Airtac SAIJ50 Adjustable Cylinder SAIJ50BX450-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX450-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 450mm 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
- Stroke450 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 SAIJ50BX450-20
The AirTAC SAIJ50X450-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 20 mm. This creates a usable stroke window of 430 to 450 mm, letting you dial in the exact end position during commissioning without swapping out the unit or adding external stops. It delivers 982 N of push thrust at 0.5 MPa, making it well-suited for medium-force handling tasks.
This specific SKU is configured with a SUS304 stainless steel rod for superior corrosion resistance and includes PT tapered port threads. The extruded aluminum barrel features sensor grooves on both sides for direct mounting of position switches. Note that the rear adjuster acts purely as a mechanical travel stop for deceleration and positioning; it does not hold the load without live air pressure, so applications requiring true fail-safe holding should utilize a SAIL or BSAI series cylinder instead.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX450-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX450-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 450 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 SAIJ50BX450-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×450 | 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 SAIJ50BX450-20 Is Used
Machine Changeover
Fine-tune the 430-450 mm travel window during product size changeovers to set precise end positions without machining new hard stops.
Variable End Stops
Adjust the retract position on the fly for conveyor sorting tasks where the physical stopping point must match varying package dimensions.
Corrosive Handling
Leverage the SUS304 stainless steel rod for medium-force clamping or positioning in environments where standard carbon steel rods would rust.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX450-20 the Right Cylinder?
Choose this 50 mm bore when your application requires around 982 N of push force at 0.5 MPa, stepping up from a 40 mm bore that provides 628 N, or down from a 63 mm bore offering 1559 N. The adjustable stroke is specifically beneficial for machine setups requiring variable end-stops or fine-tuning during product changeovers, rather than relying on a fixed-stroke SAI cylinder. Because the nominal stroke is 450 mm, an external guide is recommended to prevent excessive side-loading on the rod and thread.
To achieve a true ISO 15552 replacement match, verify the 50 mm bore, 450 mm stroke, 20 mm adjustment range, PT G1/4 port, and the required mounting interface. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR brackets. This model uses a SUS304 stainless steel rod and does not include a magnet for sensors.
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 SAIJ50BX450-20 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 of push force.
The rear adjuster screw acts as a mechanical stop that lets you shorten the nominal 450 mm stroke by up to 20 mm, providing a usable travel window of 430 to 450 mm. It is a travel stop for end-position tuning, not a lock, and will not hold the load without live air pressure.
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