Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 350mm 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
- Stroke350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-50S
The AirTAC SAIJ40X350-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force and 528N of pull force at 0.5 MPa, utilizing a G1/4 port and a 16mm piston rod. The integrated -S magnet enables position sensing with AirTAC CMSE reed and DMSE electronic switches.
This specific SKU provides a 350mm nominal stroke that can be fine-tuned down by up to 50mm, creating a precise 300-350mm usable travel window. Built with a SUS304 stainless steel rod (code B) and PT tapered port threads, it handles demanding environments while allowing exact end-position calibration at commissioning without external stops.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 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 SAIJ40BX350-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 SAIJ40BX350-50S Is Used
Product Changeover
Dial in the 300-350mm travel window during format size changes on a packaging line, avoiding the need to physically swap cylinders for different part lengths.
Machine Setup
Fine-tune the exact retract end-position at commissioning using the rear screw, eliminating the need to bolt on custom external mechanical stops.
Variable End Stops
Adjust the stroke dynamically on a diverter gate to handle varying package depths without reprogramming the entire pneumatic control system.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX350-50S the Right Cylinder?
Choose this adjustable-stroke model when your machine setup requires variable end-stops or product changeover flexibility, dialing back the travel within the 300-350mm range instead of swapping a fixed-stroke SAI cylinder. If your application requires less force, stepping down to a 32mm bore yields 402N push at 0.5 MPa; stepping up to a 50mm bore provides 982N. To replace an ISO 15552 cylinder, match the 40mm bore, 350mm stroke, 50mm adjustment, PT port, and -S magnet.
Because the 350mm stroke is relatively long, the 16mm rod still requires an external guide to prevent excessive side-loading. Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding without pressure, consider an AirTAC SAIL or BSAI cylinder. SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ40BX350-50S FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 50mm. This creates a usable travel window of 300-350mm, letting you set the exact retract end-position at commissioning. The adjuster acts as a mechanical stop and does not lock the load without live air pressure.
At 0.5 MPa operating pressure, this double-acting cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
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 SAIJ40BX350-50S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.