This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63AX75, 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 SI63AX75
The AirTAC Airtac SI63 Standard Cylinder SI63AX75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 75mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63AX75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke75 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63AX75
- 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 SI63AX75
The AirTAC SI63AX75 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 75mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI63AX75, matching the bore, stroke, force, port, and ISO 15552 mounting interface.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. This SKU has a SUS420J2 stainless rod (option A) but lacks a magnet, so it cannot take a sensor. For held loads, use SAIL or BSAI lock variants.
Airtac SI63 Standard Cylinder SI63AX75 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63AX75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63AX75 |
| Bore size | Ø63 mm |
| Stroke | 75 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 SAI63AX75 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 SAI63AX75 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 SI63AX75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×75 | 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 SI63AX75 Is Used
Mid-Tonnage Clamping
Secures heavy workpieces in machining fixtures, utilizing the 1559N push force at 0.5MPa with the durable SUS420J2 stainless rod.
Package Diversion
Drives 75mm stroke diverting arms on packaging lines to route heavy goods, benefiting from the 30-800mm/s speed range.
Pallet Lift Stops
Acts as a robust physical stop mechanism in pallet handling systems, safely arresting loads with its 30mm adjustable air cushions.
Replacing the Airtac SI63 Standard Cylinder SI63AX75 with the SAI63AX75
To replace the SI63AX75, order the SAI63AX75. Confirm the ISO 15552 mounting interface, 63mm bore, 75mm stroke, G3/8 port, and your specific mounting accessory. Because this SKU lacks a magnet (-S), it cannot accept position sensors; if sensing is needed, order an SAI63X75S instead. Sizing checks: a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. Note that a plain cylinder drifts on air loss—the cushion only decelerates. For load holding, specify the SAIL or BSAI lock variant, or use an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63AX75
- ✓ 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 SI63AX75 FAQ
Yes, the SI63AX75 is discontinued. The direct replacement is the AirTAC SAI63AX75. It shares the exact same ISO 15552 mounting interface, 63mm bore, 75mm stroke, output force, and G3/8 port, fitting seamlessly into existing fixtures.
The G3/8 port feeds a 63mm bore yielding 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N at 0.9MPa, and a max force of 318kgf at 1.0MPa.
Request a Quote for the SAI63AX75
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63AX75 replacement — usually within 7-8 hours.