This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X115, 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 SI63X115
The AirTAC Airtac SI63 Standard Cylinder SI63X115 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 115mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X115, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke115 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X115
- 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 SI63X115
The AirTAC SI63X115 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 115 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. The direct replacement is the SAI63X115, matching the exact interface, output, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. This non-magnet SKU cannot take a sensor; legacy -S types used CS1-B/DS1-B switches.
Airtac SI63 Standard Cylinder SI63X115 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X115 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X115 |
| Bore size | Ø63 mm |
| Stroke | 115 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 SAI63X115 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 SAI63X115 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 SI63X115
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×115 | 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 SI63X115 Is Used
Clamp Actuation
Provides reliable 1559 N clamping force for mid-weight machining fixtures.
Package Diverting
Drives 115 mm stroke diverting arms to route goods along processing lines.
Pallet Stopping
Acts as a robust stopper for medium pallets on roller conveyor sections.
Replacing the Airtac SI63 Standard Cylinder SI63X115 with the SAI63X115
To replace the SI63X115, order the SAI63X115. Confirm the ISO 15552 mounting interface, 63 mm bore, 115 mm stroke, G3/8 port (PT/G/NPT thread), and accessory type (LB, FA, TC, etc.). This non-S SKU lacks a magnet and cannot accept a sensor. For sizing, a 50 mm bore gives 982 N [email protected], while an 80 mm bore yields 2513 N. Note that a plain cylinder drifts on air loss; the cushion only decelerates. For held loads, use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X115
- ✓ 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 SI63X115 FAQ
Yes, the SI63X115 is discontinued. The direct replacement is the SAI63X115. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 115 mm stroke, output force, G3/8 port, and mounting fixtures.
It features a G3/8 air port and M16x1.5 rod thread. Force output is 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, with a theoretical maximum of 318 kgf at 1.0 MPa.
Request a Quote for the SAI63X115
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X115 replacement — usually within 7-8 hours.