This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X1350STC, 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 SI63X1350STC
The AirTAC Airtac SI63 Standard Cylinder SI63X1350STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 1350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X1350STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke1350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X1350STC
- 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 SI63X1350STC
The AirTAC SI63X1350STC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 1350 mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI63X1350STC, which matches the bore, stroke, force, port, and TC trunnion mount exactly.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. The SAI family adds SAIL, SAIF, and BSAI variants the SI lacked. This -S SKU uses CS1-B/DS1-B sensors; no-S SKUs take none.
Airtac SI63 Standard Cylinder SI63X1350STC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X1350STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X1350STC |
| Bore size | Ø63 mm |
| Stroke | 1350 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 SAI63X1350STC 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 SAI63X1350STC 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 SI63X1350STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×1350 | 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 SI63X1350STC Is Used
Long-Stroke Material Push
Uses the full 1350 mm travel to transfer large pallets between parallel conveyor lines without requiring intermediate repositioning.
High-Bay Elevator Gate
Actuates tall vertical access doors on storage lifts, relying on the 1559 N push force to move heavy sliding panels.
Automated Assembly Transfer
Shifts heavy machining fixtures along the production line, utilizing the TC trunnion mount to handle pivoting moments.
Replacing the Airtac SI63 Standard Cylinder SI63X1350STC with the SAI63X1350STC
To replace the SI63X1350STC, order the SAI63X1350STC. Confirm the ISO 15552 TC trunnion mount, G3/8 port, M16x1.5 rod thread, and the -S magnet for CS1-B/DS1-B switches. The 63 mm bore gives 1559 N push at 0.5 MPa; sizing down, a 50 mm bore yields 982 N, while sizing up, an 80 mm bore yields 2513 N. A plain cylinder drifts without live air; for load holding use an external pilot check valve or the SAIL/BSAI lock variant. At 1350 mm, prevent rod bending by using an external guide to absorb side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X1350STC
- ✓ 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 SI63X1350STC FAQ
Yes, the SI63X1350STC is discontinued. The direct replacement is the SAI63X1350STC. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 1350 mm stroke, TC mount, and G3/8 port.
This double-acting cylinder uses a G3/8 port. The thrust 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, and a theoretical max of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X1350STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X1350STC replacement — usually within 7-8 hours.