This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX600S, 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 SI63AX600S
The AirTAC Airtac SI63 Standard Cylinder SI63AX600S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 600mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX600S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke600 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX600S
- 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 SI63AX600S
The AirTAC SI63AX600S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore, 600mm stroke, and a SUS420J2 stainless steel rod. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI63AX600S, matching the interface, bore, stroke, force, and mounting.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The -S magnet pairs with legacy CS1-B/DS1-B sensors, while a plain cylinder drifts on air loss as cushions only decelerate.
Airtac SI63 Standard Cylinder SI63AX600S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX600S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX600S |
| Bore size | Ø63 mm |
| Stroke | 600 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 SAI63AX600S 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 SAI63AX600S 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 SI63AX600S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×600 | 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 SI63AX600S Is Used
Long-Stroke Diversion
Executes 600mm package routing on sorting lines where the 1559 N push force easily overcomes carton friction.
Elevated Lowering
Lowers 79 kg vertical payloads smoothly using adjustable end cushions, requiring external guides for stability.
Stainless Rod Actuation
Drives tooling stages in humid washdown zones using the SUS420J2 rod option to resist corrosion.
Replacing the Airtac SI63 Standard Cylinder SI63AX600S with the SAI63AX600S
To replace the SI63AX600S, order the SAI63AX600S. Verify the ISO 15552 mounting interface, the 63mm bore, the 600mm stroke, the G3/8 port, and the -A SUS420J2 rod. The -S magnet works with legacy CS1-B/DS1-B switches, though the SAI uses current AirTAC sensors. For sizing, the 63mm bore yields 1559 N push at 0.5 MPa; dropping to a 50mm bore gives 982 N, while an 80mm bore provides 2513 N. At 600mm, prevent rod bending by using external guides to manage side loads. For load holding on air loss, use an external rod lock or pilot check valve, or specify the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX600S
- ✓ 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 SI63AX600S FAQ
Yes, the SI63AX600S is discontinued. The direct replacement is the SAI63AX600S. It is dimensionally interchangeable per ISO 15552, matching the 63mm bore, 600mm stroke, G3/8 port, and mounting fixtures.
It uses a G3/8 port. Force ratings are 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 SAI63AX600S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX600S replacement — usually within 7-8 hours.