This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63BX100STC, 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 SI63BX100STC
The AirTAC Airtac SI63 Standard Cylinder SI63BX100STC is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 100mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63BX100STC, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke100 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63BX100STC
- 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 SI63BX100STC
The AirTAC SI63BX100STC is a discontinued double-acting ISO 15552 profile cylinder featuring a 63mm bore, 100mm stroke, SUS304 stainless steel rod (-B), piston magnet (-S) and TC trunnion mount. It delivers 1559N push and 1402N pull at 0.5MPa via a G3/8 port. AirTAC replaced this legacy unit with the SAI63BX100STC, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force and port size to fit existing fixtures seamlessly.
The SAI replacement introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. If your application requires load holding on air loss, note that a standard cylinder drifts; you should specify the SAIL lock or BSAI clamp-lock variant, or use an external pilot check valve.
Airtac SI63 Standard Cylinder SI63BX100STC Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63BX100STC |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63BX100STC |
| Bore size | Ø63 mm |
| Stroke | 100 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 SAI63BX100STC 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 SAI63BX100STC 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 SI63BX100STC
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×100 | 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 SI63BX100STC Is Used
Stainless Rod Clamping
Ideal for packaging lines requiring washdown resistance, using the SUS304 rod to actuate clamping arms with 1559N force at 0.5 MPa.
TC Mount Diverting
Pivots conveyor diverters via the TC trunnion interface, handling payloads safely up to 935N while managing stroke transitions.
Replacing the Airtac SI63 Standard Cylinder SI63BX100STC with the SAI63BX100STC
To replace the discontinued SI63BX100STC, order the SAI63BX100STC. Verify your TC trunnion mounting hardware, the G3/8 port threads, and the M16x1.5 rod-end connection. The built-in magnet (-S) allows legacy CS1-B/DS1-B sensors to function, though the SAI family uses current AirTAC switches. When sizing both ways, a 50mm bore yields 982N push at 0.5MPa, while an 80mm bore yields 2513N; alternatively, increasing pressure to 0.7MPa provides 2182N of push force. Remember that the air cushion only decelerates the piston near stroke end and does not hold the load—if air is lost, the cylinder drifts, requiring a SAIL lock variant or external rod lock for secure positioning.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63BX100STC
- ✓ 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 SI63BX100STC FAQ
Yes, the SI63BX100STC is discontinued. The direct replacement is the SAI63BX100STC. It shares the identical ISO 15552 mounting interface, 63mm bore, 100mm stroke, G3/8 port, and TC trunnion mount, fitting directly into existing fixtures.
This double-acting cylinder uses a G3/8 port and generates 1559N push / 1402N pull at 0.5 MPa, 2182N push at 0.7 MPa, 2805N push at 0.9 MPa, and a theoretical max of 318 kgf at 1.0 MPa. The piston speed range is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63BX100STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63BX100STC replacement — usually within 7-8 hours.