This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID63X300, 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-SID63X300
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X300 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 300mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID63X300, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID63X300
- 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-SID63X300
The AirTAC B04-SID63X300 is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as a construction-machinery dedicated variant, mechanically identical to the standard SID63X300. 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 piston rod is Ø20 mm with an M16x1.5 thread, and the air port is G3/8. This legacy model is discontinued and is fully replaced by the direct replacement SAID63X300, which reuses the exact ISO 15552 mounting interface, bore, stroke, and porting.
The SAID upgrade introduces an advanced two Y-shaped one-way piston seal for lower start-up pressure and longer life, while retaining the 30 mm adjustable air cushions at each end and the 30-800 mm/s speed range. This SKU has no -S suffix, meaning it lacks a magnet and cannot accept a magnetic switch. Note that air cushions only decelerate the piston near stroke end; they do not hold loads on air loss, so an external rod lock or pilot-operated check valve is required for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X300 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X300 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID63X300 |
| Bore size | Ø63 mm |
| Stroke | 300 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-SAID63X300 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-SAID63X300 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-SID63X300
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×300 | 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-SID63X300 Is Used
Excavator Linkage Actuation
Drives dual-action pivots on heavy-equipment attachments where equal push and pull force is required for precise boom or arm positioning on construction sites.
Concrete Batch Gate
Operates aggregate flow gates in batching plants, utilizing the double-rod design to provide consistent metering force in both directions under dusty conditions.
Loader Attachment Shift
Synchronizes quick-coupler tool changes on loaders, using the back rod to carry a sensor cam or secondary linkage while maintaining balanced actuation force.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X300 with the B04-SAID63X300
To replace the discontinued B04-SID63X300, specify the direct replacement SAID63X300, which matches the 63 mm bore, 300 mm stroke, G3/8 port, and ISO 15552 mounting footprint without mechanical alterations. Size the replacement by verifying the equal both-ways force (1402 N @0.5 MPa) meets your push and pull requirements, or step to neighbouring bores (50 mm or 80 mm) if the load profile has changed. A double-rod design is the right choice when you need equal force in both directions, anti-rotation stability, or the ability to drive two tools simultaneously from one piston. Reuse existing FA, LB, or TC mounts. Because this SKU lacks the -S magnet, it cannot support legacy CS1-B or DS1-B sensors. Finally, at 300 mm stroke, ensure external guides are used to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID63X300
- ✓ 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-SID63X300 FAQ
Yes, the B04-SID63X300 (construction-machinery dedicated SID63X300) is discontinued. The direct replacement is the SAID63X300. It shares the identical ISO 15552 mounting interface, 63 mm bore, 300 mm stroke, G3/8 port, and equal both-ways force. The SAI family also adds upgraded piston seals and SAIL/BSAI lock variants the SI line lacked.
Because it is a double-rod cylinder, 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, the rod is Ø20 mm with an M16x1.5 thread, and it features 30 mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID63X300
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