This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X175LB, 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 SI63X175LB
The AirTAC Airtac SI63 Standard Cylinder SI63X175LB is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 175mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X175LB, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke175 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X175LB
- 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 SI63X175LB
The AirTAC SI63X175LB is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 175 mm stroke, delivering 1559 N push force at 0.5 MPa. Because this legacy SI unit is end-of-life, you should order the direct replacement: the SAI63X175LB. It shares the identical ISO 15552 mounting interface, G3/8 port, and LB foot mount, dropping straight into existing fixtures.
The SAI upgrade features a modernized piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this specific SKU lacks a magnet (-S), so it cannot accept CS1-B/DS1-B sensors. If heat is an issue, Viton H seals raise the operating range to 0-150 C.
Airtac SI63 Standard Cylinder SI63X175LB Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X175LB |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X175LB |
| Bore size | Ø63 mm |
| Stroke | 175 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 SAI63X175LB 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 SAI63X175LB 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 SI63X175LB
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×175 | 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 SI63X175LB Is Used
Package Diversion
Pushes medium-weight cartons off a main conveyor line using the 1559 N push force at 0.5 MPa with LB foot mounts.
Pallet Stop Gate
Acts as a pneumatic stop for pallets entering a wrapping zone, safely decelerating loads via its 30 mm adjustable air cushions.
Clamp Actuation
Drives a secondary clamping arm on an assembly fixture, providing 1402 N pull force to secure metal workpieces for machining.
Replacing the Airtac SI63 Standard Cylinder SI63X175LB with the SAI63X175LB
To replace the SI63X175LB, order the SAI63X175LB and verify the ISO 15552 LB foot mount, 175 mm stroke, and G3/8 port. This non-magnetic SKU cannot take a sensor; if position detection is needed, select an SAI63X175LBS instead. Sizing both ways: the 63 mm bore yields 1559 N push at 0.5 MPa, while the neighboring 80 mm bore offers 2513 N. A plain cylinder drifts on air loss—the cushion only decelerates—so for load holding use an external pilot check valve or the SAIL/BSAI lock variants. The 20 mm rod and M16x1.5 thread handle the 175 mm stroke safely, but always guide the load to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X175LB
- ✓ 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 SI63X175LB FAQ
Yes, the AirTAC SI63X175LB is discontinued. The direct replacement is the SAI63X175LB. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 175 mm stroke, G3/8 port, and LB foot mounting interface.
The 63 mm bore uses a G3/8 air 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 SAI63X175LB
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X175LB replacement — usually within 7-8 hours.