This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X150, 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-SID50X150
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X150 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 150mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID50X150, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke150 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID50X150
- 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-SID50X150
The AirTAC B04-SID50X150 is a double-acting, double-rod ISO 15552 cylinder where a rod exits both ends, generating equal push and pull force (825 N at 0.5 MPa). The B04- prefix marks this as AirTAC's construction-machinery dedicated variant of the base SID50X150, mechanically identical to the standard model. This SKU has no -S magnet and cannot carry a sensor. As an equal-both-ways cylinder, it resists rotation and can drive two tools simultaneously. It features a 20 mm rod, M16x1.5 thread, and a G1/4 port.
This SID model is discontinued and end-of-life. The direct replacement is the SAID50X150 (same ISO 15552 interface, bore, stroke, force, port and mounting). The SAI upgrade uses an improved two-piece Y-shaped piston seal for lower start-up pressure and longer life. Note that a plain cylinder drifts on air loss; the cushion only decelerates near stroke end, so use an external rod lock for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X150 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X150 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X150 |
| Bore size | Ø50 mm |
| Stroke | 150 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-SAID50X150 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-SAID50X150 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-SID50X150
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×150 | 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-SID50X150 Is Used
Excavator Linkage Control
Drives dual-tool mechanisms on heavy equipment with equal push and pull force, preventing rotational play in tight construction-machinery envelopes.
Material Transfer Gates
Simultaneously actuates opposing gates from a single center point, leveraging the double-rod's equal both-ways force for balanced material flow.
Crusher Feed Adjuster
Provides stable, anti-rotation positioning for heavy-duty aggregate machinery where a single-rod cylinder would introduce uneven thrust.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X150 with the B04-SAID50X150
Replace the discontinued B04-SID50X150 directly with the SAID50X150, reusing your existing FA, LB, or TC ISO 15552 mounts. Size both ways by checking neighbouring bores (40 mm or 63 mm) if you need to adjust the equal 825 N force. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools from one piston. Because this SKU lacks the -S magnet, it cannot accept sensors; confirm if you need the -S version for position feedback. For this 150 mm stroke, side-load alignment is generally manageable, but for any stroke >=300 mm ensure proper guide support to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X150
- ✓ 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-SID50X150 FAQ
Yes, the B04-SID50X150 is discontinued. The direct replacement is the SAID50X150. The B04- prefix simply marks it as the construction-machinery dedicated variant; mechanically it is identical to the base SID50X150. The SAID50X150 matches its ISO 15552 interface, 50 mm bore, 150 mm stroke, G1/4 port, and mounting.
Force is equal both ways: 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. It uses a G1/4 port, has a 20 mm rod with an M16x1.5 thread, and operates at speeds of 30-800 mm/s. The cylinder does not hold load on air loss; the 30 mm adjustable cushion only decelerates near stroke end.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID50X150
Send us the quantity and destination. We confirm price, stock and lead time on the B04-SAID50X150 replacement — usually within 7-8 hours.