This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X90, 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 SI63X90
The AirTAC Airtac SI63 Standard Cylinder SI63X90 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 SAI63X90, 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 → SAI63X90
- 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 SI63X90
The AirTAC SI63X90 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 90mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI63X90, matching the exact bore, stroke, force, port and ISO 15552 mounting interface.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. Note this non-S SKU lacks a magnet and cannot accept CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X90 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X90 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X90 |
| 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 SAI63X90 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 SAI63X90 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 SI63X90
| 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 SI63X90 Is Used
Mid-Tonnage Clamping
Secures heavy workpieces during machining with 1559N push force, ensuring rigid holding without fixture deflection.
Package Diversion
Actuates sorting gates along material handling lines, providing fast 90mm strokes to redirect heavy goods.
Pallet Stops
Deploys robust stopping barriers at conveyor endpoints, halting loaded pallets using reliable 63mm bore thrust.
Replacing the Airtac SI63 Standard Cylinder SI63X90 with the SAI63X90
To replace the SI63X90, order the SAI63X90. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port thread (PT/G/NPT) and the 90mm stroke. Because this specific SKU lacks the -S magnet suffix, it cannot support position sensing. If sizing alternatives, the 80mm bore offers more force (2513N push at 0.5MPa) while the 50mm bore offers less (982N). A plain cylinder drifts on air loss; for load holding use the SAIL lock or BSAI clamp-lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X90
- ✓ 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 SI63X90 FAQ
Yes, the AirTAC SI63X90 is discontinued. The direct replacement is the SAI63X90. It shares the identical ISO 15552 mounting interface, 63mm bore, 90mm stroke, output force and G3/8 port, fitting existing fixtures perfectly.
This double-acting cylinder features a G3/8 port and M16x1.5 rod thread. 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.
Request a Quote for the SAI63X90
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X90 replacement — usually within 7-8 hours.