This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X185TC, 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 SI63X185TC
The AirTAC Airtac SI63 Standard Cylinder SI63X185TC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 185mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X185TC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke185 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X185TC
- 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 SI63X185TC
The AirTAC SI63X185TC is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 185 mm stroke. It delivers 1559 N push force at 0.5 MPa via a G3/8 port. Because 185 mm is a non-standard stroke length, it requires custom sizing. The direct replacement is the SAI63X185TC, which shares the exact ISO 15552 mounting interface, M16x1.5 rod thread, and TC trunnion mount.
Upgrading to the SAI retains all dimensions but adds a superior piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. For sensing, note this specific SI SKU lacks the -S magnet, so it cannot accept a CS1-B or DS1-B switch.
Airtac SI63 Standard Cylinder SI63X185TC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X185TC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X185TC |
| Bore size | Ø63 mm |
| Stroke | 185 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 SAI63X185TC 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 SAI63X185TC 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 SI63X185TC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×185 | 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 SI63X185TC Is Used
Package Diverting
Uses the TC trunnion mount to pivot and divert medium-weight packages along a sorting line with 1559 N of push force.
Replacing the Airtac SI63 Standard Cylinder SI63X185TC with the SAI63X185TC
To replace the SI63X185TC, order the SAI63X185TC and confirm the TC trunnion mounting interface, 63 mm bore, 185 mm non-standard stroke, and G3/8 port. Because this is a non-standard stroke, verify the exact extended length against your fixture. When sizing both ways, a 50 mm bore provides 982 N push at 0.5 MPa, while an 80 mm bore yields 2513 N. This plain cylinder cannot hold a load without live air—the 30 mm adjustable air cushions only decelerate near stroke ends. For load holding on air loss, use an external pilot check valve, a rod lock, or the SAIL/BSAI lock variants. The SAI family also offers the SAIF variant with a built-in 4M valve if space is tight.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X185TC
- ✓ 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 SI63X185TC FAQ
Yes, the SI63X185TC is discontinued. The direct replacement is the SAI63X185TC. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 185 mm stroke, G3/8 port, and TC trunnion mount. The SAI features an upgraded two Y-shaped element piston seal for lower start-up pressure.
This 63 mm bore double-acting cylinder uses a G3/8 air port and an M16x1.5 rod thread. The thrust 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. It operates at speeds between 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X185TC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X185TC replacement — usually within 7-8 hours.