This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX220S, 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 SI63BX220S
The AirTAC Airtac SI63 Standard Cylinder SI63BX220S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 220mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX220S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke220 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX220S
- 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 SI63BX220S
The AirTAC SI63BX220S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 220mm stroke. Featuring a SUS304 stainless steel rod and a built-in magnet for CS1-B/DS1-B switches, it delivers 1559 N push force at 0.5 MPa through a G3/8 port. AirTAC replaced this EOL unit with the SAI63BX220S, a direct replacement matching the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
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. Note that a plain cylinder drifts without live air; use an external rod lock or pilot check valve for load holding.
Airtac SI63 Standard Cylinder SI63BX220S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX220S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX220S |
| Bore size | Ø63 mm |
| Stroke | 220 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 SAI63BX220S 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 SAI63BX220S 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 SI63BX220S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×220 | 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 SI63BX220S Is Used
Stainless Rod Clamping
Uses the SUS304 rod for corrosion resistance when actuating grippers or clamps in washdown manufacturing cells.
Mid-Stroke Diversion
Provides 1559 N push at 0.5 MPa to push heavy packages onto secondary conveyor lines without full extension.
Replacing the Airtac SI63 Standard Cylinder SI63BX220S with the SAI63BX220S
To replace the discontinued SI63BX220S, order the SAI63BX220S. It drops directly into existing fixtures via the identical ISO 15552 mounting interface, matching the 63mm bore, 220mm stroke, G3/8 port, and M16x1.5 rod thread. Confirm your mounting accessory (LB, FA, TC, etc.) and retain the -S magnet for current AirTAC switches. The -B rod is SUS304 stainless steel, ideal for corrosive environments. If you need higher force, the 80mm bore yields 2513 N push at 0.5 MPa; if smaller, the 50mm bore provides 982 N. Because stroke is 220mm, ensure guide alignment to prevent rod bending under side loads. For load holding on air loss, the cushion only decelerates; specify the SAIL lock or BSAI clamp-lock variant, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX220S
- ✓ 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 SI63BX220S FAQ
Yes, the SI63BX220S is discontinued. The direct replacement is the SAI63BX220S. It shares the identical ISO 15552 mounting interface, 63mm bore, 220mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
The 63mm bore features a G3/8 air port and M16x1.5 rod thread. Force ratings are: 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 max of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX220S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX220S replacement — usually within 7-8 hours.