This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X75, 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 SI63X75
The AirTAC Airtac SI63 Standard Cylinder SI63X75 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 75mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X75, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke75 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X75
- 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 SI63X75
The AirTAC SI63X75 is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 75 mm stroke, delivering 1559 N push force at 0.5 MPa. It features a Ø20 mm rod, M16x1.5 thread, 30 mm adjustable cushions, and a G3/8 port. The direct replacement is the SAI63X75, matching the exact interface, force, and mounting.
This SKU lacks the -S magnet and cannot accept a sensor. The SAI upgrade uses two Y-shaped piston seals for low start-up pressure. For load holding, use the SAIL lock or BSAI clamp-lock variants, as cushions only decelerate.
Airtac SI63 Standard Cylinder SI63X75 Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X75 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X75 |
| Bore size | Ø63 mm |
| Stroke | 75 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 SAI63X75 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 SAI63X75 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 SI63X75
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×75 | 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 SI63X75 Is Used
Mid-Tonnage Clamping
Secures heavy workpieces during CNC machining with 1559 N of push force at 0.5 MPa.
Package Diverting
Actuates routing gates on high-speed packaging lines, operating at 30-800 mm/s.
Pallet Stops
Controls heavy pallet flow on accumulation conveyors using the 63 mm bore profile.
Replacing the Airtac SI63 Standard Cylinder SI63X75 with the SAI63X75
To replace the SI63X75, order the SAI63X75 direct, confirming the ISO 15552 mounting interface, 63 mm bore, 75 mm stroke, G3/8 port (PT/G/NPT), and mounting accessory. This non-magnet SKU cannot take a CS1-B/DS1-B switch. For sizing, a 50 mm bore yields 982 N [email protected], while an 80 mm bore yields 2513 N. Note that a plain cylinder drifts on air loss; cushions only decelerate. For held loads, use an external pilot check valve or the SAIL/BSAI lock variants. The SAIF variant integrates a 4M valve.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X75
- ✓ 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 SI63X75 FAQ
Yes, the AirTAC SI63X75 is discontinued. The direct replacement is the SAI63X75, which matches the ISO 15552 mounting interface, 63 mm bore, 75 mm stroke, force, and G3/8 port size.
The 63 mm bore uses a G3/8 port. It delivers 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 max of 318 kgf at 1.0 MPa.
Request a Quote for the SAI63X75
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X75 replacement — usually within 7-8 hours.