This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X170S, 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 SI63X170S
The AirTAC Airtac SI63 Standard Cylinder SI63X170S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 170mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X170S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke170 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X170S
- 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 SI63X170S
The AirTAC SI63X170S is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 170 mm stroke. It delivers 1559 N push and 1402 N pull at 0.5 MPa, utilizing a G3/8 port and M16x1.5 rod thread. AirTAC replaced this legacy unit with the SAI63X170S, a direct upgrade sharing the exact ISO 15552 mounting interface, bore, stroke, force, and port size.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. For applications needing load holding on air loss, the SAI family introduces SAIL and BSAI lock variants absent in the SI line. This -S model includes a piston magnet for CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X170S Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X170S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X170S |
| Bore size | Ø63 mm |
| Stroke | 170 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 SAI63X170S 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 SAI63X170S 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 SI63X170S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×170 | 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 SI63X170S Is Used
Clamp and Press Fixtures
Ideal for mid-tier clamping tasks requiring 1559 N of push force at 0.5 MPa to secure steel plates during machining operations.
Package Diverters
Provides robust actuation for diverting heavy pallets or components on a production line using the 170 mm stroke range.
Replacing the Airtac SI63 Standard Cylinder SI63X170S with the SAI63X170S
To replace the SI63X170S, order the SAI63X170S. Verify your ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port, and the -S magnet requirement for CS1-B/DS1-B switches. When sizing, consider the 50 mm bore (982 N push @0.5 MPa) or 80 mm bore (2513 N push @0.5 MPa) alternatives. A plain cylinder drifts on air loss; the cushion only decelerates. For secure load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve. The 170 mm stroke is below the 300 mm threshold, so rod-bending side loads are minimal, but always guide the load to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X170S
- ✓ 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 SI63X170S FAQ
Yes, the SI63X170S is discontinued. The direct replacement is the AirTAC SAI63X170S. It shares the identical ISO 15552 mounting interface, 63 mm bore, 170 mm stroke, G3/8 port, and output force, fitting directly into existing fixtures.
This 63 mm bore double-acting cylinder features a G3/8 air 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 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 SAI63X170S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X170S replacement — usually within 7-8 hours.