads. For load-holding without continuous air pressure, select the SAIL or BSAI series instead, as the SAIJ adjuster is a stop, not a lock.
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 SAIJ40BX145-30 FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke by up to 30 mm, creating a 115-145 mm usable travel window. It sets the end position but does not lock or hold the load without live air pressure.
At a standard 0.7 MPa operating pressure, the SAIJ40X145-30 generates 879 N of push force and 528 N of pull force. It can deliver up to 1130 N push force at its maximum 0.9 MPa 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 SAIJ40BX145-30
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.