This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement B04-SAID50X175S, 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-SID50X175S
The AirTAC Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X175S 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-SAID50X175S, 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-SAID50X175S
- 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-SID50X175S
The AirTAC B04-SID50X175S is a double-acting, double-rod ISO 15552 cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the base SID50X175S, mechanically identical in every spec. Because a rod exits both ends on a single piston, both faces use the rod-side area, making push and pull force equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. It features a 50 mm bore, G1/4 air port, M16x1.5 rod thread, and 30 mm adjustable cushions. This SID model is discontinued and replaced by the direct replacement SAID50X175S.
The SAID50X175S successor retains the exact ISO 15552 mounting interface, bore, stroke, and equal force, but upgrades the piston seal to two Y-shaped one-way elements for lower start-up pressure and longer life. Note that a standard cylinder does not hold loads on air loss; the cushion only decelerates near stroke end, so use an external rod lock or SAIL/BSAI variant for held loads.
Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X175S Technical Specifications
| Model | Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X175S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAID50X175S |
| 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-SAID50X175S 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-SAID50X175S 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-SID50X175S
| 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-SID50X175S Is Used
Excavator Linkage Actuation
Provides equal push/pull force for moving heavy-equipment covers or linkage components on construction machinery, utilizing the double-rod layout to prevent rotational drift during operation.
Crusher Feed Diversion
Drives a two-way diverter gate on aggregate conveyor lines, using the back rod to mount a sensor cam for precise position feedback in dusty construction environments.
Loader Attachment Sync
Synchronizes the movement of two separate tooling attachments from a single cylinder body, ensuring both tools actuate simultaneously with identical force in both directions.
Replacing the Airtac B04-SID Construction Machinery Special ISO Standard Cylinder B04-SID50X175S with the B04-SAID50X175S
To replace the discontinued B04-SID50X175S, specify the SAID50X175S, which offers a direct swap retaining the G1/4 port, M16x1.5 thread, and ISO 15552 mounting dimensions (Basic, FA, LB, TC). When sizing both ways, verify your load against the equal push/pull force of 825 N @0.5 MPa; if higher force is needed, step up to the 63 mm bore (1402 N @0.5 MPa), or drop to the 40 mm bore (528 N @0.5 MPa) for lighter duties. A double-rod design is the right choice when you need anti-rotation stability, equal force in both directions, or a back rod to carry a sensor cam. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches. For strokes of 175 mm, side-load alignment is generally manageable, but for any stroke over 300 mm, ensure strict guide alignment to prevent rod binding.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAID50X175S
- ✓ 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-SID50X175S FAQ
Yes, the B04-SID50X175S is discontinued. The direct replacement is the SAID50X175S. The B04- prefix simply marks it as the construction-machinery dedicated variant of the base SID50X175S, so mechanically it is identical. The SAID successor shares the same ISO 15552 interface, 50 mm bore, 175 mm stroke, G1/4 port, and equal both-ways force, but adds an upgraded piston seal for longer life.
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 0.15-1.0 MPa (proof 1.5 MPa) with a speed of 30-800 mm/s. The bore is 50 mm with a G1/4 port, M16x1.5 rod thread, and 30 mm adjustable cushions. It does not hold loads without live air; use an external rod lock for holding.
Related AirTAC SAI Cylinders
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