This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X700S, 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-SID50X700S
The AirTAC B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X700S 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-SAID50X700S, 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-SAID50X700S
- 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-SID50X700S
The B04-SID50X700S is an AirTAC double-rod ISO 15552 cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the base SID50X700S. Because a rod exits both ends on a single piston, both faces use the rod-side area, making push and pull force equal (825 N at 0.5 MPa). It features a 50 mm bore, G1/4 air port, M16x1.5 rod thread, and a built-in piston magnet (-S) for legacy CS1-B/DS1-B switches. This model is discontinued and end-of-life.
The direct replacement is the SAID50X700S, which shares the same ISO 15552 mounting interface, 700 mm stroke, and physical specs. The SAI family upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. A plain cylinder does not hold loads on air loss; the 30 mm adjustable cushion only decelerates near stroke end, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X700S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X700S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X700S |
| 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-SAID50X700S 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-SAID50X700S 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-SID50X700S
| 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-SID50X700S Is Used
Excavator Linkage Actuation
Drives synchronized dual-tool mechanisms on heavy equipment where the B04- construction prefix ensures dedicated machinery integration.
Material Transfer Pushers
Equal both-ways force allows a pusher to move components on the extend stroke and retract a secondary fixture without force mismatch.
Guided Sensor Cam Tracking
The rear rod exits the back end to carry a sensor cam, providing precise position feedback while the front rod performs the work.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X700S with the B04-SAID50X700S
To replace the discontinued B04-SID50X700S, use the SAID50X700S directly—it matches the 50 mm bore, 700 mm stroke, G1/4 port, and ISO 15552 mounting. Size both ways by checking neighbor bores (40 mm or 63 mm) while confirming the equal both-ways force fits your application. A double rod is right when you need anti-rotation, a back rod to carry a sensor cam, or the ability to drive two tools. You can reuse FA, LB, or TC mounts. The -S magnet supports legacy CS1-B/DS1-B switches. Because stroke is 700 mm (>=300), add external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X700S
- ✓ 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-SID50X700S FAQ
Yes, the B04-SID50X700S is discontinued. The direct replacement is the SAID50X700S. The B04- prefix simply marks it as a construction-machinery dedicated variant; mechanically it is identical to the base SID50X700S. The SAID replacement uses the same ISO 15552 interface, bore, stroke, and G1/4 port.
Force is equal both ways: 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at 0.9 MPa. The bore is 50 mm with a G1/4 air port, M16x1.5 rod thread, and 30 mm adjustable cushion. Speed is 30-800 mm/s. The cylinder does not hold loads without live air; use an external rod lock for held loads.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID50X700S
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