Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X175S
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X175S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø50mm bore, 175mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke175 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X175S
The B04-SCD50X175S is an AirTAC double-acting, double-rod cylinder engineered for construction machinery. The B04- prefix designates this as a construction-machinery dedicated variant of the standard SCD50X175S, meaning it is mechanically identical to the base model with no changes to dimensions or force output. It uses a 50 mm bore and a 175 mm stroke, driven by a Ø20 mm piston rod that protrudes from both end caps.
Because the rod area is subtracted on both sides, thrust is perfectly symmetrical, yielding 825 N of force in each direction at 0.5 MPa and 1484 N at 0.9 MPa. The barrel measures 207 mm in body length A(SCD) and features adjustable cushions with a 21 mm stroke length to soften end-of-travel impacts. An integrated magnetic ring allows CMSG, DMSG, or EMSG sensors to track piston position along the exterior.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X175S Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X175S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 175 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| 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, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCD (double-rod) datasheet. Because the rod runs through both caps, the effective area is (bore² − rod²) in both directions. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø50mm, double rod)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 kgf | |
Push and pull are EQUAL on a double-rod cylinder — both chambers lose the rod area, so effective area = (bore² − rod²) each way. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X175S
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×175 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCJ (adjustable stroke), SCT (multi-position). SCD mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X175S Is Used
Excavator Linkages
Drives auxiliary mechanisms on heavy equipment where the B04- prefix indicates dedicated construction-machinery service, utilizing equal push and pull forces for balanced linkage actuation.
Shuttle Transfer Tables
Moves parts back and forth with identical speed and force in both directions, leveraging the dual-end rod to mount tooling or stops on either side of the fixture.
Non-Rotating Pushers
Pushes workpieces from both ends with high torsional resistance, using the extra bearing surface of the through rod to prevent deflection during heavy pressing.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X175S the Right Cylinder?
Select this 50 mm bore when an application demands 825 N of symmetrical thrust at 0.5 MPa. If your mechanism requires less force, stepping down to a 40 mm bore provides 528 N each way, while moving up to a 63 mm bore offers 1402 N. If you do not need rear-side tooling, equal bi-directional force, or the anti-rotation benefits of a through rod, a standard single-rod AirTAC SC cylinder is a lighter and more compact alternative.
For replacements, match the 50 mm bore, 175 mm stroke, PT1/4 port thread, basic mounting style, and the integrated magnet (-S). At a 175 mm stroke, side loading is moderate, but always ensure external guides support the load rather than relying solely on the through rod, as a double-rod design improves guidance but cannot replace a true guided cylinder under heavy lateral stress.
Double-rod checklist
- ✓ Need equal force / speed both directions?
- ✓ Rear rod for tooling, stopper or sensor flag?
- ✓ Better rod guidance / anti-rotation?
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Keep BOTH rod ends clear of side load and interference.
- check Adjust end cushion screws for smooth stops.
- check Use SCD mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X175S FAQ
The B04- prefix marks this as a construction-machinery dedicated variant of the SCD50X175S. It is mechanically identical to the base SCD model, offering the exact same 50 mm bore, 175 mm stroke, and 825 N equal push/pull force at 0.5 MPa, simply designated for heavy-equipment builders.
A double-rod cylinder provides identical push and pull forces because the rod occupies volume on both sides of the piston. It also allows tooling to be mounted on the rear rod, offers better anti-rotation resistance, and balances bearing wear symmetrically, which a single-rod SC cannot achieve.
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