This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX90, 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 SI63BX90
The AirTAC Airtac SI63 Standard Cylinder SI63BX90 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 SAI63BX90, 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 → SAI63BX90
- 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 SI63BX90
The AirTAC SI63BX90 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 90 mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. This -B variant uses a SUS304 stainless piston rod for corrosion resistance. As an SKU without a magnet, it cannot accept a position switch.
The direct replacement is the SAI63BX90, retaining the exact ISO 15552 mounting interface, stroke and force. The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life.
Airtac SI63 Standard Cylinder SI63BX90 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX90 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX90 |
| 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 SAI63BX90 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 SAI63BX90 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 SI63BX90
| 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 SI63BX90 Is Used
Stainless Rod Clamping
Uses the SUS304 rod to securely clamp machined parts in humid wash-down cells without risking corrosion pitting.
Mid-Force Diverting
Provides the 1559 N push at 0.5 MPa needed to swing heavy divert gates on packaging conveyors reliably.
Pallet Stop Gate
Acts as a robust 90 mm stroke stop mechanism for loaded pallets, safely decelerating moving loads.
Replacing the Airtac SI63 Standard Cylinder SI63BX90 with the SAI63BX90
To replace the SI63BX90, order the SAI63BX90. Confirm the ISO 15552 interface, 90 mm stroke, G3/8 port (PT/G/NPT thread) and mounting accessory. If you need position sensing, note this no-S SKU lacks a magnet; you must specify an SAI63X90S with a magnet and current AirTAC switches. For sizing, neighbouring bores are 50 mm (982 N push @0.5 MPa) and 80 mm (2513 N). A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variants. The SAIF variant adds a built-in valve if needed.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX90
- ✓ 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 SI63BX90 FAQ
Yes, the SI63BX90 is discontinued. The direct replacement is the SAI63BX90. It is dimensionally interchangeable per ISO 15552, keeping the same 63 mm bore, 90 mm stroke, 1559 N force, G3/8 port and mounting fixtures.
This double-acting cylinder has a G3/8 port, M16x1.5 rod thread, 30 mm cushions and operates at 30-800 mm/s. Force output is 1559 N push / 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a maximum theoretical force of 318 kgf at 1.0 MPa.
Request a Quote for the SAI63BX90
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX90 replacement — usually within 7-8 hours.