Airtac SAIJ50 Adjustable Cylinder SAIJ50BX150-75
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX150-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 150mm 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
- Stroke150 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 SAIJ50BX150-75
The AirTAC SAIJ50X150-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 150 mm travel. This creates a highly flexible 75-150 mm usable stroke window, letting you fine-tune the retract end position during commissioning without swapping out the cylinder or adding external stops. It delivers a robust 982 N push force at 0.5 MPa, making it well-suited for moderate-duty handling tasks.
This variant is built with a SUS304 stainless steel rod (option B) for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches if a magnet is added later. The rear adjuster acts purely as a travel stop to set the end position, so it will not hold the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX150-75 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX150-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 150 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 SAIJ50BX150-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×150 | 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 SAIJ50BX150-75 Is Used
Product Changeover Lines
Dial in the exact retract distance up to 75 mm when switching between packaging sizes, eliminating the need to physically swap cylinders for different product runs.
End-Position Trimming
Fine-tune the final end-stop during machine commissioning to compensate for mechanical tolerances, ensuring precise positioning without external shims.
Corrosive Environment Handling
Leverage the SUS304 stainless steel rod to push or pull medium-duty loads (982 N at 0.5 MPa) in washdown or mildly corrosive manufacturing settings.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX150-75 the Right Cylinder?
Choose this 50 mm bore when you need 982 N of push force at 0.5 MPa, bridging the gap between the 40 mm bore (628 N) and the 63 mm bore (1559 N). An adjustable stroke is highly advantageous here because a 75 mm trim range allows a single cylinder to serve multiple product sizes on a changeover-heavy line. If your process requires the load to be held mechanically without continuous air pressure, a plain SAIJ will not suffice; you should instead look at the SAIL (air-released lock) or BSAI (clamp-lock) variants.
When replacing an ISO 15552 cylinder, match the 50 mm bore, 150 mm stroke, 75 mm adjustment, PT port thread, and your required mounting bracket. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Because the 150 mm stroke is relatively short, side-load stress on the 20 mm rod is minimal, but always ensure standard alignment to prevent premature seal wear.
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 SAIJ50BX150-75 FAQ
The rear adjuster screw acts as a mechanical stop that limits the cylinder's retract stroke. For this model, you can trim the nominal 150 mm stroke back by up to 75 mm, giving an adjustable travel window of 75 to 150 mm. Note that this adjuster is a stop, not a lock; it cannot hold the load without continuous air pressure.
This 50 mm bore cylinder generates 982 N of push force and 825 N of pull force at 0.5 MPa. At the maximum operating pressure of 1.0 MPa, it can deliver up to 200 kgf of push force.
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