This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID63X125S, 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 SID Series Double-Rod Cylinder SID63X125S
The AirTAC Airtac SID Series Double-Rod Cylinder SID63X125S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 125mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID63X125S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID63X125S
- 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 SID Series Double-Rod Cylinder SID63X125S
The AirTAC SID63X125S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston. Both faces use the rod-side area, so push and pull force are equal at 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The bore is 63 mm, the piston rod is Ø20 mm, and the air port is G3/8. This SID model is discontinued; the direct replacement is the SAID63X125S, sharing the same ISO 15552 mounting interface, stroke, and force.
The SAI replacement uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Because of the double-rod design, the back rod can carry a sensor cam, providing anti-rotation stability and allowing you to drive two tools simultaneously. The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches.
Airtac SID Series Double-Rod Cylinder SID63X125S Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID63X125S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID63X125S |
| Bore size | Ø63 mm |
| Stroke | 125 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 SAID63X125S 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 SAID63X125S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SID Series Double-Rod Cylinder SID63X125S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×125 | 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 SID Series Double-Rod Cylinder SID63X125S Is Used
Twin-Tool Machining Station
Drives two opposing tools simultaneously from one piston, utilizing the equal both-ways force to machine parts from both ends accurately.
Anti-Rotation Transfer Gate
The dual-rod geometry prevents mechanical twist during rapid part diversion on a packaging line, ensuring smooth lateral transfers.
Rear-Cam Sensing Press
Uses the extended back rod to carry a dedicated sensor cam, keeping the primary working end clean while maintaining precise end-of-stroke detection.
Replacing the Airtac SID Series Double-Rod Cylinder SID63X125S with the SAID63X125S
To replace the discontinued SID63X125S, specify the SAID63X125S, which is a direct swap retaining the G3/8 port, M16x1.5 rod thread, and 30 mm adjustable cushions. Size both ways by confirming the equal force fits your load; if you need less force, step down to the 50 mm bore (825 N @0.5 MPa), or step up to the 80 mm bore (2268 N @0.5 MPa) for more power. A double rod is right when you need equal push/pull force, anti-rotation resistance, or a rear rod to mount a sensor cam. Mounting options include Basic, FA, LB, and TC brackets. Keep the -S magnet option if you need position sensing. For this 125 mm stroke, side-load is minimal, but for any stroke >=300 mm, ensure guide rails support the load to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID63X125S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SID Series Double-Rod Cylinder SID63X125S FAQ
Yes, the SID63X125S is discontinued. The direct replacement is the SAID63X125S. It shares the same ISO 15552 interface, 63 mm bore, 125 mm stroke, G3/8 port, and equal both-ways force. The SAI family also adds upgraded piston seals and SAIL/BSAI lock variants the SI line lacked.
Force is equal both ways at 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. Speed is 30-800 mm/s. A plain cylinder does not hold loads on air loss; the air cushion only decelerates near stroke end. For held loads, use an external rod lock, pilot-operated check valve, or SAIL/BSAI variant.
Related AirTAC SAI Cylinders
Request a Quote for the SAID63X125S
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