This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX750, 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 SI63BX750
The AirTAC SI63 Standard Cylinder SI63BX750 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 750mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX750, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke750 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX750
- 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 SI63BX750
The AirTAC SI63BX750 is a discontinued double-acting ISO 15552 profile cylinder featuring a 63 mm bore, 750 mm stroke, and a SUS304 stainless steel piston rod. Delivering 1559 N push force at 0.5 MPa, it is replaced by the SAI63BX750. This direct upgrade shares the exact ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread.
The SAI replacement introduces an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. Without a -S magnet, this SKU cannot accept a sensor.
Airtac SI63 Standard Cylinder SI63BX750 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX750 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX750 |
| Bore size | Ø63 mm |
| Stroke | 750 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 SAI63BX750 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 SAI63BX750 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 SI63BX750
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×750 | 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 SI63BX750 Is Used
Long-Stroke Diversion
Pushes heavy packages across transfer lines using the 750 mm stroke and 1559 N force, with the SUS304 rod resisting humid washdown environments.
Vertical Material Lift
Raises goods up to 79 kg in storage racks, relying on external guides to prevent rod bending during the 750 mm extension.
Stainless Actuation
Drives tooling stages in light chemical handling where the SUS304 rod prevents corrosion, operating at speeds between 30-800 mm/s.
Replacing the Airtac SI63 Standard Cylinder SI63BX750 with the SAI63BX750
To replace the SI63BX750, order the SAI63BX750. Verify your ISO 15552 mounting fixtures, 63 mm bore, 750 mm stroke, G3/8 port, and SUS304 (-B) rod. Since this lacks a -S magnet, it cannot support legacy CS1-B/DS1-B switches. If sensing is required, choose an SAI model with a magnet. Neighbouring bores offer alternatives: a 50 mm bore yields 982 N push at 0.5 MPa, while an 80 mm bore provides 2513 N. Note that a plain cylinder drifts on air loss; the cushions only decelerate. For load holding, use an external pilot check valve or explore the SAIL or BSAI lock variants. Finally, at 750 mm, prevent rod bending by using an external guide to manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX750
- ✓ 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 SI63BX750 FAQ
Yes, the SI63BX750 is discontinued. The direct replacement is the SAI63BX750. It matches the ISO 15552 mounting interface, 63 mm bore, 750 mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
The 63 mm bore features a G3/8 port and M16x1.5 rod thread. It delivers 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 of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX750
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX750 replacement — usually within 7-8 hours.