This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID63X50S, 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-SID63X50S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X50S 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-SAID63X50S, 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-SAID63X50S
- 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-SID63X50S
The AirTAC B04-SID63X50S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as the construction-machinery dedicated variant of the base SID63X50S. Mechanically identical to the standard line, it features a 63mm bore, 50mm stroke, G3/8 port, and M16x1.5 rod thread. 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 and the direct replacement is the SAID63X50S.
The SAID upgrade retains the exact ISO 15552 mounting interface, bore, stroke, and force, but introduces an upgraded piston seal using two Y-shaped one-way elements for low start-up pressure and long life. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. Note that air cushions only decelerate near stroke end; an external rod lock or pilot-operated check valve is required for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X50S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X50S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID63X50S |
| 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-SAID63X50S 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-SAID63X50S 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-SID63X50S
| 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-SID63X50S Is Used
Excavator Linkage Actuation
Drives secondary construction-machinery mechanisms where equal push and pull force is needed to move covers or linkage arms without rotational drift.
Crusher Feed Gate
Operates a heavy-equipment material feed gate using both rod ends: one drives the gate, the back rod mounts a cam for position sensing.
Loader Attachment Lock
Engages and releases quick-attach buckets on construction loaders, relying on the double-rod's inherent anti-rotation properties for reliable coupling.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X50S with the B04-SAID63X50S
To replace the discontinued B04-SID63X50S, specify the SAID63X50S. It is a direct upgrade: matching 63mm bore, 50mm stroke, G3/8 port, and ISO 15552 mounting dimensions (Basic, FA, LB, TC, FTC, TCM1, TCM2). When sizing both ways, verify the equal push/pull force of 1402 N @0.5 MPa meets your load, or step to neighbouring bores (50mm or 80mm) if more or less force is needed. Choose a double-rod cylinder when you need anti-rotation stability, dual-tool driving from one piston, or need the back rod to carry a sensor cam. The -S magnet supports legacy CS1-B/DS1-B sensors. For this 50mm stroke, side-load bending stress is minimal, but for any stroke >=300mm, ensure guide alignment to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID63X50S
- ✓ 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-SID63X50S FAQ
Yes, the B04-SID63X50S (construction-machinery dedicated variant of SID63X50S) is discontinued. The direct replacement is the SAID63X50S. It shares the identical ISO 15552 interface, 63mm bore, 50mm stroke, G3/8 port, and force, but adds an upgraded piston seal. The B04- prefix only denotes the construction-machinery application and changes no physical specs.
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. It operates at 0.15-1.0 MPa with a 30mm adjustable cushion at each end and speeds of 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID63X50S
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