This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X600S, 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-SID50X600S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X600S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 600mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID50X600S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke600 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID50X600S
- 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-SID50X600S
The AirTAC B04-SID50X600S is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, ensuring push and pull force are equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. The B04- prefix marks this as a construction-machinery dedicated variant, mechanically identical to the base SID50X600S with a 50 mm bore, G1/4 port, and 600 mm stroke. This legacy model is discontinued and is replaced direct by the SAID50X600S, which reuses the exact ISO 15552 mounting interface and adds an upgraded piston seal using two Y-shaped one-way elements for lower start-up pressure and longer life.
Because both faces use the rod-side area, the equal-both-ways output provides intrinsic anti-rotation and allows the back rod to carry a sensor cam for dual-tool actuation. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. Note that air cushions only decelerate the piston near stroke end; a plain cylinder will not hold a load on air loss, requiring an external rod lock or SAIL/BSAI variant for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X600S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X600S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X600S |
| Bore size | Ø50 mm |
| Stroke | 600 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-SAID50X600S 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-SAID50X600S 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-SID50X600S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×600 | 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-SID50X600S Is Used
Excavator Linkage Actuation
Drives balanced push and pull movements on heavy-equipment cabin components or auxiliary linkage arms where equal both-ways force and anti-rotation are critical.
Loader Tool Synchronization
Uses the rear extending rod to mechanically synchronize a secondary mechanism or mount a sensor cam, ensuring precise positioning in harsh construction-machinery environments.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X600S with the B04-SAID50X600S
To replace the discontinued B04-SID50X600S, install the SAID50X600S directly into your existing ISO 15552 mounting hardware (Basic, FA, LB, or TC) without dimensional changes. When sizing both ways, verify the equal force of 825 N @0.5 MPa meets your load, or step to neighbouring bores like the 63 mm (1402 N) or down to the 40 mm (528 N) depending on requirement. A double-rod design is correct when you need equal push/pull force, anti-rotation stability, or a back rod to drive a second tool. The -S magnet supports position sensing. For this 600 mm stroke, external guides are strongly recommended to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X600S
- ✓ 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-SID50X600S FAQ
Yes, the B04-SID50X600S is discontinued. The direct replacement is the SAID50X600S. The B04- prefix simply marks it as the construction-machinery dedicated variant, so the SAID replacement shares the identical 50 mm bore, 600 mm stroke, G1/4 port, and ISO 15552 mounting interface, while adding an upgraded piston seal.
As 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 bore is 50 mm, the air port is G1/4, the rod thread is M16x1.5, and it features 30 mm adjustable air cushions at each end. Speed ranges from 30-800 mm/s.
Related AirTAC SAI Cylinders
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