This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X200LB, 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 SI63X200LB
The AirTAC Airtac SI63 Standard Cylinder SI63X200LB 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 SAI63X200LB, 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 → SAI63X200LB
- 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 SI63X200LB
The AirTAC SI63X200LB is a discontinued double-acting ISO 15552 profile cylinder with a 63mm bore and 200mm stroke, delivering 1559N push force at 0.5MPa via a G3/8 port. It is replaced by the SAI63X200LB direct, which matches the LB foot mounting, M16x1.5 rod thread, and output force exactly. This SKU lacks the -S magnet, so it cannot accept CS1-B/DS1-B sensors.
The SAI upgrade introduces a two Y-shaped one-way piston seal for lower start-up pressure and longer life, while adding SAIL, SAIF, and BSAI lock variants absent from the SI line. For high heat, Viton H seals raise the operating ceiling to 150C.
Airtac SI63 Standard Cylinder SI63X200LB Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X200LB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X200LB |
| 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 SAI63X200LB 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 SAI63X200LB 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 SI63X200LB
| 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 SI63X200LB Is Used
Clamp Actuation
Secures heavy welding fixtures with 1559N push force at 0.5MPa, utilizing the LB foot mount for rigid base attachment.
Package Diversion
Drives 200mm stroke diverting arms at up to 800mm/s, moving moderate loads reliably along material handling lines.
Pallet Stopping
Halts inbound pallets using the 1402N pull force, decelerating smoothly via the 30mm adjustable air cushions.
Replacing the Airtac SI63 Standard Cylinder SI63X200LB with the SAI63X200LB
To replace the SI63X200LB, order the SAI63X200LB. Verify the ISO 15552 mounting interface, 63mm bore, 200mm stroke, G3/8 port, and LB foot bracket. Because this SKU lacks a magnet, you cannot mount legacy CS1-B/DS1-B switches; order an SAI variant with sensing if needed. At 0.5MPa it pushes 1559N (pulls 1402N); the adjacent 50mm bore yields 982N, and the 80mm yields 2513N. Note that a plain cylinder drifts without live air—the cushion only decelerates. For load holding on air loss, specify the SAIL lock, BSAI clamp-lock, or an external pilot check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X200LB
- ✓ 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 SI63X200LB FAQ
Yes, the SI63X200LB is discontinued. The direct replacement is the SAI63X200LB. It shares the identical ISO 15552 mounting interface, 63mm bore, 200mm stroke, G3/8 port, and LB foot mount, fitting existing fixtures perfectly.
It features a G3/8 port and delivers 1559N push / 1402N pull at 0.5MPa, 2182N push at 0.7MPa, 2805N push at 0.9MPa, and a theoretical maximum of 318kgf at 1.0MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI63X200LB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X200LB replacement — usually within 7-8 hours.