This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX30, 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 SI63BX30
The AirTAC Airtac SI63 Standard Cylinder SI63BX30 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 30mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX30, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke30 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX30
- 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 SI63BX30
The AirTAC SI63BX30 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 30 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI63BX30, which shares the exact ISO 15552 mounting interface, bore, stroke and output force.
This specific SKU features a SUS304 stainless steel piston rod for corrosion resistance, but lacks a magnet so it cannot accept position switches. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure.
Airtac SI63 Standard Cylinder SI63BX30 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX30 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX30 |
| Bore size | Ø63 mm |
| Stroke | 30 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 SAI63BX30 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 SAI63BX30 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 SI63BX30
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×30 | 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 SI63BX30 Is Used
Stainless Rod Clamping
Short 30 mm stroke clamping of machined parts in humid washdown areas using the SUS304 rod option.
Ejector Mechanism
Provides 1559 N push at 0.5 MPa to eject finished components from a fixture quickly and reliably.
Gate Diverting
Actuates light diverting gates on a conveyor line where a 79 kg vertical lift capacity is sufficient.
Replacing the Airtac SI63 Standard Cylinder SI63BX30 with the SAI63BX30
To replace the SI63BX30, order the SAI63BX30. Confirm the ISO 15552 mounting interface, 63 mm bore, 30 mm stroke, G3/8 port (PT/G/NPT thread options) and your specific mounting accessory. This -B variant uses a SUS304 stainless rod; if sensing is required, switch to an -S magnet version using CS1-B/DS1-B switches. Sizing both ways: a 50 mm bore offers 982 N [email protected], while an 80 mm bore yields 2513 N. Note that a plain cylinder drifts on air loss; for load holding use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX30
- ✓ 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 SI63BX30 FAQ
Yes, the SI63BX30 is discontinued. The direct replacement is the SAI63BX30. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 30 mm stroke, force and G3/8 port.
The bore is 63 mm with a G3/8 port. Force output is 1559 N push and 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 SAI63BX30
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX30 replacement — usually within 7-8 hours.