Airtac SAIJ50 Adjustable Cylinder SAIJ50AX165-20
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX165-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 165mm 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
- Stroke165 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 SAIJ50AX165-20
The AirTAC SAIJ50X165-20 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 165 mm nominal stroke that can be dialed back by up to 20 mm, providing a usable travel window of 145-165 mm for precise end-position tuning during commissioning. Driven by a 50 mm bore, it delivers 982 N of push force and 825 N of pull force at 0.5 MPa.
This variant utilizes a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting, while fluid is supplied via PT tapered ports sized at G1/4. The rear adjuster acts purely as a mechanical stop to set the travel end and does not lock the load without live air pressure.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX165-20 Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX165-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 165 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 SAIJ50AX165-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×165 | 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 SAIJ50AX165-20 Is Used
Product Changeover
Dial in the 145-165 mm travel window during format size changes on a packaging line without swapping out the entire actuator.
Machine Setup
Fine-tune the retract end-position at commissioning to perfectly seat components, eliminating the need for external stopper blocks.
Variable End Stops
Adjust the effective stroke on the fly for automated assembly tooling that must accommodate slight variations in part dimensions.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX165-20 the Right Cylinder?
Select this 50 mm bore cylinder when an application requires 982 N push force at 0.5 MPa but demands variable end-stops for product changeovers, rather than relying on a fixed-stroke SAI model. If your setup requires less force, stepping down to a 40 mm bore yields 628 N; if more force is needed, stepping up to a 63 mm bore provides 1559 N. Because the rear screw only trims travel, remember that load-holding without live air requires a SAIL pneumatic lock or external rod lock.
For a direct ISO 15552 replacement match, verify a 50 mm bore, 165 mm stroke, 20 mm adjustment range, PT port threads, and your desired mounting style. SAIJ supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options. Since this unit lacks the -S magnet option, it cannot host CMSE reed or DMSE electronic sensors without modification.
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 SAIJ50AX165-20 FAQ
At 0.5 MPa operating pressure, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. At 0.7 MPa, the push force increases to 1374 N.
The rear adjusting screw acts as a mechanical stop that allows you to shorten the 165 mm nominal stroke by up to 20 mm, creating a usable travel window of 145-165 mm. It decelerates the travel end but does not lock the load without continuous air pressure.
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