This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X600, 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-SID50X600
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X600 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 600mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID50X600, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke600 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID50X600
- 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-SID50X600
The AirTAC B04-SID50X600 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 SID50X600. A piston rod exits both ends, meaning push and pull force is equal both ways at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. It features a 50 mm bore, G1/4 air port, M16x1.5 rod thread, and 30 mm adjustable cushions at each end. This SID model is discontinued and the direct replacement is the SAID50X600, which retains the same interface, force, and mounting.
The double-rod design prevents rod rotation and allows the back rod to drive a second tool or sensor cam. The SAI replacement upgrades the piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life. Note this non-magnetic SKU cannot take a sensor switch, and air cushions only decelerate; use an external rod lock or SAIL/BSAI variant for load holding.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X600 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X600 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X600 |
| Bore size | Ø50 mm |
| Stroke | 600 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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 1200 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAID50X600 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The B04-SAID50X600 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-SID50X600
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×600 | 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-SID50X600 Is Used
Excavator Panel Pusher
Equal both ways force drives and retracts a heavy cab panel stamping on earthmoving equipment without the rotational drift common to single-rod units.
Loader Boom Aligner
The double-rod design provides anti-rotation stability for aligning heavy machinery booms, while the back rod simultaneously pilots a secondary hydraulic valve.
Crane Counterweight Shift
Uses the 600 mm stroke to shift counterweights on mobile cranes, relying on external guides to manage side-load given the extended stroke length.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X600 with the B04-SAID50X600
To replace the discontinued B04-SID50X600, specify the SAID50X600 direct: it matches the 50 mm bore, 600 mm stroke, G1/4 port, and ISO 15552 mounting footprint (Basic, FA, LB, TC) exactly. Size both ways by checking neighbor bores (40 mm or 63 mm) if you need to adjust the equal both ways force, remembering the 50 mm yields 825 N @0.5 MPa. Choose a double-rod cylinder when you need anti-rotation stability or dual-end actuation. Because this SKU lacks the -S magnet, it cannot support sensing; add an -S suffix if you need CS1-B/DS1-B switch accuracy. For the 600 mm stroke, use external guides to prevent rod bending and side-load damage. Never rely on the air cushion for load holding on air loss; use a pilot-operated check valve or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X600
- ✓ 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-SID50X600 FAQ
Yes, the B04-SID50X600 construction-machinery dedicated cylinder is discontinued. The direct replacement is the SAID50X600, which shares the identical ISO 15552 interface, 50 mm bore, 600 mm stroke, G1/4 port, and equal both ways force. The B04- prefix only marks the construction application and changes no physical specs.
Because it is a double-rod cylinder, force is equal both ways: 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. The bore is 50 mm with a G1/4 air port, M16x1.5 rod thread, and 30 mm adjustable cushions.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID50X600
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