This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX990SH, 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 SI63BX990SH
The AirTAC Airtac SI63 Standard Cylinder SI63BX990SH is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 990mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX990SH, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke990 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX990SH
- 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 SI63BX990SH
The AirTAC SI63BX990SH is a discontinued double-acting ISO 15552 profile cylinder featuring a 63mm bore, 990mm stroke, SUS304 stainless piston rod (-B), piston magnet (-S) and Viton H high-temperature seals (0-150 C). Delivering 1559 N push at 0.5 MPa, its direct replacement is the SAI63BX990SH, which preserves the exact G3/8 port, M16x1.5 thread and mounting interface.
The SAI 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 lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63BX990SH Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX990SH |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX990SH |
| Bore size | Ø63 mm |
| Stroke | 990 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 SAI63BX990SH 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 SAI63BX990SH 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 SI63BX990SH
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×990 | 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 SI63BX990SH Is Used
Stainless Actuation
The SUS304 rod excels in corrosive washdown environments, driving 1559 N push force for automated machinery requiring strict hygiene standards.
High-Temp Transfer
With Viton H seals rated up to 150 C, this 990mm stroke unit handles long-distance product diversion and gating in hot industrial ovens.
Replacing the Airtac SI63 Standard Cylinder SI63BX990SH with the SAI63BX990SH
To replace the SI63BX990SH, order the SAI63BX990SH direct equivalent, confirming the ISO 15552 mounting interface, 990mm stroke, G3/8 port and Viton H seal. The -S magnet supports legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). At 0.5 MPa it yields 1559 N push and 1402 N pull; neighbouring bores are 50mm (982 N) and 80mm (2513 N). Because a 990mm stroke risks rod bending under side-load, use external guides. Note: the cushion only decelerates; for load holding on air loss, use an external rod lock or pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX990SH
- ✓ 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 SI63BX990SH FAQ
Yes, the SI63BX990SH is discontinued. The direct replacement is the SAI63BX990SH. It is dimensionally interchangeable per ISO 15552, matching the 63mm bore, 990mm stroke, G3/8 port, SUS304 rod, magnet and mounting fixtures.
It features a G3/8 air port and M16x1.5 rod thread. Force output is 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX990SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX990SH replacement — usually within 7-8 hours.