This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X40H, 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 SI63X40H
The AirTAC SI63 Standard Cylinder SI63X40H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 40mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X40H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke40 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X40H
- 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 SI63X40H
The AirTAC SI63X40H is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 40mm stroke. As a high-temperature variant, it uses Viton H seals for 0 to 150 C operation. Generating 1559 N push force at 0.5 MPa, its direct replacement is the SAI63X40H, which shares the exact ISO 15552 mounting interface, G3/8 port, and M16x1.5 rod thread.
Because this SKU lacks the -S magnet, it cannot accept a position sensor. The SAI upgrade features a two-piece Y-shaped piston seal for low start-up pressure and longevity.
Airtac SI63 Standard Cylinder SI63X40H Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X40H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X40H |
| Bore size | Ø63 mm |
| Stroke | 40 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 SAI63X40H 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 SAI63X40H 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 SI63X40H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×40 | 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 SI63X40H Is Used
Hot Stamp Ejection
Uses the 1559 N push force at 0.5 MPa to eject parts from heated molds, relying on the Viton H seals to withstand 150 C ambient temperatures without degrading.
High-Temp Clamping
Secures workpieces near ovens or thermal processes; the 40mm stroke provides rapid actuation while the ISO 15552 profile barrel resists side loads in rigid fixtures.
Replacing the Airtac SI63 Standard Cylinder SI63X40H with the SAI63X40H
To replace the SI63X40H, order the SAI63X40H, matching the 63mm bore, 40mm stroke, G3/8 port, and ISO 15552 mounting. This cylinder lacks a magnet, so it cannot use CS1-B or DS1-B sensors; order an -S version if sensing is required. For sizing down, a 50mm bore yields 982 N push at 0.5 MPa; sizing up to 80mm provides 2513 N. Note that a standard cylinder drifts without live air—the cushion only decelerates. For load holding, use an external pilot check valve or the SAIL/BSAI lock variants. The SAIF variant integrates a 4M valve for bores 32-100.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X40H
- ✓ 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 SI63X40H FAQ
Yes, the SI63X40H is discontinued. The direct replacement is the SAI63X40H. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 40mm stroke, output force, G3/8 port, and mounting interface.
It features a G3/8 air port. The 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 SAI63X40H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X40H replacement — usually within 7-8 hours.