This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX600S, 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 SI63BX600S
The AirTAC Airtac SI63 Standard Cylinder SI63BX600S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 600mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX600S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke600 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX600S
- 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 SI63BX600S
The AirTAC SI63BX600S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 600 mm stroke. Featuring a SUS304 stainless steel piston rod (-B) and a built-in magnet (-S) for legacy CS1-B/DS1-B switches, it delivers 1559 N push and 1402 N pull at 0.5 MPa. The direct replacement is the SAI63BX600S, which retains the exact G3/8 port, M16x1.5 thread, and ISO 15552 mounting interface for a seamless fixture swap.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life, while adding SAIL, SAIF, and BSAI lock or valve variants absent from the SI line. Note that standard cushions only decelerate; they do not hold load on air loss.
Airtac SI63 Standard Cylinder SI63BX600S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX600S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX600S |
| Bore size | Ø63 mm |
| Stroke | 600 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 SAI63BX600S 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 SAI63BX600S 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 SI63BX600S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×600 | 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 SI63BX600S Is Used
Long-Stroke Diverting
Pushes heavy pallets laterally across packaging lines using the 600 mm travel, relying on the 1559 N thrust at 0.5 MPa to overcome friction.
Multi-Stage Clamping
Extends deep into machining cells to secure oversized parts, taking advantage of the adjustable 30 mm cushions to decelerate heavy loads at stroke end.
Replacing the Airtac SI63 Standard Cylinder SI63BX600S with the SAI63BX600S
To replace the discontinued SI63BX600S, order the SAI63BX600S. Verify your ISO 15552 mounting interface (LB, FA, TC, etc.), the G3/8 air port, and the -S magnet requirement for current AirTAC switches. The -B SUS304 rod is essential for corrosive settings. Sizing checks: a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore yields 2513 N, so the 63 mm bore at 1559 N is correctly matched to mid-range tasks. Because the 600 mm stroke exceeds 300 mm, use external guides to prevent rod bending and side-load damage. For load holding on air loss, select the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX600S
- ✓ 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 SI63BX600S FAQ
Yes, the SI63BX600S is discontinued. The direct replacement is the SAI63BX600S. It is dimensionally interchangeable per the ISO 15552 mounting interface, preserving the same 63 mm bore, 600 mm stroke, G3/8 port, and output force to fit existing fixtures directly.
It features a G3/8 air port and provides 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 maximum force of 318 kgf at 1.0 MPa. The operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX600S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX600S replacement — usually within 7-8 hours.