This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X150SLB, 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 SI63X150SLB
The AirTAC Airtac SI63 Standard Cylinder SI63X150SLB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 150mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X150SLB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke150 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X150SLB
- 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 SI63X150SLB
The AirTAC SI63X150SLB is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 150mm stroke. It delivers 1559N push and 1402N pull at 0.5MPa through a G3/8 port. AirTAC replaced this EOL unit with the SAI63X150SLB, a direct sharing the exact same interface, force, and LB foot mount.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. The -S magnet works with legacy CS1-B/DS1-B sensors, while a Viton H seal option raises heat to 150C.
Airtac SI63 Standard Cylinder SI63X150SLB Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X150SLB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X150SLB |
| Bore size | Ø63 mm |
| Stroke | 150 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 SAI63X150SLB 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 SAI63X150SLB 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 SI63X150SLB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×150 | 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 SI63X150SLB Is Used
Clamp Actuation
Secures heavy workpieces in machining centers, utilizing the 1559N push force to hold parts firmly against cutting forces.
Package Diversion
Drives mechanical pop-up arms at 30-800mm/s to route heavy cartons on assembly lines, benefiting from the LB foot mount stability.
Pallet Lift Gates
Raises and lowers 79kg vertical load gates in packaging zones, operating reliably within the 0.15-1.0MPa pressure range.
Replacing the Airtac SI63 Standard Cylinder SI63X150SLB with the SAI63X150SLB
To replace this SI with the SAI63X150SLB, verify the 63mm bore, 150mm stroke, G3/8 port, M16x1.5 rod thread, and LB foot mount. The SAI drops into existing ISO 15552 fixtures effortlessly. Sizing both ways: a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. The -S magnet accepts CS1-B/DS1-B switches.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X150SLB
- ✓ 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 SI63X150SLB FAQ
Yes, the SI63X150SLB is discontinued. The direct replacement is the SAI63X150SLB. It shares the identical ISO 15552 mounting interface, 63mm bore, 150mm stroke, G3/8 port, and LB foot mount, fitting existing fixtures perfectly.
This 63mm bore double-acting cylinder features a G3/8 air port and M16x1.5 rod thread. It outputs 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X150SLB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X150SLB replacement — usually within 7-8 hours.