This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X695, 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 SI63X695
The AirTAC Airtac SI63 Standard Cylinder SI63X695 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 695mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X695, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke695 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X695
- 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 SI63X695
The AirTAC SI63X695 is a discontinued double-acting ISO 15552 profile cylinder featuring a 63 mm bore and 695 mm stroke, delivering 1559 N push force at 0.5 MPa. AirTAC replaced it with the SAI63X695, a direct upgrade retaining the exact ISO 15552 mounting interface, G3/8 port, and output force.
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 SKU lacks a magnet (-S) and cannot accept CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X695 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X695 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X695 |
| Bore size | Ø63 mm |
| Stroke | 695 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 SAI63X695 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 SAI63X695 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 SI63X695
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×695 | 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 SI63X695 Is Used
Long-Stroke Diversion
Pushes packages across a 695 mm transfer gap with 1559 N force, relying on external guides to prevent rod bending.
Fixture Actuation
Drives large machining clamps over extended distances, dropping straight into existing ISO 15552 mounting fixtures.
Replacing the Airtac SI63 Standard Cylinder SI63X695 with the SAI63X695
To replace the SI63X695, order the SAI63X695, confirming the ISO 15552 interface, 63 mm bore, 695 mm stroke, G3/8 port, and mounting accessory. Because this 695 mm stroke exceeds 300 mm, use external guides to prevent rod bending and side-load damage. Sizing both ways: a 50 mm bore gives 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 variants. The SAI family also adds the SAIF self-valve option.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X695
- ✓ 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 SI63X695 FAQ
Yes, the SI63X695 is discontinued. The direct replacement is the SAI63X695. It shares the same ISO 15552 mounting interface, 63 mm bore, 695 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
The 63 mm bore features a G3/8 port and M16x1.5 rod thread. It delivers 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N at 0.9 MPa, and a theoretical max of 318 kgf at 1.0 MPa. Speed is 30-800 mm/s.
Request a Quote for the SAI63X695
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X695 replacement — usually within 7-8 hours.