Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-40S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 650mm 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
- Stroke650 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 SAIJ50BX650-40S
The AirTAC SAIJ50X650-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 610 to 650 mm, allowing you to dial back the nominal 650 mm stroke by up to 40 mm during machine commissioning without adding external stops. It delivers 982 N of push force at 0.5 MPa and shares the exact mounting footprint of standard ISO 15552 cylinders.
This SKU uses a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for position sensing. It works seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches fitted into the dual-side sensor grooves. The extruded aluminum barrel design omits tie-rods, and the PT tapered port threads ensure a tight, reliable pneumatic connection.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-40S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 650 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 SAIJ50BX650-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×650 | 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 SAIJ50BX650-40S Is Used
Variable End-Stop Tuning
Perfect for dialing in the exact retract distance on packaging machines, letting operators trim travel by up to 40 mm during format changes.
Stainless Rod Clamping
Ideal for manufacturing environments requiring high corrosion resistance, using the SUS304 rod to press or hold components reliably.
Long-Stroke Diverting
Suited for conveyor diverters needing a 610 to 650 mm reach, where the adjustable stop fine-tunes the gate position accurately.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX650-40S the Right Cylinder?
Select this 50 mm bore cylinder when your application requires 982 N push force at 0.5 MPa (or 1374 N at 0.7 MPa). If your setup needs less force, the 40 mm bore offers 628 N at 0.5 MPa; if you require more clamping power, stepping up to the 63 mm bore yields 1559 N at 0.5 MPa. The adjustable stroke is ideal for product changeovers, letting you fine-tune the retract end position on the fly instead of physically swapping out a fixed-stroke SAI cylinder.
Because the nominal stroke is 650 mm, the 20 mm rod and M16x1.5 thread will experience amplified side loads if the load is unsupported. Always guide the tooling externally to prevent rod binding. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true fail-safe load holding without pressure, use an SAIL pneumatic lock or BSAI clamp-lock cylinder. This model uses the reduced SAIJ mounting set: 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 SAIJ50BX650-40S FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. If you increase the pressure to 0.7 MPa, the push force rises to 1374 N.
The rear adjusting screw acts as a mechanical stopper that lets you shorten the effective travel from the 650 mm nominal stroke down to 610 mm. It decelerates and sets the end position but does not lock the load without continuous air pressure.
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