Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X350
The AirTAC Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X350 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, 350mm stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Rod (both ends)Ø20 mm
- Stroke350 mm
- Port sizePT1/4
- Rod configDouble rod (through)
- CushionAdjustable, 21 mm
About the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X350
The B04-SCD50X350 is an AirTAC double-acting, double-rod cylinder where the B04- prefix designates it as a construction-machinery dedicated variant of the standard SCD50X350. Mechanically identical to the base model, it features a 50 mm bore and a 350 mm stroke. Because the Ø20 mm piston rod passes through both end caps, the effective area is identical in both chambers, yielding an equal push and pull force of 825 N at 0.5 MPa and 1484 N at 0.9 MPa.
This symmetric thrust is ideal for heavy-equipment actuation requiring two-sided tooling or non-rotating pushers. The cylinder body length A(SCD) is 207 mm, and it incorporates adjustable cushions with a 21 mm length to decelerate the piston near the end caps. Fluid must be filtered to 40 um, and the operating pressure ranges from 0.15 to 1.0 MPa.
Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X350 Technical Specifications
| Model | Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X350 |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 350 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-SCD50X350
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×350 | 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-SCD50X350 Is Used
Excavator Panel Shifting
Drives symmetric positioning arms on heavy equipment using equal bidirectional thrust to shift or align heavy steel panels without rotational drift.
Shuttle Transfer Tables
Moves construction materials back and forth on a shuttle table, utilizing the rear rod end to mount a stopper block or physical stroke flag.
Dual-Tool Actuation
Carries tooling on both rod ends to perform simultaneous clamping and pushing operations in compact machinery setups where space is limited.
Is the Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X350 the Right Cylinder?
Choose this 50 mm bore when an application demands exactly 825 N of thrust in both directions at 0.5 MPa. If your machine requires less force, stepping down to a 40 mm bore provides 528 N each way; if more power is needed, a 63 mm bore yields 1402 N. Select a single-rod SC cylinder if rear-side tooling or anti-rotation guidance is unnecessary, or opt for a fully guided cylinder if the mechanism experiences severe side loads.
At 350 mm of stroke, the unsupported rod length is substantial. To prevent rod bending and premature bearing wear under side loads, use an external guide rail or a guided cylinder instead of relying solely on the through-rod for support. Replacement requires an exact match of bore, stroke, PT port thread, SCD mounting accessory, and magnet option.
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-SCD50X350 FAQ
The B04- prefix indicates this is an AirTAC construction-machinery dedicated variant of the SCD50X350. It is mechanically identical to the standard double-rod cylinder, offering the same 50 mm bore, 350 mm stroke, and 825 N equal push/pull force at 0.5 MPa.
No, the adjustable cushion only decelerates the piston near the stroke ends to reduce impact. It does not lock or hold the load. If the construction machinery must maintain position without live air pressure, an external mechanical lock or pilot-operated check valve is required.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SCD Double-Rod Cylinders
Request a Quote for Airtac B04-SCD Specialized Standard Cylinder for Construction Machinery B04-SCD50X350
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.