This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID63X350S, 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-SID63X350S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X350S 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-SAID63X350S, 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-SAID63X350S
- 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-SID63X350S
The AirTAC B04-SID63X350S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as the construction-machinery dedicated variant of the base SID63X350S, mechanically identical in every specification. Because a rod exits both ends on a single piston, both faces use the rod-side area, making push and pull force 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, and the rod-end thread is M16x1.5. This legacy SID series is discontinued and is fully replaced by the direct replacement SAID63X350S, which shares the exact ISO 15552 mounting interface, bore, stroke, and adjustable 30 mm air cushions.
The SAID replacement introduces an upgraded piston seal featuring two Y-shaped one-way elements for low start-up pressure and extended life, alongside new SAIL and BSAI lock variants absent in the SI line. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. Note that air cushions only decelerate near stroke end; a plain cylinder will not hold a load on air loss, requiring an external rod lock or pilot-operated check valve for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X350S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X350S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID63X350S |
| 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-SAID63X350S 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-SAID63X350S 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-SID63X350S
| 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-SID63X350S Is Used
Excavator Actuation
Drives synchronized secondary linkages on heavy equipment where equal push and pull force is required to handle structural counterweights during digging cycles.
Material Transfer Gates
Operates dual-direction routing gates on construction site aggregate conveyors, using the back rod to mount a position cam for feedback.
Loader Attachment Shift
Shifts auxiliary tooling brackets on loaders, relying on the anti-rotation properties of the double-rod design to maintain alignment under harsh jobsite vibration.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X350S with the B04-SAID63X350S
To replace the discontinued B04-SID63X350S, specify the direct replacement SAID63X350S, which preserves the 63 mm bore, 350 mm stroke, G3/8 port, and ISO 15552 mounting interface (Basic, FA, LB, TC, FTC, TCM1, TCM2). When sizing, remember the double-rod design provides equal force both ways (1402 N @0.5 MPa), so if you need higher thrust, step up to the 80 mm bore, or step down to the 50 mm bore for lower force. A double-rod cylinder is the right choice when you need anti-rotation stability, need to drive two tools simultaneously, or require a back rod to carry a sensor cam. The -S magnet supports legacy CS1-B/DS1-B sensors. Because the 350 mm stroke exceeds 300 mm, external guides are recommended to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID63X350S
- ✓ 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-SID63X350S FAQ
Yes, the B04-SID63X350S construction-machinery dedicated cylinder is discontinued. The direct replacement is the SAID63X350S. It shares the identical ISO 15552 interface, 63 mm bore, 350 mm stroke, G3/8 port, and equal both-ways force. The SAI family also adds upgraded piston seals and lock variants.
Force is equal both ways: 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The bore is 63 mm, the air port is G3/8, and the rod thread is M16x1.5. It operates at 0.15-1.0 MPa with an adjustable 30 mm cushion at each end.
Related AirTAC SAI Cylinders
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