This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X45H, 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 SI63X45H
The AirTAC Airtac SI63 Standard Cylinder SI63X45H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 45mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X45H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke45 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X45H
- 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 SI63X45H
The AirTAC SI63X45H is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 45mm stroke. Built for high-temperature duty, it uses a Viton H seal (0-150 C) and delivers 1559 N push force at 0.5 MPa. AirTAC replaced this legacy unit with the SAI63X45H, a direct sharing the same G3/8 port, M16x1.5 rod thread, and ISO 15552 mounting interface.
The SAI upgrade features two Y-shaped one-way piston seals for low start-up pressure and long life. Without a -S magnet, this SKU cannot take a sensor. Note that a plain cylinder drifts on air loss; for held loads, use an external rod lock or the SAIL/BSAI lock variants.
Airtac SI63 Standard Cylinder SI63X45H Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X45H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X45H |
| Bore size | Ø63 mm |
| Stroke | 45 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 SAI63X45H 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 SAI63X45H 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 SI63X45H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×45 | 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 SI63X45H Is Used
Hot End Ejection
Executes part ejection in elevated-temperature zones, utilizing the Viton H seal to withstand 150 C ambient heat while providing 1559 N of push force.
Diverting Gates
Drives short-stroke diverter flaps in material handling lines, completing the 45mm travel quickly within the 30-800 mm/s speed range.
Replacing the Airtac SI63 Standard Cylinder SI63X45H with the SAI63X45H
To replace the SI63X45H, order the SAI63X45H. Confirm the ISO 15552 mounting interface, 63mm bore, 45mm stroke, G3/8 port (PT/G/NPT thread options), and your specific mounting accessory. Because this SKU lacks a -S magnet, it cannot accept a CS1-B/DS1-B sensor; if position detection is required, switch to a magnet-equipped SAI63X45S. The Viton H seal provides 0-150 C operation. For force context, the 63mm bore yields 1559 N push at 0.5 MPa; stepping down to a 50mm bore gives 982 N, while an 80mm bore provides 2513 N. Remember that the air cushion only decelerates the piston near stroke end and does not hold the load—if you need drop prevention, specify the SAIL or BSAI lock variant, or add a pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X45H
- ✓ 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 SI63X45H FAQ
Yes, the AirTAC SI63X45H is discontinued. The direct replacement is the SAI63X45H. It shares the same ISO 15552 mounting interface, 63mm bore, 45mm stroke, output force, and G3/8 port, fitting directly into existing fixtures.
The 63mm bore features a G3/8 port and M16x1.5 rod thread. Force output 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 maximum of 318 kgf at 1.0 MPa.
Request a Quote for the SAI63X45H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X45H replacement — usually within 7-8 hours.