This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX220, 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 SI63BX220
The AirTAC Airtac SI63 Standard Cylinder SI63BX220 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 SAI63BX220, 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 → SAI63BX220
- 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 SI63BX220
The AirTAC SI63BX220 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 220mm stroke. It delivers 1559N push and 1402N pull at 0.5MPa via a G3/8 port. The direct replacement is the SAI63BX220, which matches the bore, stroke, force, port and ISO 15552 mounting interface. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. This -B variant uses a SUS304 stainless piston rod for corrosion resistance, but lacks a magnet so it cannot take a sensor.
The standard cylinder does not hold load on air loss; the cushion only decelerates. For secure holding, use an external rod lock or the SAIL/BSAI lock variants.
Airtac SI63 Standard Cylinder SI63BX220 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX220 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX220 |
| 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 SAI63BX220 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 SAI63BX220 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 SI63BX220
| 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 SI63BX220 Is Used
Stainless Rod Clamping
Ideal for packaging or food-grade fixtures where the SUS304 rod resists washdown corrosion while providing 1559N of clamping thrust.
Pallet Stop Gates
Acts as a heavy-duty stopper on roller conveyors, using its 1402N pull force to retract the gate and allow pallet passage.
Replacing the Airtac SI63 Standard Cylinder SI63BX220 with the SAI63BX220
To replace the SI63BX220, order the SAI63BX220. Confirm the ISO 15552 mounting interface, 63mm bore, 220mm stroke, G3/8 port (PT/G/NPT thread options) and your mounting accessory. Because this SKU lacks the -S magnet, it cannot accept a CS1-B/DS1-B sensor; if position sensing is needed, switch to an SAI63BX220S. Sizing both ways: a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. For loads needing 1559N at 0.5MPa, this 63mm bore is correct. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, specify an external pilot check valve or the SAIL/BSAI lock variant. At 220mm stroke, side-load is minimal, but ensure front mounting alignment to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX220
- ✓ 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 SI63BX220 FAQ
Yes, the SI63BX220 is discontinued. The direct replacement is the SAI63BX220. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 220mm stroke, 1559N force, G3/8 port and mounting interface, but features an upgraded two Y-shaped element piston seal.
This double-acting cylinder uses a G3/8 port and delivers 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa. It operates at 30-800mm/s with a 30mm adjustable cushion at each end.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX220
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX220 replacement — usually within 7-8 hours.