This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X350
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-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 B04-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 → B04-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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X350
The AirTAC B04-SID63X350 is an ISO 15552 double-acting double-rod cylinder where the B04- prefix marks it as the construction-machinery dedicated variant of the base SID63X350, mechanically identical in every spec. A rod exits both ends on one piston, meaning both faces use the rod-side area and push/pull force is equal at 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. It has a 63mm bore, 350mm stroke, G3/8 port, and M16x1.5 rod thread. This SID model is discontinued; the direct replacement is the SAID63X350, sharing the same interface, force, and mounting.
The SAI replacement upgrades the piston seal with two Y-shaped one-way elements for low start-up pressure and long life. Note this non-magnetic SKU cannot take a sensor switch. A plain cylinder does not hold loads on air loss (the cushion only decelerates), so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X350 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X350 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-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 B04-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 B04-SAID63X350 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X350 Is Used
Excavator Linkage Control
Equal push and pull force from the dual rods provides stable actuation for heavy-equipment linkage mechanisms on construction machinery.
Loader Attachment Shift
The G3/8 port and 1402 N @0.5 MPa equal force drive dual-action attachment shifts on loaders without needing a larger single-rod push cylinder.
Crusher Tool Drive
Drives two tools simultaneously from one piston, using the 350mm stroke to clear debris in demanding aggregate processing machinery.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X350 with the B04-SAID63X350
To replace the discontinued B04-SID63X350, use the direct replacement SAID63X350, which preserves the ISO 15552 mounting interface, G3/8 port, and equal-both-ways force. Because the double-rod design yields identical push and pull thrust, you can size both directions simultaneously using the 1402 N @0.5 MPa figure; if less force is needed, neighboring bores (50mm or 80mm) offer alternative capacities. A double-rod cylinder is the right choice when you need anti-rotation stability, want to drive two tools from one piston, or require a back rod to carry a sensor cam. You can reuse FA, LB, or TC mounts. As this is a non-magnetic SKU (no -S suffix), it cannot accept a sensor switch. For the 350mm stroke, add external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-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 B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X350 FAQ
Yes, the B04-SID63X350 is discontinued. The direct replacement is the SAID63X350. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SID63X350, so all physical specs remain identical. The SAID keeps the same ISO 15552 interface, bore, stroke, G3/8 port, and mounting.
Because it is a double-rod cylinder, 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 SAI replacement also uses an upgraded two Y-shaped one-way piston seal for longer life.
Related AirTAC SAI Cylinders
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