This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID63X350, 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 SID63X350
The AirTAC Airtac SID Series Double-Rod Cylinder SID63X350 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 350mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID63X350, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID63X350
- 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 SID63X350
The AirTAC SID63X350 is a discontinued double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, ensuring force is equal both ways at 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The direct replacement is the SAID63X350, sharing the same 63mm bore, 350mm stroke, G3/8 port, and mounting interface. The SAI upgrade features a two Y-shaped one-way piston seal for low start-up pressure and long life.
Because this SKU lacks the -S magnet, it cannot take a magnetic switch. Note that air cushions only decelerate the piston near stroke end; they do not hold loads on air loss, so an external rod lock or SAIL/BSAI variant is required for held loads.
For this 350mm stroke, external guides are recommended to mitigate rod-bending and side-load risks.
Airtac SID Series Double-Rod Cylinder SID63X350 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID63X350 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID63X350 |
| Bore size | Ø63 mm |
| Stroke | 350 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 SAID63X350 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 SAID63X350 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 SID63X350
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×350 | 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 SID63X350 Is Used
Synchronized Workholding
Drives two opposing clamps simultaneously with equal both-ways force, ensuring balanced grip on workpieces during machining.
Dual-End Transfer
Pushes a product from one conveyor belt to another using the rear rod, while the front rod retracts to accept the next item.
Anti-Rotation Pressing
Applies 1402 N @0.5 MPa of equal downward and upward force for pressing bearings, resisting rotational drift without external guides.
Replacing the Airtac SID Series Double-Rod Cylinder SID63X350 with the SAID63X350
To replace the discontinued SID63X350, use the direct replacement SAID63X350 which reuses the exact ISO 15552 mounting interface (Basic, FA, LB, TC) without modifications. Size both ways by verifying the equal force requirement: the 63mm bore delivers 1402 N @0.5 MPa, so if lower force is acceptable, the neighbouring 50mm bore provides 825 N, while the 80mm bore offers 2268 N for higher demands. A double rod is right when you need anti-rotation stability or must drive two tools simultaneously from one piston. Because this unit has no -S suffix, it cannot support legacy CS1-B/DS1-B sensors. Finally, at 350mm stroke, ensure external guides are installed to prevent rod-bending under side-loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID63X350
- ✓ 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 SID63X350 FAQ
Yes, the SID63X350 is discontinued. The direct replacement is the SAID63X350, which matches the 63mm bore, 350mm stroke, G3/8 port, and ISO 15552 mounting. The SAI family also adds SAIL and 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. The air port is G3/8, the rod is Ø20mm with an M16x1.5 thread, and speed ranges 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAID63X350
Send us the quantity and destination. We confirm price, stock and lead time on the SAID63X350 replacement — usually within 7-8 hours.