This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX170S, 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 SI63BX170S
The AirTAC Airtac SI63 Standard Cylinder SI63BX170S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 170mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX170S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke170 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX170S
- 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 SI63BX170S
The AirTAC SI63BX170S is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore, 170mm stroke, and a SUS304 stainless piston rod. Delivering 1559 N push at 0.5 MPa via a G3/8 port, its direct replacement is the SAI63BX170S, which shares the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. This magnet-ready (-S) legacy unit pairs with CS1-B/DS1-B switches, and the SAI family introduces lock variants (SAIL/BSAI) the original SI lacked.
Airtac SI63 Standard Cylinder SI63BX170S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX170S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX170S |
| Bore size | Ø63 mm |
| Stroke | 170 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 SAI63BX170S 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 SAI63BX170S 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 SI63BX170S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×170 | 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 SI63BX170S Is Used
Stainless Rod Clamping
Ideal for machining fixtures requiring corrosion resistance, using the SUS304 rod to clamp parts securely with 1559 N of force.
Material Diversion
Actuates diverters on packaging lines, providing reliable 170mm stroke movement at 30-800 mm/s operating speeds.
Replacing the Airtac SI63 Standard Cylinder SI63BX170S with the SAI63BX170S
To replace the SI63BX170S, order the SAI63BX170S. Verify your ISO 15552 mounting fixtures (LB, FA, CA, TC, etc.), the G3/8 air port, and the M16x1.5 rod thread. Because this unit has the -B option, ensure you specify the SUS304 stainless rod on the SAI for corrosion resistance. The -S magnet allows for legacy CS1-B/DS1-B sensors (the SAI uses current AirTAC switches). When sizing, a 50mm bore offers 982 N push @0.5 MPa, while an 80mm bore yields 2513 N; this 63mm bore provides 1559 N. Note that a plain cylinder drifts without live air—the cushion only decelerates end-of-stroke. For load holding, use an external pilot check valve or explore the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX170S
- ✓ 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 SI63BX170S FAQ
Yes, the SI63BX170S is discontinued. The direct replacement is the SAI63BX170S. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 170mm stroke, G3/8 port, and mounting interface.
The bore is 63mm with a G3/8 air port. 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 SAI63BX170S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX170S replacement — usually within 7-8 hours.