This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX30, 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 SI63AX30
The AirTAC Airtac SI63 Standard Cylinder SI63AX30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 30mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke30 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX30
- 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 SI63AX30
The AirTAC SI63AX30 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore, 30 mm stroke, and an SUS420J2 stainless steel piston rod. Delivering 1559 N push force at 0.5 MPa via a G3/8 port, it is directly replaced by the SAI63AX30. This direct successor shares identical mounting dimensions, bore, stroke, and output force, fitting existing fixtures perfectly.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63AX30 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX30 |
| Bore size | Ø63 mm |
| Stroke | 30 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 SAI63AX30 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 SAI63AX30 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 SI63AX30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×30 | 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 SI63AX30 Is Used
Short-Stroke Clamping
Ideal for securing stainless steel workpieces in machining fixtures, utilizing the 30 mm stroke and corrosion-resistant SUS420J2 rod for reliable 1559 N holding force.
Transfer Line Diverters
Drives compact routing gates on packaging conveyors, where the 63 mm bore provides sufficient thrust to pivot components under dynamic air pressure.
Welding Cell Stops
Positions metal stops in robotic welding cells, benefiting from the ISO 15552 profile barrel and adjustable end cushions to survive harsh industrial environments.
Replacing the Airtac SI63 Standard Cylinder SI63AX30 with the SAI63AX30
To replace the SI63AX30, order the SAI63AX30 to retain the exact 63 mm bore, 30 mm stroke, G3/8 port, M16x1.5 rod thread, and ISO 15552 mounting interface. Because this specific unit has no -S magnet, it cannot support position sensing; if switches are needed, specify a magnet on the SAI order. The standard carbon steel rod is substituted here with the -A SUS420J2 stainless option for corrosion resistance. For sizing context, dropping to a 50 mm bore yields 982 N push at 0.5 MPa, while stepping up to an 80 mm bore provides 2513 N. If you need load holding on air loss, a plain cylinder drifts; use an external pilot check valve or explore the SAIL or BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX30
- ✓ 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 SI63AX30 FAQ
Yes, the AirTAC SI63AX30 is discontinued. The direct replacement is the SAI63AX30. It features the same ISO 15552 mounting interface, 63 mm bore, 30 mm stroke, G3/8 port, and output force, dropping directly into your existing fixtures.
This 63 mm bore double-acting cylinder uses a G3/8 air 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 maximum of 318 kgf at 1.0 MPa.
Request a Quote for the SAI63AX30
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX30 replacement — usually within 7-8 hours.