Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-20S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-20S 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 SAIJ50BX550-20S
The AirTAC SAIJ50X550-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 982N of push force at 0.5 MPa and features a 530-550mm usable travel window, allowing you to dial back the nominal 550mm stroke by up to 20mm during commissioning. This built-in adjuster eliminates the need to swap cylinders or add external stops when fine-tuning end positions.
This specific configuration includes a SUS304 stainless steel rod for superior corrosion resistance and a magnetic piston (-S) for position sensing. The extruded aluminum barrel integrates sensor grooves on both sides, seamlessly accepting AirTAC CMSE reed and DMSE electronic solid-state switches. It uses PT tapered ports and operates at speeds between 30-800mm/s.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-20S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-20S |
|---|---|
| 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 SAIJ50BX550-20S
| 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 SAIJ50BX550-20S Is Used
Machine Changeover
Quickly fine-tune the 530-550mm travel end-stop during product size changeovers on a packaging line without swapping out the actuator.
End-Position Tuning
Dial in the exact retraction point during initial commissioning to perfect material feeding or pressing operations using the rear adjustment screw.
Variable Diverting
Adjust the stroke on the fly for a conveyor diverting arm to handle different package lengths accurately without adding external mechanical stops.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX550-20S the Right Cylinder?
Choose this 50mm bore when an application requires around 982N push force at 0.5 MPa; stepping down to a 40mm bore drops the force to 628N, while an 80mm bore provides 2513N. An adjustable stroke is ideal for machine setups requiring variable end-stops or frequent product-size changeovers without replacing the entire actuator. Because the 550mm stroke is relatively long, ensure external guiding is used to prevent excessive side-loading on the rod.
For an exact ISO 15552 replacement, match the 50mm bore, 550mm stroke, 20mm adjustment, PT port thread, and -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding without pressure, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ50BX550-20S FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel from the nominal 550mm down to 530mm, creating a 530-550mm usable window. It only sets the travel end and does not lock or hold the load without continuous air pressure.
At an operating pressure of 0.5 MPa, the SAIJ50X550-20-S provides 982N of push force and 825N of pull force. At 0.7 MPa, the push force increases to 1374N.
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 SAIJ50BX550-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.