This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX175, 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 SI63AX175
The AirTAC Airtac SI63 Standard Cylinder SI63AX175 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 SAI63AX175, 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 → SAI63AX175
- 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 SI63AX175
The AirTAC SI63AX175 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 175 mm stroke. Delivering 1559 N push force at 0.5 MPa via a G3/8 port, it is replaced by the SAI63AX175. This direct successor matches the exact ISO 15552 mounting interface, bore, stroke and output force to fit existing fixtures.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This specific SKU uses a SUS420J2 stainless steel rod (the -A option) but lacks a magnet, meaning it cannot accept CS1-B or DS1-B sensors. For load holding, note that air cushions only decelerate; use an external rod lock or SAIL lock variant.
Airtac SI63 Standard Cylinder SI63AX175 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX175 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX175 |
| 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 SAI63AX175 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 SAI63AX175 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 SI63AX175
| 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 SI63AX175 Is Used
Clamp Actuation
Provides 1559 N of clamping thrust at 0.5 MPa for securing mid-weight steel components during machining operations.
Package Diversion
Drives 175 mm stroke diverting arms on packaging lines, moving products between parallel belts without complex linkages.
Pallet Stops
Acts as a robust pneumatic stop for roller conveyors, halting pallets weighing up to 79 kg in vertical lift scenarios.
Replacing the Airtac SI63 Standard Cylinder SI63AX175 with the SAI63AX175
To replace the SI63AX175, order the SAI63AX175. Verify the ISO 15552 mounting interface, 63 mm bore, 175 mm stroke, M16x1.5 rod thread, and G3/8 port. Because this SKU has no -S magnet, it cannot support position sensing; if switches are needed, select an SAI63X175S and use current AirTAC switches. The -A code specifies a SUS420J2 stainless rod for corrosion resistance versus standard carbon steel. For sizing, the 63 mm bore yields 1559 N push at 0.5 MPa; a neighbouring 50 mm bore provides 982 N, while an 80 mm bore offers 2513 N. A plain cylinder drifts on air loss, so for holding loads consider a pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX175
- ✓ 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 SI63AX175 FAQ
Yes, the SI63AX175 is discontinued. The direct replacement is the AirTAC SAI63AX175. It is dimensionally interchangeable per ISO 15552, matching the 63 mm bore, 175 mm stroke, output force, G3/8 port and mounting interface.
The G3/8 port feeds a cylinder delivering 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa. The speed range is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX175
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX175 replacement — usually within 7-8 hours.