This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X1650H, 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 SI63X1650H
The AirTAC SI63 Standard Cylinder SI63X1650H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 1650mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X1650H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke1650 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X1650H
- 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 SI63X1650H
The AirTAC SI63X1650H is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 1650 mm stroke. Because 1650 mm exceeds the 1500 mm standard maximum for this bore, it is a non-standard, made-to-order unit. It delivers 1559 N push and 1402 N pull at 0.5 MPa through a G3/8 port. The direct replacement is the SAI63X1650H, which shares the same interface, force, and mounting fixtures.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This -H variant uses Viton FKM seals for 0 to 150 C high-temperature environments. Since this SKU lacks a magnet (-S), it cannot take a magnetic switch. Note that air cushions only decelerate; they do not hold load on air loss.
Airtac SI63 Standard Cylinder SI63X1650H Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X1650H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X1650H |
| Bore size | Ø63 mm |
| Stroke | 1650 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 SAI63X1650H 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 SAI63X1650H 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 SI63X1650H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×1650 | 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 SI63X1650H Is Used
High-Tamp Actuation
Drives heavy doors or dampers in 0 to 150 C zones using the Viton FKM seal, where standard NBR cylinders would degrade.
Long-Stroke Transfer
Pushes parts across a 1.65 m span on a production line, requiring external guides to prevent rod bending.
Replacing the Airtac SI63 Standard Cylinder SI63X1650H with the SAI63X1650H
To replace the SI63X1650H, order the SAI63X1650H. Confirm the ISO 15552 mounting interface, 63 mm bore, 1650 mm non-standard stroke, G3/8 port, and your specific mounting accessory (LB, FA, CA, TC). Because this is a high-temperature -H Viton seal variant, verify the 0 to 150 C operating range. As a non-magnet SKU, it cannot accept legacy CS1-B/DS1-B sensors. For sizing, the 63 mm bore gives 1559 N push at 0.5 MPa; if less force is needed, a 50 mm bore offers 982 N, while an 80 mm bore provides 2513 N. A 1650 mm stroke creates high rod-bending risk—always use an external guide to prevent side loads. Finally, a plain cylinder drifts without air; for load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X1650H
- ✓ 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 SI63X1650H FAQ
Yes, the SI63X1650H is discontinued. The direct replacement is the SAI63X1650H. It is dimensionally interchangeable per ISO 15552, matching the 63 mm bore, 1650 mm stroke, G3/8 port, and mounting interface, but adds an upgraded piston seal.
This double-acting cylinder has a G3/8 port and M16x1.5 rod thread. It delivers 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. Speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X1650H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X1650H replacement — usually within 7-8 hours.