This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X200, 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-SID50X200
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X200 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-SAID50X200, 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-SAID50X200
- 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-SID50X200
The AirTAC B04-SID50X200 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 the construction-machinery dedicated variant of the SID50X200, mechanically identical to the base model with a 50mm bore, 200mm stroke, and G1/4 port. This legacy series is discontinued, replaced by the SAID50X200 direct upgrade.
The SAID replacement reuses the exact ISO 15552 mounting interface and adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure. Because the second rod acts as an anti-rotation guide and can drive a second tool simultaneously, it suits heavy equipment. Note this non-magnetic SKU cannot take sensors.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X200 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X200 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X200 |
| 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-SAID50X200 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-SAID50X200 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-SID50X200
| 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-SID50X200 Is Used
Excavator Linkage
Equal both-ways force drives dual-tool linkage arms on heavy equipment without stroke drift.
Loader Gimbal
The second rod resists torsional side-load on a loader gimbal joint, ensuring smooth articulation.
Crane Slewing Lock
Provides stable deceleration at stroke end for crane slewing stops, though an external lock is needed for holding.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X200 with the B04-SAID50X200
To replace the discontinued B04-SID50X200, use the SAID50X200; it matches the 50mm bore, 200mm stroke, G1/4 port, and M16x1.5 thread. Force is equal both ways (825 N @0.5 MPa); if you need more lift, step up to the 63mm bore (1402 N), or drop to the 40mm bore (528 N) for lighter loads. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools from one piston. Reuse FA, LB, or TC mounts directly. This SKU lacks the -S magnet, so it cannot accept legacy CS1-B/DS1-B sensors. For strokes >=300mm, ensure side-load alignment to prevent binding. A plain cylinder drifts on air loss; for held loads use an external rod lock or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X200
- ✓ 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-SID50X200 FAQ
Yes, it is discontinued. The direct replacement is the SAID50X200. The B04- prefix simply marks it as the construction-machinery dedicated variant of the SID50X200, so all physical specs (50mm bore, 200mm stroke, G1/4 port) are identical. The SAID upgrade adds an improved piston seal.
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. Speed is 30-800 mm/s. It uses a G1/4 port and 30mm adjustable cushions. It cannot hold a load on air loss; use an external rod lock for vertical holding.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID50X200
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID50X200 replacement — usually within 7-8 hours.