This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAID63X400, 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 SID63X400
The AirTAC Airtac SID Series Double-Rod Cylinder SID63X400 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAID63X400, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAID63X400
- 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 SID63X400
The AirTAC SID63X400 is a discontinued double-acting double-rod ISO 15552 cylinder where a rod exits both ends on one piston. Both faces use the rod-side area, meaning 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 port is G3/8, the rod is Ø20 mm with an M16x1.5 thread, and it has 30 mm adjustable cushions at each end. This SKU has no -S magnet and cannot take a magnetic switch.
The direct replacement is the SAID63X400, sharing the same ISO 15552 mounting interface, bore, stroke, and G3/8 port. The SAI family uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note that air cushions only decelerate near stroke end; for held loads use an external rod lock or pilot-operated check valve.
Airtac SID Series Double-Rod Cylinder SID63X400 Technical Specifications
| Model | Airtac SID Series Double-Rod Cylinder SID63X400 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAID63X400 |
| Bore size | Ø63 mm |
| Stroke | 400 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 SAID63X400 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 SAID63X400 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 SID63X400
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×400 | 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 SID63X400 Is Used
Equal-Force Transfer
Drives a conveyor pop-up diverter where the 1962 N @0.7 MPa equal both ways force ensures consistent indexing in both extend and retract directions.
Dual-Tool Machining
Mounts a cutting tool on one end and a sensor cam on the opposing rod, utilizing the 63 mm bore and 400 mm stroke for symmetrical part processing.
Replacing the Airtac SID Series Double-Rod Cylinder SID63X400 with the SAID63X400
To replace the discontinued SID63X400, install the direct replacement SAID63X400, reusing the existing ISO 15552 FA, LB, or TC mounts without machining. Size both ways by confirming the 1962 N @0.7 MPa equal force is sufficient, or step to the 80 mm bore (2268 N @0.5 MPa) if more force is needed. A double rod is right when you need equal push/pull force, anti-rotation stability, or a back rod to carry a sensor cam. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors. For the 400 mm stroke, add external guides to prevent rod bending under side loads. Remember a plain cylinder drifts on air loss; use SAIL/BSAI lock variants for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → SAID63X400
- ✓ 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 SID63X400 FAQ
Yes, the SID63X400 is discontinued. The direct replacement is the SAID63X400, which shares the same ISO 15552 interface, 63 mm bore, 400 mm stroke, G3/8 port, and equal both ways force.
The G3/8 port feeds a 63 mm bore with a Ø20 mm rod. Because it is double-rod, force is equal both ways: 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAID63X400
Send us the quantity and destination. We confirm price, stock and lead time on the SAID63X400 replacement — usually within 7-8 hours.