Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 950mm 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
- Stroke950 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-40
The AirTAC SAIJ40X950-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 950 mm nominal travel by up to 40 mm for a precise 910 to 950 mm usable window. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, utilizing a G1/4 port and a 16 mm rod. This configuration features a SUS304 stainless steel rod for superior corrosion resistance and PT tapered port threads.
Because the adjuster acts purely as a mechanical stop at the retract end, it cannot hold a load without live air pressure. The extruded aluminum barrel includes sensor grooves on both sides, and while this specific SKU lacks a magnet, adding one enables compatibility with AirTAC CMSE reed and DMSE electronic solid-state switches for position feedback.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 950 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 SAIJ40BX950-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×950 | 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 SAIJ40BX950-40 Is Used
Machine Changeover
Quickly adjust the 910-950 mm travel window during product size changes on a packaging line without replacing the cylinder.
End-Position Tuning
Fine-tune the retract end position at commissioning to dial in exact mechanical stops without machining external spacers.
Corrosive Environments
Leverage the SUS304 stainless steel rod for reliable actuation in washdown or mildly corrosive manufacturing settings.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX950-40 the Right Cylinder?
Select this 40 mm bore when an application requires moderate force—stepping up to a 50 mm bore yields 982 N push force at 0.5 MPa, while dropping to a 32 mm bore provides only 402 N. The adjustable stroke is ideal for machine setup and product changeover, allowing you to fine-tune the end position at commissioning without swapping the cylinder or adding external stops. For a fixed end-of-stroke, the standard SAI cylinder is sufficient.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 950 mm stroke, 40 mm adjustment range, PT port threads, and SUS304 rod material. Note that SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the 950 mm stroke is long and unsupported, an external guide is required to prevent excessive side-loading on the 16 mm rod. For load-holding without live air, consider the SAIL or BSAI series instead of relying on the rear stopper.
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 SAIJ40BX950-40 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 acts as a mechanical stop, allowing you to shorten the 950 mm nominal stroke by up to 40 mm, creating a 910 to 950 mm travel window. It 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 SAIJ40BX950-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.