This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X175SCA, 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 SI63X175SCA
The AirTAC Airtac SI63 Standard Cylinder SI63X175SCA is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 175mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X175SCA, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke175 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X175SCA
- 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 SI63X175SCA
The AirTAC SI63X175SCA is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 175mm stroke. It delivers 1559N push and 1402N pull at 0.5MPa through a G3/8 port. AirTAC replaced this legacy unit with the SAI63X175SCA, a direct replacement sharing the exact CA clevis mounting, M16x1.5 rod thread, and output force.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. Your -S code means a piston magnet for CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X175SCA Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X175SCA |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X175SCA |
| Bore size | Ø63 mm |
| Stroke | 175 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 SAI63X175SCA 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 SAI63X175SCA 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 SI63X175SCA
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×175 | 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 SI63X175SCA Is Used
Clamp Actuation
Provides 1559N of clamping force at 0.5MPa for securing heavy machining fixtures during milling or drilling operations.
Package Diversion
Drives a 175mm stroke diverter arm to route medium-weight goods across conveyor lines without requiring external springs.
Pallet Stopping
Acts as a robust pneumatic stop gate for pallets, absorbing kinetic energy using the 30mm adjustable air cushions at both ends.
Replacing the Airtac SI63 Standard Cylinder SI63X175SCA with the SAI63X175SCA
To replace the SI63X175SCA, order the SAI63X175SCA. Verify the ISO 15552 interface, 63mm bore, 175mm stroke, G3/8 port, CA clevis mount, and -S magnet. If downsizing, a 50mm bore yields 982N push at 0.5MPa; if upsizing, an 80mm bore provides 2513N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve. At 175mm stroke, rod bending is low, but always guide the load to prevent side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X175SCA
- ✓ 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 SI63X175SCA FAQ
Yes, the SI63X175SCA is discontinued. The direct replacement is the SAI63X175SCA. It shares the identical ISO 15552 mounting interface, 63mm bore, 175mm stroke, G3/8 port, and CA clevis, fitting existing fixtures perfectly.
This double-acting cylinder uses a G3/8 air port. It generates 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X175SCA
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X175SCA replacement — usually within 7-8 hours.