This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX115S, 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 SI63BX115S
The AirTAC Airtac SI63 Standard Cylinder SI63BX115S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 115mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX115S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke115 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX115S
- 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 SI63BX115S
The AirTAC SI63BX115S is a discontinued double-acting ISO 15552 profile cylinder featuring a 63mm bore, 115mm stroke, and a SUS304 stainless steel piston rod. It delivers 1559 N push force at 0.5 MPa and uses a G3/8 air port. The direct replacement is the SAI63BX115S, which shares identical ISO 15552 mounting dimensions, output force, and accessories.
The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life. The original -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family expands capabilities with SAIL, SAIF, and BSAI lock variants.
Airtac SI63 Standard Cylinder SI63BX115S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX115S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX115S |
| Bore size | Ø63 mm |
| Stroke | 115 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 SAI63BX115S 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 SAI63BX115S 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 SI63BX115S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×115 | 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 SI63BX115S Is Used
Stainless Rod Actuation
Ideal for packaging lines requiring corrosion resistance, utilizing the SUS304 rod to push 1559 N loads reliably.
Mid-Stroke Diverting
The 115mm stroke handles product diverting on conveyors, providing precise 935 N working load transfers.
Replacing the Airtac SI63 Standard Cylinder SI63BX115S with the SAI63BX115S
To replace the SI63BX115S, order the SAI63BX115S. Confirm the ISO 15552 mounting interface, 63mm bore, 115mm stroke, G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). The -S magnet and -B SUS304 rod are retained. When sizing, note the 63mm bore yields 1559 N push at 0.5 MPa; dropping to a 50mm bore gives 982 N, while an 80mm bore provides 2513 N. A plain cylinder drifts on air loss, so for load holding select the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX115S
- ✓ 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 SI63BX115S FAQ
Yes, the SI63BX115S is discontinued. The direct replacement is the SAI63BX115S. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 115mm stroke, G3/8 port, and mounting interface.
The 63mm bore features a G3/8 port and M16x1.5 rod thread. It delivers 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 SAI63BX115S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX115S replacement — usually within 7-8 hours.