Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 375mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ63 mm
- Stroke375 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50
The AirTAC SAIJ63X375-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel end-position without swapping out the unit. With a 375 mm nominal stroke and a 50 mm adjustment range, it provides a usable travel window of 325 to 375 mm. This specific SKU delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, making it well-suited for medium-force positioning tasks.
This model features a SUS420J2 stainless steel rod (material code A) for improved corrosion resistance and uses PT tapered port threads with a G3/8 connection. The extruded aluminum barrel includes sensor grooves on both sides, and because no magnet is specified, position sensing can be added later by selecting a version with the -S suffix to support CMSE reed or DMSE electronic solid-state switches.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 375 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×375 | 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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50 Is Used
Machine Changeover
Dial in the exact 325 to 375 mm end-position during product size transitions on a packaging line without replacing the cylinder or adding external spacers.
End-Stop Calibration
Use the rear adjustment screw to fine-tune the retract stroke during initial machine commissioning, ensuring perfect alignment of pressing or clamping heads.
Variable Transfer Stops
Adjust the travel window on the fly for diverter mechanisms that must accommodate different carton lengths on a shared conveyor system.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50 the Right Cylinder?
Choose this 63 mm bore adjustable cylinder when your application requires exact end-stop tuning during commissioning or product changeover, avoiding the need to machine external stops or swap a fixed-stroke SAI cylinder. If your process requires less force, stepping down to a 50 mm bore yields 982 N of push force at 0.5 MPa, while stepping up to an 80 mm bore provides 2513 N for heavier loads. Because the total stroke is 375 mm, an external guide rail is recommended to prevent excessive side-loading on the rod and thread.
This SAIJ model supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options. Remember that the rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure; for true load-holding without continuous air, select an SAIL or BSAI series cylinder instead.
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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-50 FAQ
At an operating pressure of 0.5 MPa, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At the maximum pressure of 1.0 MPa, it delivers up to 318 kgf of push force.
The rear adjuster acts as a mechanical stop that lets you trim the effective travel back by up to 50 mm, creating a usable stroke window of 325 to 375 mm. This adjuster only sets the travel end and decelerates the load via the air cushion; it does not lock or hold the load without live air pressure.
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