This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID63X50, 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-SID63X50
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 50mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID63X50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke50 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID63X50
- 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-SID63X50
The AirTAC B04-SID63X50 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends on one piston, ensuring force is equal both ways 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 SID63X50, mechanically identical with a 63mm bore, 50mm stroke, G3/8 port, and M16x1.5 rod thread. This SKU lacks the -S magnet and cannot accept a magnetic switch.
This discontinued model drops in directly to the SAID63X50 replacement, reusing the exact ISO 15552 mounting interface (Basic, FA, LB, TC) without changes. The double-rod architecture provides inherent anti-rotation properties and allows the back rod to drive a second tool or sensor cam simultaneously. The SAI upgrade features an improved two Y-shaped one-way piston seal for lower start-up pressure.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X50 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID63X50 |
| Bore size | Ø63 mm |
| Stroke | 50 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-SAID63X50 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-SAID63X50 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-SID63X50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×50 | 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-SID63X50 Is Used
Excavator Linkage Actuation
Uses the equal both-ways force and anti-rotation properties of the double rod to drive synchronized positioning links in heavy-equipment cabins without rotational drift.
Crusher Feed Gate
Employs the back rod to mechanically mirror the primary stroke, operating a secondary dust flap or sensor cam on construction-machinery rock crushers.
Loader Attachment Lock
Provides balanced push and pull clamping for quick-hitch attachment plates on loaders, relying on the 1402 N @0.5 MPa equal force for secure coupling.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X50 with the B04-SAID63X50
To replace the discontinued B04-SID63X50, specify the SAID63X50; it preserves the 63mm bore, 50mm stroke, G3/8 port, and 30mm adjustable cushion while adding the upgraded SAI piston seal. Because force is equal both ways, verify your push and pull loads against the 1402 N @0.5 MPa figure, stepping up to an 80mm bore if higher force is needed. Choose a double-rod cylinder when your mechanism requires anti-rotation stability or needs to drive two tools from one piston. Reuse existing FA, LB, or TC mounts directly via the ISO 15552 interface. Note that without the -S magnet option, this cylinder cannot support position sensing. For strokes of 300mm or longer, carefully manage side-load moments to prevent premature seal wear. Finally, a plain cylinder cannot hold a load on air loss; use an external rod lock or pilot-operated check valve for held loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID63X50
- ✓ 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-SID63X50 FAQ
Yes, the B04-SID63X50 is discontinued. The direct replacement is the SAID63X50. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SID63X50, so the SAID63X50 matches it exactly on ISO 15552 mounting, 63mm bore, 50mm stroke, G3/8 port, and force. The SAI family also adds SAIL and BSAI lock variants the SI line lacked.
As a double-rod cylinder, the force is equal both ways and never quotes a larger single-rod push value. It delivers 1402 N @0.5 MPa, 1962 N @0.7 MPa, and 2523 N @0.9 MPa. The air port is G3/8. The air cushion only decelerates near stroke end and does not hold the load on air loss; for held loads use an external rod lock or pilot-operated check valve.
Related AirTAC SAI Cylinders
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