Airtac SAIJ50 Adjustable Cylinder SAIJ50BX425-50S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX425-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 425mm 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.
- BoreØ50 mm
- Stroke425 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX425-50S
The AirTAC SAIJ50X425-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 375-425 mm usable travel window from its 425 mm nominal stroke. It delivers 982 N of push force and 825 N of pull force at 0.5 MPa, making it a robust choice for mid-range actuation. The barrel is extruded aluminum with sensor grooves on both sides, and this variant includes a magnet for position feedback.
This specific SKU is configured with a SUS304 stainless steel rod (option B) for superior corrosion resistance and PT tapered port threads. Because the stroke extends past 300 mm, the 20 mm piston rod and M16x1.5 rod thread will experience higher bending moments under side loads, so an external guide rail is recommended to prevent premature wear.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX425-50S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX425-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 425 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50BX425-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×425 | 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 SAIJ50 Adjustable Cylinder SAIJ50BX425-50S Is Used
Product Changeover
Dial in the retract distance up to 50 mm during format changes on packaging lines without swapping out the entire actuator.
End-Position Tuning
Fine-tune the final resting position during machine commissioning to achieve exact alignment without external mechanical stops.
Variable End Stops
Adjust the stroke window on the fly to handle different product sizes moving down a conveyor without reprogramming the motion controller.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX425-50S the Right Cylinder?
Choose this adjustable model over a fixed SAI when you need to fine-tune the retract position at commissioning or during a product changeover without adding external stops. If you need less force, stepping down to a 40 mm bore yields 628 N of push at 0.5 MPa; if your application requires more clamping power, a 63 mm bore provides 1559 N. The rear adjuster on this cylinder acts only as a travel stop and does not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series. To match this ISO 15552 footprint exactly, specify a 50 mm bore, 425 mm stroke, PT ports, Basic/FA/LB/TC/FTC/TCM1/TCM2 mountings, and the -S magnet option.
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 SAIJ50 Adjustable Cylinder SAIJ50BX425-50S FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 200 kgf.
The rear adjuster allows you to shorten the effective travel by up to 50 mm, creating a 375-425 mm usable stroke window. It functions as a mechanical stop and does not lock the load in place 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 are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ50 Adjustable Cylinder SAIJ50BX425-50S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.