This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX105, 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 SI63BX105
The AirTAC Airtac SI63 Standard Cylinder SI63BX105 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 105mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX105, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke105 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX105
- 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 SI63BX105
The AirTAC SI63BX105 is a discontinued double-acting ISO 15552 profile cylinder featuring a SUS304 stainless steel rod and a 105 mm stroke. Delivering 1559 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI63BX105. This direct successor matches the exact bore, force, port, and ISO 15552 mounting interface. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life.
Because this specific SKU lacks a magnet (-S), it cannot accept a position switch. Note that a plain cylinder drifts without live air; the cushion only decelerates near stroke end. For secure load holding, consider the SAIL or BSAI lock variants.
Airtac SI63 Standard Cylinder SI63BX105 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX105 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX105 |
| Bore size | Ø63 mm |
| Stroke | 105 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 SAI63BX105 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 SAI63BX105 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 SI63BX105
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×105 | 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 SI63BX105 Is Used
Stainless Rod Diverters
Ideal for diverting packages on food-grade or washdown conveyor lines where the SUS304 rod resists corrosion.
Mid-Force Clamping Jigs
Provides reliable 1559 N clamping force at 0.5 MPa for holding aluminum or composite parts during machining.
Replacing the Airtac SI63 Standard Cylinder SI63BX105 with the SAI63BX105
To replace the discontinued SI63BX105, order the SAI63BX105. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), the G3/8 port thread (PT/G/NPT), and the M16x1.5 rod thread. Since this is a no-S SKU, it cannot support sensing; if switches are needed, select an SAI63X105S and use current AirTAC sensors. For sizing, the 63 mm bore yields 1559 N push at 0.5 MPa; dropping to a 50 mm bore gives 982 N, while an 80 mm bore provides 2513 N. A plain cylinder does not hold load on air loss, so for vertical applications use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX105
- ✓ 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 SI63BX105 FAQ
Yes, the SI63BX105 is discontinued. The direct replacement is the SAI63BX105. It shares the same ISO 15552 mounting interface, 63 mm bore, 105 mm stroke, G3/8 port, and output force, fitting existing fixtures perfectly.
This 63 mm bore cylinder features a G3/8 air port and an M16x1.5 rod thread. It delivers 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX105
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX105 replacement — usually within 7-8 hours.