This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X90TC, 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 SI63X90TC
The AirTAC Airtac SI63 Standard Cylinder SI63X90TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 90mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X90TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke90 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X90TC
- 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 SI63X90TC
The AirTAC SI63X90TC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 90 mm stroke. It delivers 1559 N push and 1402 N pull at 0.5 MPa, utilizing a G3/8 port and M16x1.5 rod thread. Because this legacy unit lacks the -S magnet suffix, it cannot accept a CS1-B or DS1-B sensor. The direct replacement is the SAI63X90TC, sharing the exact TC trunnion mounting, force, and dimensions.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life, while keeping the 30 mm adjustable air cushions. The SAI family also adds SAIL, SAIF, and BSAI variants absent from the SI line.
Airtac SI63 Standard Cylinder SI63X90TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X90TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X90TC |
| Bore size | Ø63 mm |
| Stroke | 90 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 SAI63X90TC 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 SAI63X90TC 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 SI63X90TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×90 | 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 SI63X90TC Is Used
Mid-Tonnage Clamping
Secures heavy workpieces in CNC machining fixtures, utilizing the 1559 N push force at 0.5 MPa to hold parts rigidly against cutting loads.
Pallet Diverting
Actuates routing gates on 63 mm bore conveyor lines, providing positive 90 mm strokes to redirect heavy product flow between packaging lanes.
Replacing the Airtac SI63 Standard Cylinder SI63X90TC with the SAI63X90TC
To replace the SI63X90TC, order the SAI63X90TC. Verify the ISO 15552 TC trunnion mount, 90 mm stroke, G3/8 port, and thread type (PT, G, or NPT). Since this specific SKU has no -S magnet, position sensing is impossible; if switches are needed, select an SAI model with the S suffix to use current AirTAC switches. For sizing, the 63 mm bore gives 1559 N push at 0.5 MPa; if less force is needed, a 50 mm bore provides 982 N, while an 80 mm bore yields 2513 N. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so for load holding consider an external pilot check valve or the SAIL/BSAI lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X90TC
- ✓ 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 SI63X90TC FAQ
Yes, the SI63X90TC is discontinued. The direct replacement is the SAI63X90TC. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 90 mm stroke, G3/8 port, and TC mounting interface.
The 63 mm bore features 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 maximum force of 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X90TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X90TC replacement — usually within 7-8 hours.