This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X200SFB, 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 SI63X200SFB
The AirTAC SI63 Standard Cylinder SI63X200SFB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 200mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X200SFB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke200 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X200SFB
- 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 SI63X200SFB
The AirTAC SI63X200SFB is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 200 mm stroke. It delivers 1559 N push force at 0.5 MPa through a G3/8 port. AirTAC replaced this unit with the SAI63X200SFB, a direct upgrade retaining the exact ISO 15552 mounting interface, M16x1.5 rod thread, and 30 mm cushions. The SAI features an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
The original SI includes a piston magnet for CS1-B/DS1-B switches, while the SAI family adds lock and valve variants like SAIL and BSAI that the SI lacked. You can also specify Viton H seals for high-temperature environments up to 150 C.
Airtac SI63 Standard Cylinder SI63X200SFB Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X200SFB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X200SFB |
| Bore size | Ø63 mm |
| Stroke | 200 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 SAI63X200SFB 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 SAI63X200SFB 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 SI63X200SFB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×200 | 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 SI63X200SFB Is Used
Clamping Fixtures
Secures mid-weight machined parts with 1559 N of force at 0.5 MPa, ensuring rigid holding during milling or drilling operations.
Package Diverting
Actuates routing gates on 63 mm profile cylinders to redirect heavy cartons along secondary packaging lines without stalling.
Pallet Stopping
Deploys a 200 mm stroke stop block to arrest incoming pallets at 0.7 MPa, absorbing kinetic energy via the 30 mm adjustable cushion.
Replacing the Airtac SI63 Standard Cylinder SI63X200SFB with the SAI63X200SFB
To replace the SI63X200SFB, order the SAI63X200SFB. Confirm your ISO 15552 interface, the FB flange mounting, 200 mm stroke, G3/8 port, and the -S magnet for current AirTAC switches. If you need more force, the 80 mm bore yields 2513 N push at 0.5 MPa; if less is required, the 50 mm bore gives 982 N. Remember that a plain cylinder drifts on air loss because the cushion only decelerates the load. For load holding, use an external pilot check valve or choose the SAIL or BSAI lock variant. At 200 mm stroke, side-load and rod-bending stresses are minimal, but always guide the load to prevent binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X200SFB
- ✓ 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 SI63X200SFB FAQ
Yes, the SI63X200SFB is discontinued. The direct replacement is the SAI63X200SFB. It shares the identical ISO 15552 mounting interface, 63 mm bore, 200 mm stroke, FB flange, and G3/8 port, so it drops directly into existing fixtures.
The 63 mm bore uses a G3/8 port. At 0.5 MPa it provides 1559 N push and 1402 N pull force. At 0.7 MPa push is 2182 N, and at 0.9 MPa it is 2805 N. The theoretical maximum force is 318 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X200SFB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X200SFB replacement — usually within 7-8 hours.