This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X315SN, 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 SI63X315SN
The AirTAC Airtac SI63 Standard Cylinder SI63X315SN is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 315mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X315SN, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke315 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X315SN
- 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 SI63X315SN
The AirTAC SI63X315SN is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 315 mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. The direct replacement is the SAI63X315SN, matching the interface, force, and mounting.
The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure. The -N NBR seal handles -20 to +70 C; Viton H extends to 150 C. The -S magnet works with CS1-B/DS1-B switches.
Airtac SI63 Standard Cylinder SI63X315SN Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X315SN |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X315SN |
| Bore size | Ø63 mm |
| Stroke | 315 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 SAI63X315SN 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 SAI63X315SN 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 SI63X315SN
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×315 | 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 SI63X315SN Is Used
Package Diversion
Drives sorting arms on packaging lines, utilizing the 1559 N push force to deflect heavy cartons reliably at speed.
Pallet Lift Gates
Actuates safety gates or lifting stops on pallet conveyors, where the 315 mm stroke provides ample travel clearance.
Clamp Actuation
Secures mid-weight workpieces in machining fixtures, benefiting from the adjustable 30 mm air cushions at both ends.
Replacing the Airtac SI63 Standard Cylinder SI63X315SN with the SAI63X315SN
To replace the SI63X315SN, order the SAI63X315SN direct, verifying the ISO 15552 mounting interface, G3/8 port, M16x1.5 rod thread, and -S magnet. For 315 mm strokes, use external guides to prevent rod bending under side loads. If sizing up or down, note 50 mm offers 982 N push while 80 mm yields 2513 N at 0.5 MPa. A plain cylinder drifts without air; for load holding use an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X315SN
- ✓ 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 SI63X315SN FAQ
Yes, the SI63X315SN is discontinued. The direct replacement is the SAI63X315SN. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 315 mm stroke, output force, G3/8 port, and mounting accessories.
This double-acting cylinder uses a G3/8 port. It generates 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 SAI63X315SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X315SN replacement — usually within 7-8 hours.