This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X175, 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-SID50X175
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X175 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø50mm bore and 175mm stroke, G1/4 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the B04-SAID50X175, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke175 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → B04-SAID50X175
- 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-SID50X175
The AirTAC B04-SID50X175 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. The B04- prefix marks this as a construction-machinery dedicated variant, mechanically identical to the base SID50X175 with a 50mm bore, 175mm stroke, and G1/4 port. Because the SID line is discontinued, the direct replacement is the SAID50X175, which reuses the exact same mounting interface and adds an upgraded two-piece Y-shaped piston seal for lower start-up pressure and longer life.
A double-rod design prevents piston rotation and lets the back rod drive a second tool or sensor cam simultaneously. Note this non-magnetic SKU cannot accept position switches, and the air cushion only decelerates the load near stroke end; an external rod lock or pilot-operated check valve is required to hold loads securely on air loss.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X175 Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X175 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X175 |
| Bore size | Ø50 mm |
| Stroke | 175 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-SAID50X175 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-SAID50X175 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-SID50X175
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×175 | 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-SID50X175 Is Used
Excavator Linkage Control
Provides equal push/pull force for synchronized actuation of heavy-equipment guide plates, utilizing the double-rod design to prevent rotation under high side-load conditions.
Crane Boom Alignment
Drives dual alignment stops simultaneously from both rod ends, ensuring parallel tracking of telescopic boom sections in construction-machinery applications.
Loader Attachment Shift
Handles rapid side-shifting of loader buckets with equal force both ways, maintaining precise positioning without torsional deflection during material handling.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X175 with the B04-SAID50X175
To replace the discontinued B04-SID50X175, specify the SAID50X175, which matches the 50mm bore, 175mm stroke, G1/4 port, and ISO 15552 mounting dimensions perfectly. When sizing both ways, verify the equal force of 825 N @0.5 MPa meets your requirement, or step to neighbouring bores (63mm for 1402 N, 40mm for 528 N). Choose a double-rod configuration when you need anti-rotation stability or must drive two mechanisms from one cylinder. Reuse existing FA, LB, or TC mounts. Since this SKU lacks the -S magnet, it cannot support legacy CS1-B/DS1-B sensors. For strokes of 300mm or longer, carefully manage side-load alignment to prevent premature seal wear.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X175
- ✓ 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-SID50X175 FAQ
Yes, the SID line is discontinued. The direct replacement is the SAID50X175. The B04- prefix simply marks it as the construction-machinery dedicated variant; the SAID50X175 shares the identical 50mm bore, 175mm stroke, G1/4 port, and ISO 15552 mounting interface, while adding an upgraded 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. The bore is 50mm, the port is G1/4, the rod thread is M16x1.5, and the adjustable cushion is 30mm at each end. It operates at 0.15-1.0 MPa with speeds of 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the B04-SAID50X175
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