This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X75TC, 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 SI63X75TC
The AirTAC Airtac SI63 Standard Cylinder SI63X75TC 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 SAI63X75TC, 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 → SAI63X75TC
- 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 SI63X75TC
The AirTAC SI63X75TC is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 75mm stroke. It delivers 1559N push force at 0.5MPa via a G3/8 port. AirTAC replaced this unit with the SAI63X75TC, a direct sharing the exact TC trunnion mount, M16x1.5 rod thread, and dimensions. The SAI upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life.
Because this SKU lacks the -S magnet, it cannot accept CS1-B/DS1-B sensors. Note that a plain cylinder drifts without live air; for load holding, explore the SAIL lock or BSAI clamp-lock variants the SI line lacked.
Airtac SI63 Standard Cylinder SI63X75TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X75TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X75TC |
| 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 SAI63X75TC 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 SAI63X75TC 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 SI63X75TC
| 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 SI63X75TC Is Used
Package Diverting
Drives TC-mounted routing gates on packaging lines, using the 1559N thrust to push heavy cartons smoothly onto secondary chutes.
Clamp Actuation
Secures steel plates during machining, providing reliable holding via the M16x1.5 rod before the cutter engages the workpiece.
Replacing the Airtac SI63 Standard Cylinder SI63X75TC with the SAI63X75TC
To replace the SI63X75TC, order the SAI63X75TC. Confirm the ISO 15552 TC trunnion interface, 63mm bore, 75mm stroke, G3/8 port (PT/G/NPT thread options), and the non-magnet state. Sizing both ways: a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N. At 0.7MPa, this 63mm unit pushes 2182N. A plain cylinder does not hold load on air loss; the cushion only decelerates. For held loads, use an external pilot check valve or the SAIL/BSAI lock variants. Stroke is under 300mm, so rod-bending side-load risks are minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X75TC
- ✓ 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 SI63X75TC FAQ
Yes, the SI63X75TC is discontinued. The direct replacement is the SAI63X75TC. It is dimensionally interchangeable per ISO 15552, retaining the same 63mm bore, 75mm stroke, G3/8 port, TC trunnion mount, and 1559N force. You simply order the SAI63X75TC.
The 63mm bore features a G3/8 air port and M16x1.5 rod thread. It delivers 1559N push and 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical max of 318 kgf at 1.0MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X75TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X75TC replacement — usually within 7-8 hours.