This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X15, 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 SI63X15
The AirTAC Airtac SI63 Standard Cylinder SI63X15 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 15mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X15, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke15 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X15
- 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 SI63X15
The AirTAC SI63X15 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 15 mm stroke, delivering 1559 N push force at 0.5 MPa through its G3/8 port. AirTAC replaced this legacy unit with the SAI63X15. This current-production direct maintains the exact ISO 15552 mounting interface, bore, stroke, force, port and mounting accessories, fitting existing fixtures perfectly.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. Note this specific SKU lacks a magnet (-S) and cannot accept a CS1-B/DS1-B sensor.
Airtac SI63 Standard Cylinder SI63X15 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X15 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X15 |
| Bore size | Ø63 mm |
| Stroke | 15 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 SAI63X15 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 SAI63X15 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 SI63X15
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×15 | 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 SI63X15 Is Used
Short-Stroke Clamping
Ideal for holding parts during machining, using the 1559 N push force to secure components firmly within a tight 15 mm travel envelope.
Package Diverting
Provides rapid actuation for routing small to medium items on a production line, taking advantage of the 30-800 mm/s speed range.
Ejector Mechanisms
Delivers a fast, compact ejection punch for finished goods, with the 1402 N pull force safely retracting the mechanism.
Replacing the Airtac SI63 Standard Cylinder SI63X15 with the SAI63X15
To replace the SI63X15, order the SAI63X15 direct equivalent, verifying your ISO 15552 mounting interface (LB, FA, TC, etc.), G3/8 port thread (PT/G/NPT) and M16x1.5 rod-end connection. Because this 15 mm stroke SKU has no magnet, it cannot support position sensing; if switches are needed, select an SAI63X15S and use current AirTAC sensors. Sizing context: the 63 mm bore yields 1559 N push at 0.5 MPa, sitting between the 50 mm (982 N) and 80 mm (2513 N) options. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding consider the SAIL or BSAI lock variants, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X15
- ✓ 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 SI63X15 FAQ
Yes, the AirTAC SI63X15 is discontinued. The direct replacement is the SAI63X15. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 15 mm stroke, output force, G3/8 port and mounting interface.
The 63 mm bore features a G3/8 air port and M16x1.5 rod thread. It generates 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 maximum theoretical force of 318 kgf at 1.0 MPa.
Request a Quote for the SAI63X15
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X15 replacement — usually within 7-8 hours.