This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X950STC, 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 SI63X950STC
The AirTAC Airtac SI63 Standard Cylinder SI63X950STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 950mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X950STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke950 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X950STC
- 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 SI63X950STC
The AirTAC SI63X950STC is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 950mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. The direct replacement is the SAI63X950STC, matching the interface, stroke and force.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. The SAI family adds SAIL lock and BSAI clamp variants the SI lacked.
Airtac SI63 Standard Cylinder SI63X950STC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X950STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X950STC |
| Bore size | Ø63 mm |
| Stroke | 950 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 SAI63X950STC 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 SAI63X950STC 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 SI63X950STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×950 | 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 SI63X950STC Is Used
Long-Stroke Diversion
Pushes heavy pallets laterally across packaging lines using the full 950mm travel with reliable 1559N force at 0.5MPa.
Vertical Material Lift
Raises goods up to 79kg in automated storage racks, benefiting from the ISO 15552 TC trunnion mount for pivoting alignment.
Press Ejection
Cycles long stamping rejects out of machinery beds, relying on the 30mm adjustable air cushions to decelerate the rod smoothly.
Replacing the Airtac SI63 Standard Cylinder SI63X950STC with the SAI63X950STC
To replace the SI63X950STC, order the SAI63X950STC. Confirm the ISO 15552 TC trunnion mount, 950mm stroke, G3/8 port and -S magnet for CS1-B/DS1-B switches. Neighbouring bores: 50mm gives 982N push, 80mm gives 2513N at 0.5MPa. For this 950mm stroke, use external guides to prevent rod bending and side-load wear. The cushion only decelerates; for load holding on air loss, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X950STC
- ✓ 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 SI63X950STC FAQ
Yes, the SI63X950STC is discontinued. The direct replacement is the SAI63X950STC. It is dimensionally interchangeable per ISO 15552, matching the 63mm bore, 950mm stroke, G3/8 port and TC mounting.
This double-acting cylinder uses a G3/8 port. It provides 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N at 0.9MPa, and a theoretical max of 318kgf at 1.0MPa. Speed is 30-800mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X950STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X950STC replacement — usually within 7-8 hours.