This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX170, 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 SI63AX170
The AirTAC Airtac SI63 Standard Cylinder SI63AX170 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 SAI63AX170, 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 → SAI63AX170
- 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 SI63AX170
The AirTAC SI63AX170 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 through a G3/8 port. The direct replacement is the SAI63AX170, which shares the exact ISO 15552 mounting interface, M16x1.5 rod thread and 30 mm cushions.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. Note this specific SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors. The -A rod is SUS420J2 stainless steel.
Airtac SI63 Standard Cylinder SI63AX170 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX170 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX170 |
| 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 SAI63AX170 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 SAI63AX170 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 SI63AX170
| 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 SI63AX170 Is Used
Clamping Fixtures
Generates 1559 N of clamping force at 0.5 MPa to secure medium-sized aluminum or steel castings during CNC milling operations.
Package Diverters
Drives diverter arms on packaging lines with a 170 mm stroke, moving cartons efficiently at cycle speeds up to 800 mm/s.
Replacing the Airtac SI63 Standard Cylinder SI63AX170 with the SAI63AX170
To replace the SI63AX170, order the SAI63AX170. Verify the ISO 15552 mounting accessory (LB, FA, TC, etc.), the G3/8 port thread (PT/G/NPT) and the SUS420J2 stainless rod (-A). Because this SKU has no -S magnet, it cannot support position sensing; if switches are needed, specify a magnet on the SAI order. At 0.5 MPa the 63 mm bore yields 1559 N push; if undersized, the neighbouring 80 mm bore provides 2513 N. A plain cylinder drifts on air loss—the cushion only decelerates—so use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant for held loads. At 170 mm stroke, side-load risks are low, but ensure rigid guidance for heavy masses.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX170
- ✓ 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 SI63AX170 FAQ
Yes, the SI63AX170 is discontinued. The direct replacement is the SAI63AX170. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 170 mm stroke, output force, G3/8 port and mounting interface.
The 63 mm bore uses a G3/8 port. It produces 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 force of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX170
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX170 replacement — usually within 7-8 hours.