This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX100, 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 SI63AX100
The AirTAC Airtac SI63 Standard Cylinder SI63AX100 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 100mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX100, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke100 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX100
- 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 SI63AX100
The AirTAC SI63AX100 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 100mm stroke. It delivers 1559N push force at 0.5MPa through a G3/8 port. The direct replacement is the SAI63AX100, which maintains the exact same interface, bore, stroke, force, port and mounting. This SKU features a SUS420J2 stainless steel rod (option A) for corrosion resistance. Because it lacks the -S suffix, it cannot accept a magnetic sensor.
The SAI63AX100 upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF and BSAI variants the SI line lacked.
Airtac SI63 Standard Cylinder SI63AX100 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX100 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX100 |
| Bore size | Ø63 mm |
| Stroke | 100 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 SAI63AX100 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 SAI63AX100 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 SI63AX100
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×100 | 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 SI63AX100 Is Used
Machine Tool Clamping
Secures stainless workpieces in CNC machining centers, utilizing the SUS420J2 rod to resist coolant corrosion while providing 1559N of clamping force.
Package Diverting
Actuates diverting arms on packaging lines, where the 100mm stroke quickly pushes cartons to adjacent lanes without requiring magnetic sensing.
Replacing the Airtac SI63 Standard Cylinder SI63AX100 with the SAI63AX100
To replace the SI63AX100, order the SAI63AX100. Confirm the ISO 15552 mounting interface, 63mm bore, 100mm stroke, G3/8 port (PT/G/NPT thread options) and your mounting accessory. This SKU has no magnet (-S), so it cannot take a CS1-B/DS1-B sensor. Sizing both ways: a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX100
- ✓ 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 SI63AX100 FAQ
Yes, the SI63AX100 is discontinued. The direct replacement is the SAI63AX100. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 100mm stroke, output force, G3/8 port and mounting fixtures.
This 63mm bore cylinder features a G3/8 air port. It delivers 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical maximum force of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX100
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX100 replacement — usually within 7-8 hours.