This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X700, 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-SID50X700
The AirTAC B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X700 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 700mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID50X700, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke700 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID50X700
- 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-SID50X700
The AirTAC B04-SID50X700 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, yielding equal force in both directions (825 N at 0.5 MPa). The B04- prefix marks this as a construction-machinery dedicated variant; mechanically, it is identical to the base SID50X700, featuring a 50 mm bore, G1/4 port, and M16x1.5 rod thread. This SID model is discontinued, and the direct replacement is the SAID50X700, which reuses the same ISO 15552 mounting interface and adds an upgraded piston seal with two Y-shaped one-way elements for lower start-up pressure and longer life.
Because both faces use the rod-side area, push and pull forces are identical, preventing single-rod push asymmetry. The equal-both-ways force enables anti-rotation and driving two tools simultaneously, while the rear rod can carry a sensor cam—though this specific SKU lacks the -S magnet and cannot take a switch. Note that air cushions only decelerate near stroke end; for load holding on air loss, use an external rod lock or pilot-operated check valve.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X700 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X700 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X700 |
| Bore size | Ø50 mm |
| Stroke | 700 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-SAID50X700 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-SAID50X700 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-SID50X700
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×700 | 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-SID50X700 Is Used
Excavator Linkage Control
Equal push/pull force precisely actuates auxiliary construction-machinery linkages without the asymmetry of single-rod push, ensuring stable bidirectional movement.
Heavy-Equipment Material Transfer
Drives dual pusher arms simultaneously from one piston, using the double-rod geometry to synchronize heavy component feeding on assembly lines.
Guided Panel Positioning
The twin-rod anti-rotation特性 keeps heavy machinery panels aligned during 700 mm travel, preventing rod twisting without external guides.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X700 with the B04-SAID50X700
To replace the discontinued B04-SID50X700, use the SAID50X700 direct: it matches the 50 mm bore, 700 mm stroke, G1/4 port, and ISO 15552 mounting. Size both ways by checking neighboring bores (40 mm or 63 mm) if you need different equal-both-ways force, ensuring the push/pull symmetry fits your mechanics. A double rod is right when you need anti-rotation, to drive two tools at once, or to mount a cam on the back rod. Reuse FA, LB, or TC mounts directly. Because this SKU has no -S magnet, it cannot use magnetic switches. Finally, for the 700 mm stroke, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X700
- ✓ 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-SID50X700 FAQ
Yes, the B04-SID50X700 (construction-machinery dedicated SID50X700) is discontinued. The direct replacement is the SAID50X700. It shares the same ISO 15552 interface, 50 mm bore, 700 mm stroke, G1/4 port, and equal-both-ways force, while adding an upgraded piston seal.
Force is equal both ways: 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. Speed is 30-800 mm/s. It features a 20 mm rod, M16x1.5 thread, and 30 mm adjustable air cushions at each end. Air cushions only decelerate; use an external rod lock for load holding.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID50X700
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