Airtac SAIJ50 Adjustable Cylinder SAIJ50BX175-40
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50BX175-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 175mm 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
- Stroke175 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 SAIJ50BX175-40
The AirTAC SAIJ50X175-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 40 mm. This creates a highly versatile 135-175 mm usable stroke window, letting you fine-tune the retract end position during commissioning without adding external stops or swapping the barrel. Delivering 982 N of push thrust at 0.5 MPa, it is built with a SUS304 stainless steel rod (code B) for superior corrosion resistance in harsh environments.
The integrated variable air cushions at both ends decelerate the load, but the rear adjuster acts purely as a travel stop, not a lock, meaning the cylinder will not hold its load without live air pressure. Mounting options include the reduced SAIJ set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR variants. The extruded aluminum barrel features sensor grooves on both sides, ready to accept AirTAC CMSE reed or DMSE electronic sensors if a magnet is specified later.
Airtac SAIJ50 Adjustable Cylinder SAIJ50BX175-40 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50BX175-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 175 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 SAIJ50BX175-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×175 | 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 SAIJ50BX175-40 Is Used
Machine Setup & Changeover
Dial in the exact 135-175 mm retract distance during product size changes without physically swapping cylinders or adding machined spacers to the machine frame.
Variable End-Stop Positioning
Fine-tune the final end position during commissioning to compensate for mechanical tolerance stack-up, ensuring precise pressing or clamping at the end of the stroke.
Corrosive Environment Actuation
Leverage the SUS304 stainless steel rod for reliable double-acting actuation in wash-down or corrosive manufacturing settings where carbon steel rods would degrade.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50BX175-40 the Right Cylinder?
Choose this 50 mm bore when you need more force than the 40 mm version (628 N at 0.5 MPa) but do not require the heavier 63 mm class (1559 N). The 40 mm adjustment range is perfect for product changeovers on a packaging line, allowing operators to dial in the exact retract distance on the fly instead of machining custom spacers. If your application requires true load-holding without continuous air pressure, step over to the SAIL or BSAI series, as the SAIJ adjuster only sets the travel end.
For ISO 15552 replacement matching, ensure the target unit shares the 50 mm bore, 175 mm nominal stroke, PT tapered port threads, and the desired mounting bracket. Because this is a 175 mm stroke, side-loading is less severe than on long-stroke units, but you should still rely on an external guide rail for heavy offset loads to protect the 20 mm diameter rod and M16x1.5 rod thread from 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 SAIJ50BX175-40 FAQ
At a standard operating pressure of 0.5 MPa, the 50 mm bore provides 982 N of push thrust and 825 N of pull thrust. At the maximum pressure of 1.0 MPa, it can deliver up to 200 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 175 mm nominal stroke by up to 40 mm, providing a usable travel window of 135 to 175 mm. It only sets the end position and does not lock the load without live air pressure.
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