This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X630S, 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 SI63X630S
The AirTAC Airtac SI63 Standard Cylinder SI63X630S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 630mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X630S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke630 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X630S
- 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 SI63X630S
The AirTAC SI63X630S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 630 mm stroke. It delivers a thrust of 1559 N at 0.5 MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63X630S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, output force, and stroke.
The SAI successor features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. The SAI family also introduces lock variants like the SAIL and BSAI that the original SI lacked. Because this SKU includes the -S magnet, it supports legacy CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X630S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X630S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X630S |
| Bore size | Ø63 mm |
| Stroke | 630 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 SAI63X630S 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 SAI63X630S 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 SI63X630S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×630 | 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 SI63X630S Is Used
Long-Stroke Diversion
Pushes packages across a 630 mm transfer lane using 1559 N thrust at 0.5 MPa, requiring external guides to prevent rod bending.
Press Ejection
Ejects formed parts from a press using 2182 N force at 0.7 MPa, relying on adjustable 30 mm air cushions for end-of-stroke deceleration.
Replacing the Airtac SI63 Standard Cylinder SI63X630S with the SAI63X630S
To replace the SI63X630S, order the SAI63X630S. Confirm the ISO 15552 mounting interface (LB, FA, TC, etc.), the G3/8 port, and the M16x1.5 rod thread. The -S suffix means a piston magnet is present for CS1-B/DS1-B switches; the SAI replacement uses current AirTAC switches. When sizing, a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore yields 2513 N. A plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variant. The 630 mm stroke requires external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X630S
- ✓ 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 SI63X630S FAQ
Yes, the SI63X630S is discontinued. The direct replacement is the AirTAC SAI63X630S. It shares the identical ISO 15552 mounting interface, 63 mm bore, 630 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
This double-acting cylinder operates at 0.15-1.0 MPa with a G3/8 port. 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. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X630S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X630S replacement — usually within 7-8 hours.