This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X150SN, 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 SI63X150SN
The AirTAC Airtac SI63 Standard Cylinder SI63X150SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 150mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X150SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke150 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X150SN
- 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 SI63X150SN
The AirTAC SI63X150SN is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 150mm stroke. It delivers 1559N push and 1402N pull at 0.5MPa via a G3/8 port. The direct replacement is the SAI63X150SN, retaining identical ISO 15552 mounting dimensions, force, and stroke.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life. This SI-SKU includes a magnet for CS1-B/DS1-B sensors and an NBR seal (-20 to +70C); Viton H extends this to 150C.
Airtac SI63 Standard Cylinder SI63X150SN Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X150SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X150SN |
| Bore size | Ø63 mm |
| Stroke | 150 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 SAI63X150SN 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 SAI63X150SN 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 SI63X150SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×150 | 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 SI63X150SN Is Used
Clamping Fixtures
Secures heavy metal workpieces during CNC machining using 1559N of clamping force at 0.5MPa.
Package Diverting
Actuates routing gates on high-speed packaging lines, benefiting from the 30-800mm/s speed range.
Pallet Stops
Deploys robust 63mm bore stoppers to halt loaded pallets on roller conveyors safely.
Replacing the Airtac SI63 Standard Cylinder SI63X150SN with the SAI63X150SN
To replace this SI with the SAI63X150SN, verify the 63mm bore, 150mm stroke, G3/8 port, M16x1.5 rod thread, and mounting accessory (LB, FA, CA, TC). The -S magnet enables current AirTAC switches, and the -N denotes the NBR seal. Sizing both ways: a 50mm bore yields 982N push, while an 80mm bore yields 2513N at 0.5MPa. For load holding, note that a plain cylinder drifts on air loss as cushions only decelerate; use an external pilot check valve or the SAIL/BSAI lock variants. At 150mm stroke, rod bending is low, but for any stroke over 300mm add a guide to prevent side-load wear.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X150SN
- ✓ 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 SI63X150SN FAQ
Yes, the SI63X150SN is end-of-life. The direct replacement is the SAI63X150SN. It is dimensionally interchangeable per ISO 15552, matching the 63mm bore, 150mm stroke, G3/8 port, and mounting interface.
It features a G3/8 air port and provides 1559N push / 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 SAI63X150SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X150SN replacement — usually within 7-8 hours.