This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX65, 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 SI63AX65
The AirTAC Airtac SI63 Standard Cylinder SI63AX65 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 65mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX65, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke65 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX65
- 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 SI63AX65
The AirTAC SI63AX65 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 65mm stroke, delivering 1559N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI63AX65, matching the interface, force and mounting exactly. This SKU features a SUS420J2 stainless rod (A option) but lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and longevity. For load holding, note the air cushion only decelerates; use SAIL or BSAI lock variants.
Airtac SI63 Standard Cylinder SI63AX65 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX65 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX65 |
| Bore size | Ø63 mm |
| Stroke | 65 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 SAI63AX65 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 SAI63AX65 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 SI63AX65
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×65 | 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 SI63AX65 Is Used
Mid-Force Clamping
Ideal for securing heavy steel plates during machining, using the 1559N push force and SUS420J2 stainless rod to resist corrosion in wet coolant environments.
Package Diverting
Provides reliable 65mm actuation to push medium-weight cartons off a main production line onto secondary packaging tracks without overshooting.
Gate Mechanisms
Drives short-stroke access doors on automated cells, where the 1402N pull force at 0.5MPa easily overcomes the friction of heavy industrial guides.
Replacing the Airtac SI63 Standard Cylinder SI63AX65 with the SAI63AX65
To replace the SI63AX65, order the SAI63AX65 ensuring the ISO 15552 mounting interface, 63mm bore, 65mm stroke, G3/8 port and SUS420J2 rod are specified. Because this no-S SKU lacks a magnet, it cannot take sensors; add the S suffix if switch tracking is needed. At 0.5MPa it yields 1559N push and 1402N pull; neighbouring bores (50mm gives 982N, 80mm gives 2513N) offer alternatives if force margins change. The cushion only decelerates; for held loads use an external rod lock, pilot check valve, or the SAIL/BSAI variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX65
- ✓ 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 SI63AX65 FAQ
Yes, the SI63AX65 is discontinued. The direct replacement is the SAI63AX65, which shares the same ISO 15552 mounting interface, 63mm bore, 65mm stroke, output force, G3/8 port and accessories.
It operates at 0.15-1.0MPa with a G3/8 port and M16x1.5 rod thread. Force ratings are 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a maximum theoretical force of 318kgf at 1.0MPa.
Request a Quote for the SAI63AX65
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX65 replacement — usually within 7-8 hours.