This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX600, 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 SI63BX600
The AirTAC Airtac SI63 Standard Cylinder SI63BX600 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 SAI63BX600, 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 → SAI63BX600
- 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 SI63BX600
The AirTAC SI63BX600 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 600 mm stroke. It features a SUS304 stainless piston rod (-B option) for corrosion resistance, a G3/8 air port, M16x1.5 rod thread, and delivers 1559 N push force at 0.5 MPa. The direct replacement is the SAI63BX600, which shares the exact same ISO 15552 mounting interface, bore, stroke, and port size.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. As this SKU lacks the -S magnet, it cannot accept a sensor switch. The SAI family also adds SAIL, SAIF, and BSAI lock variants absent from the SI line.
Airtac SI63 Standard Cylinder SI63BX600 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX600 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX600 |
| 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 SAI63BX600 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 SAI63BX600 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 SI63BX600
| 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 SI63BX600 Is Used
Long-Stroke Diversion
Drives large package pushers or sorting gates over a 600 mm travel where the 1559 N thrust at 0.5 MPa easily overcomes lateral friction on conveyor lines.
Guided Lowering Press
Lowers heavy platens or press heads; ensure external linear guides carry the side-load to prevent rod bending across the extended 600 mm stroke.
Replacing the Airtac SI63 Standard Cylinder SI63BX600 with the SAI63BX600
To replace the discontinued SI63BX600, order the SAI63BX600. It is a direct per ISO 15552 mounting dimensions, keeping the 63 mm bore, 600 mm stroke, G3/8 port, and SUS304 rod. Because this is a no-S SKU, it cannot take a magnetic switch; if sensing is needed, select an SAI63X600S. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve for load holding, or specify an SAIL/BSAI lock variant. At 600 mm stroke, prevent rod bending by guiding the load externally. Neighbouring bores: 50 mm gives 982 N push at 0.5 MPa; 80 mm gives 2513 N.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX600
- ✓ 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 SI63BX600 FAQ
Yes, the SI63BX600 is discontinued. The direct replacement is the SAI63BX600. It is dimensionally interchangeable per ISO 15552, matching the 63 mm bore, 600 mm stroke, G3/8 port, and mounting interface, so it drops directly into existing fixtures.
The bore is 63 mm with a G3/8 air port. The thrust ratings are: 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. The rod is SUS304 stainless steel with an M16x1.5 thread.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX600
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX600 replacement — usually within 7-8 hours.