This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX90, 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 SI63AX90
The AirTAC Airtac SI63 Standard Cylinder SI63AX90 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 90mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX90, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke90 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX90
- 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 SI63AX90
The AirTAC SI63AX90 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 90 mm stroke, delivering 1559 N push force at 0.5 MPa. It features a G3/8 port, M16x1.5 rod thread, and 30 mm adjustable cushions. The direct replacement is the SAI63AX90, matching the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. This SKU uses an SUS420J2 stainless rod (-A) for corrosion resistance and lacks a magnet, meaning it cannot accept CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63AX90 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX90 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX90 |
| Bore size | Ø63 mm |
| Stroke | 90 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 SAI63AX90 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 SAI63AX90 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 SI63AX90
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×90 | 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 SI63AX90 Is Used
Corrosive Clamping
Ideal for holding metal parts in machining fixtures where the SUS420J2 stainless rod resists moisture and coolant spray.
Transfer Diverters
Provides the 1559 N push force needed to actuate routing gates on 63 mm bore packaging lines at 0.5 MPa.
Pallet Stops
Functions as a robust 90 mm stroke end-stop for roller conveyors, safely halting loads up to the 935 N working limit.
Replacing the Airtac SI63 Standard Cylinder SI63AX90 with the SAI63AX90
To replace the SI63AX90, order the SAI63AX90 and confirm the ISO 15552 interface, 90 mm stroke, G3/8 port, and SUS420J2 rod. Since this SKU lacks a magnet (-S), it cannot support position sensing. For sizing, the neighboring 50 mm bore yields 982 N push at 0.5 MPa, while the 80 mm bore provides 2513 N. Note that a plain cylinder drifts on air loss as the cushion only decelerates; for load holding, specify an external pilot check valve or the SAIL/BSAI lock variants. The SAI family also adds the SAIF self-valve option for bores 32-100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX90
- ✓ 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 SI63AX90 FAQ
Yes, the SI63AX90 is discontinued. The direct replacement is the SAI63AX90, which shares the identical ISO 15552 mounting interface, 63 mm bore, 90 mm stroke, force, and G3/8 port, fitting existing fixtures perfectly.
It features a G3/8 air port and delivers 1559 N push / 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a 318 kgf theoretical max at 1.0 MPa.
Request a Quote for the SAI63AX90
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX90 replacement — usually within 7-8 hours.