Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X350
The AirTAC B04-SC Construction Machinery Special Standard Cylinder B04-SC40X350 is a genuine double-acting standard air cylinder with a Ø40mm bore and 350mm stroke, PT1/4 air ports and adjustable end cushioning. It is used for push, pull, lift and clamp motion in industrial automation.
- BoreØ40 mm
- Stroke350 mm
- Port sizePT1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
- 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-SC Construction Machinery Special Standard Cylinder B04-SC40X350
The B04-SC40X350 is an AirTAC double-acting tie-rod pneumatic cylinder where the B04- prefix denotes the construction-machinery dedicated variant, mechanically identical to the standard SC40X350. It features a 40mm bore and a 350mm stroke, generating 628N of push force at 0.5 MPa and 1130N at 0.9 MPa.
This model uses a 16mm piston rod, a PT1/4 port, and 21mm adjustable cushions to decelerate the piston at stroke ends. With a body length A of 142mm, the total extended length reaches approximately 492mm. The standard TPU seals support an operating temperature range of -20 to +70 C.
Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X350 Technical Specifications
| Model | Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X350 |
|---|---|
| Series | SC standard tie-rod cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 mm |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 SC series datasheet. Operating pressure 0.15–1.0 MPa, proof pressure 1.5 MPa, temperature −20 to +70 °C. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (approx.) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X350
| SC | Standard tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: SCD (double rod), SCJ (adjustable stroke), SCT (multi-position). Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X350 Is Used
Excavator Door Control
Actuates heavy cab doors on earthmoving equipment, providing reliable 628N push force to open and close panels in dusty environments.
Concrete Mixer Discharge
Drives the discharge gate mechanism on batching trucks, using adjustable cushions to soften the impact at the end of the 350mm travel.
Track Tensioning System
Maintains proper track tension on tracked pavers and excavators by adjusting the idler position under 0.7 MPa operating pressure.
Is the Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X350 the Right Cylinder?
This 40mm bore provides 628N push at 0.5 MPa; step down to a 32mm bore (402N) for lighter loads or up to a 50mm bore (982N) if your construction equipment needs more clamping force. For replacement, match the 40mm bore, 350mm stroke, PT1/4 port, basic mounting, and non-magnet configuration exactly.
At 350mm of stroke, the 16mm rod is susceptible to bending under side loads. For heavy construction machinery applications, use an external guide rail or a guided cylinder to prevent rod bearing wear and ensure smooth linear motion.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac B04-SC Construction Machinery Special Standard Cylinder B04-SC40X350 FAQ
The B04- prefix indicates this is a construction-machinery dedicated variant of the standard AirTAC SC40X350. It is mechanically identical to the base model, offering the same 40mm bore, 350mm stroke, 1130N thrust at 0.9 MPa, and PT1/4 porting.
No, this double-acting cylinder does not hold position when air pressure is lost. The adjustable cushions only decelerate the piston near the stroke ends. To hold a vertical load safely on construction equipment, you must use an external mechanical lock or a pilot-operated check valve.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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