This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X600SLB, 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 SI63X600SLB
The AirTAC SI63 Standard Cylinder SI63X600SLB 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 SAI63X600SLB, 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 → SAI63X600SLB
- 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 SI63X600SLB
The AirTAC SI63X600SLB is a discontinued double-acting ISO 15552 profile cylinder featuring a 63mm bore, 600mm stroke, and an LB foot mount. Built with an extruded aluminum barrel and a G3/8 port, it delivers a push force of 1559 N at 0.5 MPa. Because this SI unit is end-of-life, you should order the direct replacement: the SAI63X600SLB. It shares the same ISO 15552 mounting interface, bore, stroke, output force, and port size, dropping directly into existing fixtures.
The SAI upgrade introduces an improved piston seal utilizing two Y-shaped one-way elements for extended life and lower start-up pressure. The -S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family adds SAIL lock, SAIF valve, and BSAI clamp-lock variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X600SLB Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X600SLB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X600SLB |
| 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 SAI63X600SLB 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 SAI63X600SLB 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 SI63X600SLB
| 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 SI63X600SLB Is Used
Long-Stroke Material Transfer
Pushes heavy pallets or workpieces along a conveyor line over a 600mm distance, utilizing the 1559 N push force at 0.5 MPa to overcome initial friction.
Large Fixture Actuation
Actuates oversized clamping fixtures or indexing arms where a 63mm bore and extended travel are required to reach distant tooling points.
Replacing the Airtac SI63 Standard Cylinder SI63X600SLB with the SAI63X600SLB
To replace the discontinued SI63X600SLB, order the SAI63X600SLB. Verify your ISO 15552 LB foot mount interface, 63mm bore, 600mm stroke, G3/8 port, and the -S magnet for CS1-B/DS1-B switches (the SAI uses current AirTAC switches). If you need more force, the 80mm bore yields 2513 N push at 0.5 MPa; if less is required, the 50mm bore provides 982 N. Because this is a 600mm stroke, prevent rod bending by guiding the load externally to avoid side-load damage. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X600SLB
- ✓ 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 SI63X600SLB FAQ
Yes, the AirTAC SI63X600SLB is discontinued. The direct replacement is the SAI63X600SLB. It is dimensionally interchangeable per the ISO 15552 mounting interface, matching the 63mm bore, 600mm stroke, LB mount, and G3/8 port.
The bore is 63mm with a G3/8 air port. The thrust is 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. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X600SLB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X600SLB replacement — usually within 7-8 hours.