Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-40
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 550mm 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
- Stroke550 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 SAIJ50BX550-40
The AirTAC SAIJ50X550-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window from 510 to 550 mm. It delivers 982 N of push force at 0.5 MPa, making it well-suited for moderate-load positioning tasks.
This unit is configured with a SUS304 stainless steel rod for superior corrosion resistance and utilizes PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed and DMSE electronic switches if a magnet is added later.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-40 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 550 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 SAIJ50BX550-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×550 | 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 SAIJ50BX550-40 Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 510-550 mm window during machine commissioning to perfect product seating without external stopper blocks.
Product Changeover
Quickly adjust the stroke distance on a packaging line when switching to a different package size, saving downtime on the factory floor.
Long-Stroke Positioning
Move moderate loads across a 550 mm span while leveraging the SUS304 rod for corrosion resistance in humid manufacturing environments.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-40 the Right Cylinder?
Choose this 50 mm bore when you need more force than the 40 mm version provides 628 N at 0.5 MPa, but want a smaller footprint than the 63 mm bore. The 40 mm adjustment range is ideal for product changeovers, allowing you to shift the end-stop without physically swapping the cylinder or adding external stops. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Because the 550 mm stroke is quite long, the 20 mm diameter rod will experience greater deflection under side loads; an external guide rail is highly recommended to prevent premature seal wear. Remember that the rear adjuster is a travel stop, not a lock; for fail-safe load holding without live air pressure, select an SAIL or BSAI cylinder instead.
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 SAIJ50BX550-40 FAQ
A rear adjusting screw acts as a mechanical stopper, allowing you to shorten the effective stroke by up to 40 mm. This provides a usable travel window of 510 to 550 mm, which can be fine-tuned during commissioning without disassembling the cylinder.
At a standard 0.5 MPa operating pressure, the 50 mm bore generates 982 N of push force and 825 N of pull force. It can safely operate up to 1.0 MPa, where it achieves a maximum push force of 1963 N.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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