This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX140, 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 SI63BX140
The AirTAC Airtac SI63 Standard Cylinder SI63BX140 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 140mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX140, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke140 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX140
- 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 SI63BX140
The AirTAC SI63BX140 is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 140mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI63BX140, matching the interface, force, and stroke exactly.
This specific SKU features a SUS304 stainless steel rod for corrosion resistance but lacks a magnet, so it cannot accept position switches. The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure.
Airtac SI63 Standard Cylinder SI63BX140 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX140 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX140 |
| Bore size | Ø63 mm |
| Stroke | 140 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 SAI63BX140 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 SAI63BX140 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 SI63BX140
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×140 | 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 SI63BX140 Is Used
Stainless Rod Clamping
Clamps aluminum parts on machining lines where the SUS304 rod resists coolant spray and moisture.
Mid-Force Diversion
Pushes 140mm to divert packages on conveyors, providing 1559N push at 0.5MPa for heavy cardboard.
Pallet Stop Gate
Acts as a 63mm bore stop gate at palletization stations, handling the kinetic impact of incoming loads.
Replacing the Airtac SI63 Standard Cylinder SI63BX140 with the SAI63BX140
To replace the SI63BX140, order the SAI63BX140. Verify the ISO 15552 mounting interface, 63mm bore, 140mm stroke, G3/8 port, and SUS304 rod option. Sizing checks: a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. This plain cylinder cannot hold load without air; use an external pilot check valve or the SAIL/BSAI lock variant. With no magnet (-S), this SKU cannot take sensors. For 140mm stroke, side-load is minimal, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX140
- ✓ 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 SI63BX140 FAQ
Yes, the SI63BX140 is discontinued. The direct replacement is the SAI63BX140. It is dimensionally interchangeable per ISO 15552, keeping the same 63mm bore, 140mm stroke, G3/8 port, and mounting interface.
It has a G3/8 port. The force ratings are: 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX140
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX140 replacement — usually within 7-8 hours.