Airtac SAIJ50 Adjustable Cylinder SAIJ50BX180-40
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX180-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 180mm 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
- Stroke180 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 SAIJ50BX180-40
The AirTAC SAIJ50X180-40 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a 982N pull force at 0.5 MPa and provides a usable travel window of 140-180mm, letting you dial back the nominal 180mm stroke by up to 40mm. The barrel is extruded aluminum with sensor grooves on both sides for straightforward position feedback.
This variant uses an SUS304 stainless steel rod for corrosion resistance and a PT tapered port thread. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position during commissioning or product changeover. It is not a locking device, so the cylinder cannot hold a load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX180-40 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX180-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 180 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 SAIJ50BX180-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×180 | 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 SAIJ50BX180-40 Is Used
End-Position Tuning
Dial in the exact retract distance within the 140-180mm window during machine setup without swapping cylinders or machining external stopper blocks.
Product Changeover
Quickly adjust the retract stroke by up to 40mm on packaging or assembly lines when running a new product size that requires a slightly shorter travel.
Fixture Positioning
Set precise clamping or positioning endpoints on machining fixtures using the rear stopper, leveraging the 982N pull force for reliable actuation.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX180-40 the Right Cylinder?
Choose this 50mm bore adjustable cylinder when a fixed-stroke SAI cannot accommodate varying end-position requirements without adding external stops. It generates 982N of pull force at 0.5 MPa; stepping down to a 40mm bore drops that to 528N, while moving up to a 63mm bore increases pull force to 1402N. For load-holding without continuous air, consider an SAIL or BSAI cylinder instead, as this model relies on live air.
To match this exact configuration for an ISO 15552 interchange, specify a 50mm bore, 180mm nominal stroke, 40mm adjustment range, PT port thread, SUS304 stainless steel rod, and no magnet. The mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Since the 180mm stroke is under 300mm, side-load concerns are minimal, but long unsupported strokes still require an external guide.
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 SAIJ50BX180-40 FAQ
The rear adjuster is a mechanical stopper that lets you shorten the effective stroke from 180mm down to 140mm. It trims the retract end position during commissioning without needing external stops, but it does not lock or hold the load without live air pressure.
At 0.5 MPa, this 50mm bore cylinder provides a push force of 982N and a pull force of 825N. At 0.7 MPa, the push force increases to 1374N.
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