This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID63X900, 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-SID63X900
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X900 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 900mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID63X900, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke900 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID63X900
- 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-SID63X900
The B04-SID63X900 is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix marks it as AirTAC's construction-machinery dedicated variant of the base SID63X900. Because a rod exits both ends on one piston, both faces use the rod-side area, yielding equal force both ways (1402 N @0.5 MPa). The bore is 63 mm, the port is G3/8, and the rod thread is M16x1.5. This SID model is discontinued and is replaced by the direct replacement SAID63X900, which reuses the exact ISO 15552 mounting interface.
The SAID replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This SKU lacks the -S magnet and cannot take a magnetic switch. For the 900 mm stroke, external guides are recommended to prevent rod bending under side loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X900 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X900 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID63X900 |
| Bore size | Ø63 mm |
| Stroke | 900 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-SAID63X900 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-SAID63X900 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-SID63X900
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×900 | 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-SID63X900 Is Used
Excavator Linkage Actuation
Drives dual-tool mechanisms on heavy equipment where equal push and pull force is required for balanced linkage movement.
Crusher Feed Sync
Synchronizes material flow on construction site conveyors using the back rod for a cam while the front rod pushes.
Sliding Loader Gate
Actuates heavy sliding gates on loaders, relying on the double-rod geometry to prevent rotation during extension.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X900 with the B04-SAID63X900
To replace the discontinued B04-SID63X900, specify the direct replacement SAID63X900, which matches the 63 mm bore, 900 mm stroke, G3/8 port, and ISO 15552 mounting (Basic, FA, LB, TC). Size both ways by verifying the equal force requirement (1402 N @0.5 MPa) and checking neighbouring bores (50 mm or 80 mm) if margins allow. A double rod is right when you need anti-rotation or must drive two tools. Because this SKU lacks the -S magnet, it cannot use sensors. For the 900 mm stroke, add external guides to manage side-load and rod-bending risks. Note that air cushions only decelerate; use an external rod lock or SAIL/BSAI variant for load holding.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID63X900
- ✓ 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-SID63X900 FAQ
Yes, the B04-SID63X900 (construction-machinery dedicated SID63X900) is discontinued. The direct replacement is the SAID63X900, which shares the same ISO 15552 interface, 63 mm bore, 900 mm stroke, G3/8 port, and mounting.
Force is equal both ways: 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The port is G3/8, the rod thread is M16x1.5, and speed is 30-800 mm/s. The cylinder does not hold loads on air loss; use an external rod lock for held loads.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID63X900
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID63X900 replacement — usually within 7-8 hours.