This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID63X450, 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-SID63X450
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X450 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 450mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID63X450, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke450 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID63X450
- 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-SID63X450
The AirTAC B04-SID63X450 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston, ensuring push and pull force are equal at 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the base SID63X450, mechanically identical to the standard model with a 63mm bore, 450mm stroke, and G3/8 air port. This SKU has no -S magnet and cannot accept a sensor.
This discontinued model is fully replaced by the direct replacement SAID63X450, which shares the exact ISO 15552 mounting interface, bore, stroke, and equal-both-ways force. The SAI upgrade uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. A plain cylinder does not hold loads on air loss; the cushion only decelerates, so use an external rod lock for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X450 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X450 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID63X450 |
| Bore size | Ø63 mm |
| Stroke | 450 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-SAID63X450 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-SAID63X450 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-SID63X450
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×450 | 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-SID63X450 Is Used
Excavator Linkage Actuation
Drives synchronized dual-tool mechanisms on heavy equipment, using the equal both-ways force to push and pull linkage components with consistent torque.
Crusher Jam Clearance
Applies equal push and pull force to clear blockages in construction material processing, relying on the rigid double-rod output to prevent mechanical binding.
Loader Attachment Sync
Balances parallel attachment arms on loaders, using the through-rod geometry to maintain alignment and resist rotational twist during heavy dirt loading.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X450 with the B04-SAID63X450
To replace the discontinued B04-SID63X450, install the direct replacement SAID63X450, reusing the exact FA, LB, or TC ISO 15552 mounts without modification. Size both ways by checking neighbor bores (50mm or 80mm) against your equal push/pull force needs. The double-rod design is right when you need anti-rotation, to drive two tools, or to mount a sensor cam on the back rod. Because this SKU lacks the -S magnet, it cannot take legacy CS1-B/DS1-B sensors. For the 450mm stroke, add external guides to prevent rod bending and side-load damage. Remember, the 30mm adjustable air cushions only decelerate near stroke end; they do not lock, so for load-holding use SAIL/BSAI lock variants or an external pilot-operated check valve.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID63X450
- ✓ 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-SID63X450 FAQ
Yes, the B04-SID63X450 is discontinued. The direct replacement is the SAID63X450. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SID63X450. The SAID63X450 shares the exact ISO 15552 interface, 63mm bore, 450mm stroke, G3/8 port, and equal both-ways force, while adding an upgraded piston seal.
Because it is a double-rod cylinder, the force is equal both ways: 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The air port is G3/8.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID63X450
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID63X450 replacement — usually within 7-8 hours.