Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 350mm 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
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-75S
The AirTAC SAIJ63X350-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel by up to 75 mm. This yields a practical usable stroke window of 275 to 350 mm, giving you exact end-position control at commissioning without swapping out the physical barrel. It delivers a robust 1559 N push force at 0.5 MPa, making it well-suited for mid-range actuation tasks.
This variant includes a SUS420J2 stainless steel rod for superior corrosion resistance and is equipped with a magnet for position sensing. The extruded aluminum barrel features sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE solid-state switches. It uses a G3/8 port and offers variable air cushions at both ends to manage deceleration across its 30-800 mm/s speed range.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 350 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 SAIJ63AX350-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×350 | 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 SAIJ63AX350-75S Is Used
Product Changeover Dial-In
Perfect for packaging lines running multiple carton sizes, using the 75 mm adjuster to rapidly shift the 275-350 mm end-stop without changing the cylinder.
Machine Setup Calibration
Fine-tune the final retract position during initial commissioning, ensuring precise alignment of a 1559 N press operation without machining external spacers.
Variable End-Stop Forming
Ideal for light-duty forming or bending stations where the bottoming depth must be tweaked on the fly to accommodate different material thicknesses.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-75S the Right Cylinder?
Selecting this 63 mm bore model provides 1559 N of push thrust at 0.5 MPa, striking a balance between the lighter 50 mm bore (982 N) and the heavier 80 mm bore (2513 N). The 75 mm adjustment range is ideal for product-size changeovers on a production line, allowing you to dial in the exact end-stop without adding external mechanical stops. Because the nominal stroke is 350 mm, the M16x1.5 rod will experience leverage forces over a long unsupported span, so an external guide carriage is strongly recommended to prevent premature seal wear.
When ordering an ISO 15552 replacement, match the 63 mm bore, 350 mm stroke, 75 mm adjustment, PT tapered port threads, and the -S magnet requirement. The SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Remember that the rear adjuster acts only as a travel stop to set the end position; it does not hold the load if air pressure drops. For true fail-safe load holding without live air, use an SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external rod lock.
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 SAIJ63AX350-75S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder generates 1559 N of push thrust and 1402 N of pull thrust. At its maximum 1.0 MPa pressure, it can output up to 318 kgf.
The rear adjuster screw acts as a mechanical stop that shortens the 350 mm nominal stroke by up to 75 mm, providing an effective travel window of 275 to 350 mm. It sets the end position and relies on the air cushion for deceleration, but it is not a lock and will not hold the load without live air pressure.
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