This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X280TC, 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 SI63X280TC
The AirTAC Airtac SI63 Standard Cylinder SI63X280TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 280mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X280TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke280 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X280TC
- 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 SI63X280TC
The AirTAC SI63X280TC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 280 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. Because this exact SKU lacks the -S magnet suffix, it cannot accept a position switch. The direct replacement is the SAI63X280TC, retaining the identical TC trunnion mount, M16x1.5 rod thread, and output force.
The SAI upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. If your fixture requires load holding on air loss, note that the cushion only decelerates; you must use an external pilot check valve or the SAIL lock variant.
Airtac SI63 Standard Cylinder SI63X280TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X280TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X280TC |
| Bore size | Ø63 mm |
| Stroke | 280 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 SAI63X280TC 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 SAI63X280TC 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 SI63X280TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×280 | 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 SI63X280TC Is Used
Pallet Diversion
Actuates routing gates on packaging lines using the TC trunnion mount to handle the 1559 N push force required to pivot heavy pallets.
Clamp Actuation
Drives mid-stroke clamping of 79 kg vertical workloads in CNC machining cells, benefiting from the 30 mm adjustable cushion at stroke end.
Material Ejection
Pushes completed assemblies out of fixtures at 0.7 MPa (2182 N), relying on the rigid ISO 15552 profile barrel to resist deflection.
Replacing the Airtac SI63 Standard Cylinder SI63X280TC with the SAI63X280TC
To replace the SI63X280TC, order the SAI63X280TC. Verify your ISO 15552 TC trunnion mounting dimensions, 63 mm bore, 280 mm stroke, and G3/8 port. Since this original SKU has no -S magnet, it cannot support legacy CS1-B/DS1-B sensors; if sensing is now required, specify a magnet on the new SAI. At 280 mm stroke, watch for side-load rod-bending—use a guide to prevent premature wear. To size both ways: a 50 mm bore yields 982 N push @0.5 MPa (too small), while an 80 mm bore yields 2513 N. Remember the standard cylinder does not hold load without live air; for braking, explore the BSAI clamp-lock or SAIL air-released lock variants.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X280TC
- ✓ 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 SI63X280TC FAQ
Yes, the SI63X280TC is discontinued. The direct replacement is the SAI63X280TC. It is dimensionally interchangeable per the ISO 15552 mounting interface, maintaining the same 63 mm bore, 280 mm stroke, G3/8 port, and TC trunnion mount.
The 63 mm bore uses a G3/8 port. 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.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X280TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X280TC replacement — usually within 7-8 hours.