This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X75H, 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 SI63X75H
The AirTAC Airtac SI63 Standard Cylinder SI63X75H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 75mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X75H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke75 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X75H
- 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 SI63X75H
The AirTAC SI63X75H is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 75 mm stroke. As a high-temperature variant, it uses Viton H seals rated for 0 to 150 C. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. Because this SKU lacks a magnet (-S), it cannot accept a position sensor.
The factory direct replacement is the SAI63X75H, matching the exact bore, stroke, force, port, and ISO 15552 mounting interface. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
Airtac SI63 Standard Cylinder SI63X75H Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X75H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X75H |
| Bore size | Ø63 mm |
| Stroke | 75 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 SAI63X75H 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 SAI63X75H 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 SI63X75H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×75 | 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 SI63X75H Is Used
Hot Stamp Presses
Clamping workpieces in heated platens where the Viton H seals survive 0-150 C ambient temperatures and the 1559 N force secures the tooling.
High-Temp Diverters
Actuating routing gates near industrial ovens, using the 75 mm stroke to push parts efficiently without overheating standard seals.
Mold Ejection Systems
Ejecting molded components from warm machinery, utilizing the 30-800 mm/s speed range and 1402 N pull force to retract the rod.
Replacing the Airtac SI63 Standard Cylinder SI63X75H with the SAI63X75H
To replace the SI63X75H, order the SAI63X75H and confirm the ISO 15552 mounting interface, 63 mm bore, 75 mm stroke, G3/8 port, and Viton H high-temperature seal. Since this original SKU has no magnet, it cannot support legacy CS1-B/DS1-B sensors; add the -S suffix on the SAI if sensing is required. For sizing alternatives, dropping to a 50 mm bore yields 982 N push at 0.5 MPa, while stepping up to an 80 mm bore provides 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use a pilot check valve or the SAIL/BSAI lock variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X75H
- ✓ 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 SI63X75H FAQ
Yes, the AirTAC SI63X75H is discontinued. The direct replacement is the SAI63X75H. It shares the identical ISO 15552 mounting interface, 63 mm bore, 75 mm stroke, G3/8 port, and output force, fitting directly into existing fixtures.
The 63 mm bore features a G3/8 air port and an M16x1.5 rod thread. Theoretical forces are 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 maximum force of 318 kgf at 1.0 MPa.
Request a Quote for the SAI63X75H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X75H replacement — usually within 7-8 hours.