Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-10
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 300mm 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
- Stroke300 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-10
The AirTAC SAIJ40X300-10 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 300 mm nominal stroke that can be fine-tuned backward by up to 10 mm, yielding a precise 290-300 mm usable travel window during commissioning. Delivering 879 N of push force at 0.7 MPa, it fits mid-range automation tasks perfectly.
This variant utilizes a SUS304 stainless steel rod (code B) for superior corrosion resistance and includes PT tapered port threads. Because the stroke reaches 300 mm, the 16 mm diameter rod and M12x1.25 rod thread should be paired with an external guide to prevent excessive side loading on the unsupported extended length.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-10 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 SAIJ40BX300-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 SAIJ40BX300-10 Is Used
Machine Changeover
Dial in the 290-300 mm travel window during product size changes without replacing the cylinder or adding external shims.
End-Position Tuning
Fine-tune the retract end-stop during initial commissioning to achieve exact positioning of 879 N push force assemblies.
Variable End Stops
Adjust the stroke by up to 10 mm on packaging lines to accommodate slightly different package lengths on the fly.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX300-10 the Right Cylinder?
Select this 40 mm bore cylinder when an application requires 879 N push force at 0.7 MPa but demands exact end-position tuning without swapping physical components. The 10 mm rear adjuster screw allows you to dial in the 290-300 mm travel window on the fly, which is far more efficient than machining external stops or ordering a custom fixed-stroke SAI cylinder. If your setup needs less force, stepping down to a 32 mm bore yields 563 N; stepping up to a 50 mm bore provides 1374 N.
For an exact ISO 15552 replacement, match the 40 mm bore, 300 mm stroke, 10 mm adjustment code, PT port thread, and standard mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that this unit lacks a magnet; adding an -S suffix is required if you need to track position with CMSE reed or DMSE electronic sensors. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air—use a SAIL or BSAI cylinder for pneumatic locking.
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 SAIJ40BX300-10 FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. It can deliver up to 1130 N push at 0.9 MPa.
The rear adjuster screw allows you to shorten the 300 mm nominal stroke by up to 10 mm, creating a 290-300 mm usable travel window. It functions as a physical stop and does not lock the load without continuous 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 SAIJ40BX300-10
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.