Airtac SAIJ50 Adjustable Cylinder SAIJ50BX500-75S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX500-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 500mm 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
- Stroke500 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 SAIJ50BX500-75S
The AirTAC SAIJ50X500-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 500 mm travel back by up to 75 mm. This creates a 425-500 mm usable stroke window, allowing you to fine-tune the retract end-position at commissioning without adding external stops. It delivers 982 N of push force and 825 N of pull force at 0.5 MPa, making it well-suited for moderate-load handling tasks.
This variant is configured with a SUS304 stainless steel rod for corrosion resistance, a PT tapered port thread, and an integrated magnet (-S) for position sensing. The extruded aluminum barrel includes sensor grooves on both sides, accepting AirTAC CMSE reed and DMSE electronic solid-state switches. The rear adjuster acts purely as a mechanical stop to set the travel end; it does not lock or hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX500-75S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX500-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 500 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 SAIJ50BX500-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×500 | 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 SAIJ50BX500-75S Is Used
Variable Length Stops
Dial in the retract position within the 425-500 mm window to accommodate different carton sizes on a packaging line without swapping cylinders.
Machine Commissioning
Fine-tune the end-stop during setup to absorb mechanical tolerances, ensuring precise retract positions before finalizing the machine build.
Product Changeover
Quickly adjust the travel end for different product lengths on a conveyor sorting system, reducing downtime between production runs.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX500-75S the Right Cylinder?
Choose this 50 mm bore when you need a 425-500 mm travel window and around 982 N of thrust at 0.5 MPa. If your application requires less force, stepping down to a 40 mm bore yields 628 N push force, while stepping up to a 63 mm bore provides 1559 N. The adjustable stroke is ideal for product changeovers on a packaging line where you need a variable end-stop rather than a fixed-stroke SAI cylinder. For load-holding without continuous air pressure, this cylinder is not a lock; you would need to specify a SAIL or BSAI model instead.
Because the 500 mm stroke is long, the 20 mm rod diameter and M16x1.5 rod thread face increased side-load risks. An external guide rail is highly recommended to prevent rod binding. This SAIJ model uses the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and is dimensionally interchangeable per ISO 15552.
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 SAIJ50BX500-75S FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder generates 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 screw acts as a mechanical stop that shortens the 500 mm nominal stroke by up to 75 mm, providing a usable travel window of 425-500 mm. It only sets the travel end and does not lock the load without live air pressure.
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Covers non-human-caused product damage.
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