This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX210, 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 SI63AX210
The AirTAC Airtac SI63 Standard Cylinder SI63AX210 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 210mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX210, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke210 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX210
- 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 SI63AX210
The AirTAC SI63AX210 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 210 mm stroke. Delivering 1559 N push force at 0.5 MPa via a G3/8 port, it features a SUS420J2 stainless piston rod (-A) for corrosion resistance. This SKU lacks a magnet, so it cannot accept a position sensor.
The direct replacement is the SAI63AX210. It shares the exact ISO 15552 mounting interface, bore, stroke, and force. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure.
Airtac SI63 Standard Cylinder SI63AX210 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX210 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX210 |
| Bore size | Ø63 mm |
| Stroke | 210 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 SAI63AX210 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 SAI63AX210 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 SI63AX210
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×210 | 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 SI63AX210 Is Used
Corrosive Clamping
Uses the SUS420J2 stainless rod to clamp parts in wash-down or mildly corrosive manufacturing cells without rod degradation.
Transfer Diverters
Provides 1559 N push at 0.5 MPa to actuate heavy transfer diverters or gates on high-throughput packaging lines.
Pallet Stops
Halts pallets on roller conveyors using a 210 mm stroke, absorbing kinetic energy via the 30 mm adjustable air cushions.
Replacing the Airtac SI63 Standard Cylinder SI63AX210 with the SAI63AX210
To replace the SI63AX210, order the SAI63AX210. Confirm the ISO 15552 mounting interface, 210 mm stroke, G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). This non-magnet SKU cannot take CS1-B/DS1-B sensors; order an -S suffix if sensing is needed. For sizing, the neighbouring 80 mm bore yields 2513 N push at 0.5 MPa, while the 50 mm bore yields 982 N. A plain cylinder drifts on air loss; for load holding, use an external pilot check valve or the SAIL/BSAI lock variants. At 210 mm stroke, rod bending is minimal, but ensure guide alignment to prevent side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX210
- ✓ 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 SI63AX210 FAQ
Yes, the SI63AX210 is discontinued. The direct replacement is the SAI63AX210. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 210 mm stroke, force, G3/8 port, and mounting interface.
It features a G3/8 port and delivers 1559 N push / 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, and a theoretical max of 318 kgf at 1.0 MPa. Note this non-magnet SKU cannot accept position sensors.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63AX210
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX210 replacement — usually within 7-8 hours.