This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX375S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI63 Standard Cylinder SI63AX375S
The AirTAC Airtac SI63 Standard Cylinder SI63AX375S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 375mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX375S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke375 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX375S
- 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 SI63 Standard Cylinder SI63AX375S
The AirTAC SI63AX375S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 375mm stroke. It delivers 1559 N push and 1402 N pull at 0.5 MPa through a G3/8 port. The direct replacement is the SAI63AX375S, matching the bore, stroke, force, and ISO 15552 mounting interface.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure. This -A variant uses a SUS420J2 stainless rod, and the -S magnet pairs with legacy CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63AX375S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX375S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX375S |
| 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, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI63AX375S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / 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 | |
The SAI63AX375S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI63 Standard Cylinder SI63AX375S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×375 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI63 Standard Cylinder SI63AX375S Is Used
Pallet Diversion
Routes heavy pallets along a 375mm stroke conveyor lane using 1559 N of thrust at 0.5 MPa.
Packaging Pusher
Stages corrugated cartons into a sealing station with the SUS420J2 stainless rod option.
Replacing the Airtac SI63 Standard Cylinder SI63AX375S with the SAI63AX375S
To replace the SI63AX375S, order the SAI63AX375S. Confirm the ISO 15552 mounting interface, G3/8 port, M16x1.5 rod thread, and the -S magnet for CS1-B/DS1-B switches. Sizing both ways: a 50mm bore yields 982 N [email protected], while an 80mm bore yields 2513 N. For this 375mm stroke, use external guides to prevent rod bending and side-load wear. The cushion only decelerates; for load holding on air loss, use the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX375S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI63 Standard Cylinder SI63AX375S FAQ
Yes, the SI63AX375S is discontinued. The direct replacement is the SAI63AX375S. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 375mm stroke, output force, G3/8 port, and mounting fixtures.
The 63mm bore uses a G3/8 port. It generates 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a theoretical max of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX375S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX375S replacement — usually within 7-8 hours.