This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X200S, 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-SID50X200S
The AirTAC B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X200S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 200mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID50X200S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke200 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID50X200S
- 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-SID50X200S
The AirTAC B04-SID50X200S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, making push and pull force equal at 825 N @0.5 MPa. The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the base SID50X200S, mechanically identical to the standard model with a G1/4 port and M16x1.5 rod thread. This SID series is discontinued. The direct replacement is the SAID50X200S, sharing the same ISO 15552 mounting interface, bore, stroke, and equal-both-ways force.
The double-rod design prevents piston rotation and allows the rear rod to carry a sensor cam for CS1-B/DS1-B switches. The SAI replacement upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure. Note that air cushions only decelerate near stroke end; for load holding on air loss, use an external rod lock or SAIL/BSAI variant.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X200S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X200S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X200S |
| Bore size | Ø50 mm |
| Stroke | 200 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-SAID50X200S 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-SAID50X200S 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-SID50X200S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×200 | 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-SID50X200S Is Used
Excavator Linkage Control
Uses the equal both-ways force and anti-rotation properties of the double rod to actuate secondary linkage guides on heavy construction equipment without twisting.
Crusher Feed Gate
Employs the dual rods to push and pull a heavy feed gate on a mobile crushing plant, ensuring identical clamping pressure in both directions.
Loader Attachment Brake
Drives a secondary safety latch on a loader attachment using the rear rod as a sensor cam track, keeping the mechanism compact and synchronized.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X200S with the B04-SAID50X200S
To replace the discontinued B04-SID50X200S, specify the SAID50X200S, which is a direct swap retaining the 50mm bore, 200mm stroke, G1/4 port, and ISO 15552 mounting dimensions. Size both directions by verifying the equal force of 825 N @0.5 MPa meets your needs, or step to neighbouring bores (40mm or 63mm) if a different capacity is required. A double rod is right when you need anti-rotation stability or want to drive two tools from one cylinder. Reuse FA, LB, or TC mounts directly. The -S suffix means a magnet is present for legacy CS1-B/DS1-B sensors. For strokes of 300mm or longer, account for side-load deflection on the rod.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X200S
- ✓ 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-SID50X200S FAQ
Yes, the B04-SID50X200S is discontinued. The direct replacement is the SAID50X200S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SID50X200S, so the SAID50X200S matches its 50mm bore, 200mm stroke, G1/4 port, and ISO 15552 mounting 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. It operates at speeds of 30-800 mm/s. Remember that air cushions only decelerate the piston; they do not hold loads on air loss.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID50X200S
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID50X200S replacement — usually within 7-8 hours.