This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX150, 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 SI63AX150
The AirTAC Airtac SI63 Standard Cylinder SI63AX150 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 SAI63AX150, 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 → SAI63AX150
- 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 SI63AX150
The AirTAC SI63AX150 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 150 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63AX150, a direct replacement sharing the exact ISO 15552 mounting interface, bore, stroke, output force, port size and mounting accessories.
The SAI upgrade features a refined piston seal using two Y-shaped one-way elements for low start-up pressure and extended life. This specific SKU lacks a magnet (-S) and cannot accept a position switch. It uses a SUS420J2 stainless steel rod (-A) for corrosion resistance.
Airtac SI63 Standard Cylinder SI63AX150 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX150 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX150 |
| 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 SAI63AX150 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 SAI63AX150 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 SI63AX150
| 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 SI63AX150 Is Used
Mid-Tonnage Clamping
Holds workpieces securely in machining fixtures using the 1559 N push force, while the SUS420J2 stainless rod resists coolant corrosion.
Package Diversion
Drives sorting arms on packaging lines with a 150 mm stroke, moving loads safely within the 935 N working load limit.
Replacing the Airtac SI63 Standard Cylinder SI63AX150 with the SAI63AX150
To replace the SI63AX150, order the SAI63AX150 and verify your ISO 15552 mounting fixtures, bore, 150 mm stroke, G3/8 port threads (PT/G/NPT) and mounting accessories. Because this SKU has no magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is required, switch to an SAI model with the -S suffix. If you need more force, the neighbouring 80 mm bore yields 2513 N push at 0.5 MPa; if less is acceptable, the 50 mm bore provides 982 N. Note that 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 to hold loads. The SAI family also offers the SAIF variant with a built-in 4M valve for bores 32-100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX150
- ✓ 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 SI63AX150 FAQ
Yes, the SI63AX150 is discontinued. The direct replacement is the SAI63AX150. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 150 mm stroke, output force, G3/8 port and mounting interface.
The bore is 63 mm with a G3/8 air port. Force output 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 maximum of 318 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX150
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX150 replacement — usually within 7-8 hours.