This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID63X400S, 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-SID63X400S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X400S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 400mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID63X400S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID63X400S
- 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-SID63X400S
The AirTAC B04-SID63X400S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the base SID63X400S, mechanically identical with a 63mm bore, 400mm stroke, and G3/8 port. Because a rod exits both ends on one 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. This model is discontinued; the direct replacement is the SAID63X400S, which reuses the same ISO 15552 mounting interface and adds an upgraded two Y-shaped one-way piston seal for low start-up pressure and long life.
The -S suffix denotes a built-in piston magnet for legacy CS1-B/DS1-B switches. Note that a plain cylinder does not hold loads on air loss; the 30mm adjustable air cushions only decelerate near stroke end, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X400S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X400S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID63X400S |
| Bore size | Ø63 mm |
| Stroke | 400 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-SAID63X400S 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-SAID63X400S 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-SID63X400S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×400 | 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-SID63X400S Is Used
Excavator Linkage Actuation
Drives synchronized dual-tool operations on heavy equipment where the B04- construction-machinery prefix ensures fitment, utilizing the equal both-ways force for stable push and pull.
Heavy-Equipment Clamp
Uses the back rod end to carry a sensor cam while the front rod operates a clamping mechanism, leveraging the anti-rotation benefits of the double-rod design.
Synchronized Boom Gates
Employs both rod ends to move opposing links simultaneously in construction machinery, ensuring perfectly matched timing without external mechanical linkages.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X400S with the B04-SAID63X400S
To replace the discontinued B04-SID63X400S, specify the SAID63X400S. It is a direct: identical 63mm bore, 400mm stroke, G3/8 port, M16x1.5 rod thread, and ISO 15552 mounting dimensions (Basic, FA, LB, TC, FTC, TCM1, TCM2). When sizing, verify the equal-both-ways force (1402 N @0.5 MPa) meets your needs, or step to neighbour bores (50mm or 80mm) for lower or higher thrust. A double rod is right when you need anti-rotation stability or must drive two tools simultaneously. The -S magnet allows sensor tracking. Because stroke is 400mm (>=300), ensure external guides support side loads to prevent rod bending.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID63X400S
- ✓ 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-SID63X400S FAQ
Yes, the B04-SID63X400S is discontinued. The direct replacement is the SAID63X400S. The B04- prefix simply marks it as the construction-machinery dedicated variant; mechanically, it is identical to the base SID63X400S. The SAID replacement shares the same ISO 15552 interface, bore, stroke, G3/8 port, and mounting, but adds an upgraded piston seal.
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.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID63X400S
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