Airtac SAIJ50 Adjustable Cylinder SAIJ50X185-75S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50X185-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 185mm 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
- Stroke185 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 SAIJ50X185-75S
The AirTAC SAIJ50X185-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 982N of push force at 0.5 MPa. The integrated -S magnet enables position detection using AirTAC CMSE reed or DMSE electronic solid-state switches housed in the dual-side sensor grooves. It features a carbon steel piston rod and PT tapered port threads.
This specific SKU provides a generous 110-185mm usable travel window, allowing you to dial back the nominal 185mm stroke by up to 75mm during commissioning. The rear screw functions purely as a mechanical stop to set the end position, meaning it will not hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series.
Airtac SAIJ50 Adjustable Cylinder SAIJ50X185-75S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50X185-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 185 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 SAIJ50X185-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×185 | 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 SAIJ50X185-75S Is Used
Variable End-Stop Tuning
Dial in the exact retraction point within the 110-185mm window during machine setup, avoiding the need to machine custom spacers for different product lengths.
Product Changeover
Quickly adjust the stroke by up to 75mm when switching the packaging line to a new carton size, reducing downtime and keeping the standard ISO 15552 footprint.
Sensor-Driven Positioning
Leverage the built-in -S magnet with CMSE or DMSE switches to confirm end-of-stroke positions across the entire adjustable travel range.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50X185-75S the Right Cylinder?
Choose this 50mm bore when an application requires approximately 982N of push force at 0.5 MPa, or step down to a 40mm bore (628N) if the load is lighter. The 75mm adjustment window is ideal for product changeovers on a packaging line, eliminating the need to physically swap cylinders or bolt on external stops. It utilizes the standard SAIJ mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. To replace an ISO 15552 cylinder, match the 50mm bore, 185mm stroke, PT port threads, and -S magnet requirement. Since the stroke is under 300mm, side-load stress is moderate, but external guides should still be used for heavy lateral loads.
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 SAIJ50X185-75S FAQ
At 0.5 MPa operating pressure, this 50mm bore cylinder provides 982N of push force and 825N of pull force. If higher force is needed, increasing the pressure to 0.7 MPa yields 1374N of push force.
The rear adjuster acts as a mechanical stop that trims the effective travel back from the 185mm nominal stroke, creating a 110-185mm usable window. It only sets the end position and does not lock the load without continuous air pressure.
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