This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X175H, 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 SI63X175H
The AirTAC Airtac SI63 Standard Cylinder SI63X175H 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 SAI63X175H, 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 → SAI63X175H
- 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 SI63X175H
The AirTAC SI63X175H is a discontinued double-acting ISO 15552 profile cylinder featuring a 63 mm bore and 175 mm stroke. It delivers 1559 N push and 1402 N pull at 0.5 MPa, utilizing a G3/8 air port and M16x1.5 rod thread. This specific SKU includes a Viton H high-temperature seal (0 to 150 C) but lacks a magnet, meaning it cannot accept position sensors.
You should order the direct replacement SAI63X175H, which maintains the exact ISO 15552 mounting interface, bore, stroke, force, and port size. The SAI features an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
Airtac SI63 Standard Cylinder SI63X175H Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X175H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X175H |
| 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 SAI63X175H 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 SAI63X175H 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 SI63X175H
| 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 SI63X175H Is Used
High-Temp Ejection
Ejecting molded parts from hot environments using the Viton H seal rated for 0-150 C, providing 1559 N of push force at 0.5 MPa.
Transfer Diversion
Actuating diverter arms on production lines where the 175 mm stroke and 1402 N pull force reliably re-route 79 kg vertical loads.
Clamp Actuation
Securing heavy workpieces during machining, utilizing the ISO 15552 mounting interface for rigid fixture integration.
Replacing the Airtac SI63 Standard Cylinder SI63X175H with the SAI63X175H
To replace the discontinued SI63X175H, order the SAI63X175H. Verify your ISO 15552 mounting fixture (LB, FA, TC, etc.), the G3/8 port threads, and the M16x1.5 rod end. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is needed, select an SAI model with an S suffix. For load holding, note that a standard cylinder drifts on air loss—the cushion only decelerates—so use an external pilot check valve or the SAIL/BSAI lock variants. At a 175 mm stroke, side-load is minimal, but always guide the rod to prevent bending. If downsizing, a 50 mm bore gives 982 N push; if upsizing, an 80 mm bore yields 2513 N.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X175H
- ✓ 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 SI63X175H FAQ
Yes, the SI63X175H is discontinued. The direct replacement is the SAI63X175H. It shares the identical ISO 15552 mounting interface, 63 mm bore, 175 mm stroke, G3/8 port, and Viton H high-temp seal, fitting existing fixtures perfectly.
The 63 mm bore uses a G3/8 air port. Force output is 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. It operates at speeds of 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X175H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X175H replacement — usually within 7-8 hours.