Airtac SAIJ50 Adjustable Cylinder SAIJ50BX500-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX500-20 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 SAIJ50BX500-20
The AirTAC SAIJ50X500-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window down to 480-500 mm without adding external stops. Delivering 982 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and features PT tapered port threads (G1/4) for a reliable pneumatic seal.
This adjustable-stroke unit utilizes an extruded aluminum barrel with sensor grooves on both sides, ready for future CMSE or DMSE switches if a magnet is added later. The rear adjuster functions strictly as a travel stop to dial in the end position during commissioning; it does not hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX500-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX500-20 |
|---|---|
| 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 SAIJ50BX500-20
| 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 SAIJ50BX500-20 Is Used
Product Changeover Tuning
Dial in the exact end-of-stroke position within a 480-500 mm window during product size changes, eliminating the need to physically swap cylinders or reposition external hard stops.
Machine Setup Calibration
Fine-tune the retract end-position during initial commissioning to perfectly align tooling, absorbing minor mechanical tolerances without altering the fixed 500 mm nominal stroke.
Adjustable Ejection Stroke
Modify the ejection distance on a conveyor line by trimming up to 20 mm off the standard travel, ensuring delicate items are pushed accurately without damage.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX500-20 the Right Cylinder?
Choose this 50 mm bore when an application requires moderate thrust (982 N push at 0.5 MPa) but might need slight end-position tuning during product changeover, avoiding the need to physically swap a fixed-stroke SAI cylinder. If your setup demands higher force, stepping up to the 63 mm bore yields 1559 N, while dropping to a 40 mm bore reduces output to 628 N.
Because the 500 mm stroke is substantial, the 16 mm rod should be guided externally to prevent excessive side-loading and premature seal wear. For any load-holding requirements without continuous air pressure, this cylinder's adjuster will not act as a brake—consider an AirTAC SAIL or BSAI series instead. It 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 SAIJ50 Adjustable Cylinder SAIJ50BX500-20 FAQ
At a 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 acts as a mechanical stop that lets you shorten the effective travel from the nominal 500 mm down to as little as 480 mm. This allows precise end-position tuning during setup without replacing the cylinder.
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