This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X1000, 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-SID50X1000
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X1000 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 1000mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID50X1000, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke1000 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID50X1000
- 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-SID50X1000
The AirTAC B04-SID50X1000 is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix marks it as the construction-machinery dedicated variant of the base SID50X1000, mechanically identical to it. Because a rod exits both ends on one piston, both faces use the rod-side area, making push and pull force equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. The bore is 50 mm, port is G1/4, rod thread is M16x1.5, and speed is 30-800 mm/s.
This SID model is discontinued and end-of-life; the direct replacement is the SAID50X1000, retaining the same ISO 15552 mounting interface, bore, stroke, and equal-both-ways force. The SAI replacement uses an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and long life. This non-magnetic SKU cannot take a switch, and the 1000 mm stroke requires external guides to prevent rod bending under side loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X1000 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X1000 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X1000 |
| Bore size | Ø50 mm |
| Stroke | 1000 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-SAID50X1000 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-SAID50X1000 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-SID50X1000
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×1000 | 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-SID50X1000 Is Used
Excavator Linkage
Drives dual-tool mechanisms on heavy-equipment linkages where equal push and pull force is required on both extension and retraction strokes.
Loader Boom Sync
Synchronizes opposing movements on construction-machinery booms, using the back rod to carry a cam or drive a secondary mechanism simultaneously.
Crane Fixture Actuation
Actuates clamping fixtures on mobile cranes, benefiting from the anti-rotation properties of the double-rod design during heavy lifts.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X1000 with the B04-SAID50X1000
To replace the discontinued B04-SID50X1000, specify the SAID50X1000, which is a direct upgrade keeping the G1/4 port, M16x1.5 thread, and ISO 15552 dimensions. Size both ways by confirming the 825 N @0.5 MPa equal force fits your load; if more force is needed, step up to the 63 mm bore, or drop to the 40 mm bore if less is required. A double-rod cylinder is right when you need equal push/pull force, anti-rotation stability, or a back rod to drive two tools. Mounting options include Basic, FA, LB, and TC. Because this lacks the -S magnet, it cannot use magnetic switches. For the 1000 mm stroke, external guides are mandatory to manage side-load and rod-bending risks.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X1000
- ✓ 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-SID50X1000 FAQ
Yes, the B04-SID50X1000 is discontinued. The direct replacement is the SAID50X1000. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SID50X1000, and the SAID replacement matches its ISO 15552 interface, bore, stroke, and force exactly.
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 air port is G1/4. Note that a plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end, so use an external rod lock or SAIL/BSAI variant for held loads.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID50X1000
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID50X1000 replacement — usually within 7-8 hours.