This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID63X300S, 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-SID63X300S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X300S 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-SAID63X300S, 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-SAID63X300S
- 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-SID63X300S
The AirTAC B04-SID63X300S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as the construction-machinery dedicated variant of the base SID63X300S. Because a rod exits both ends on a single piston, the effective area is identical in both directions, yielding equal push and pull force (1402 N @0.5 MPa). The 63 mm bore features a G3/8 port, a 20 mm rod with M16x1.5 thread, and 30 mm adjustable cushions at each end. This SID model is discontinued; the direct replacement is the SAID63X300S, which shares the same ISO 15552 mounting interface, bore, stroke, and porting.
The SAI upgrade introduces a two-piece Y-shaped piston seal for lower start-up pressure and longer life. For motion feedback, the -S suffix provides a piston magnet for legacy CS1-B/DS1-B switches (the SAI replacement uses current AirTAC switches). A plain cylinder does not hold loads on air loss; cushions only decelerate near stroke end, so use an external rod lock or the SAIL/BSAI variant for held loads. With a 300 mm stroke, external guides are recommended to manage side-load and rod bending.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X300S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X300S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID63X300S |
| 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-SAID63X300S 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-SAID63X300S 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-SID63X300S
| 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-SID63X300S Is Used
Excavator Linkage Actuation
Drives secondary construction-machinery linkages where equal push/pull force is required on both extend and retract strokes for balanced implement control.
Heavy Equipment Transfer
Moves components along construction- machinery assembly lines using the back rod to carry a sensor cam for precise position feedback.
Anti-Rotation Material Gates
Operates aggregate or material routing gates on heavy-equipment, using the double-rod geometry to prevent rotation and ensure smooth guidance without twisting.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID63X300S with the B04-SAID63X300S
To replace the discontinued B04-SID63X300S, specify the SAID63X300S, which is a direct match for the ISO 15552 mounting interface (Basic, FA, LB, TC, FTC, TCM1, TCM2), bore, stroke, and G3/8 port. Size both directions by the equal-both-ways force: 1402 N @0.5 MPa, 1962 N @0.7 MPa, or 2523 N @0.9 MPa. If you need less force, the neighbouring 50 mm bore provides 825 N @0.5 MPa; for more, the 80 mm bore offers 2268 N @0.5 MPa. A double-rod design is correct when you need anti-rotation, a back rod to carry a sensor cam, or equal drive force for two tools. Retain the -S magnet for switch mounting. Because the stroke is 300 mm, add external guides to prevent rod bending under side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID63X300S
- ✓ 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-SID63X300S FAQ
Yes, the B04-SID63X300S is discontinued. The direct replacement is the SAID63X300S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SID63X300S; mechanically, both are identical. The SAID63X300S shares the same ISO 15552 mounting interface, 63 mm bore, 300 mm stroke, G3/8 port, and equal-both-ways force, but adds an upgraded two-piece Y-shaped 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 63 mm bore uses a G3/8 air port, a 20 mm rod with an M16x1.5 thread, and 30 mm adjustable cushions at each end. Speed range is 30-800 mm/s.
Related AirTAC SAI Cylinders
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